John G. Spray

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John G. Spray is affiliated with the following schools: University of California, Berkeley, Stanford University

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John G. Spray

Computer Science

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#8054

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Computational Linguistics

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#1583

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Machine Learning

#2895

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#2931

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Artificial Intelligence

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#3236

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computer-science Degrees

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Computer Science

John G. Spray's Degrees

PhD Computer Science Stanford University
Masters Computer Science University of California, Berkeley
Bachelors Computer Science University of California, Berkeley

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John G. Spray's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Pseudotachylyte controversy: Fact or friction? (1995) (273)
A physical basis for the frictional melting of some rock-forming minerals (1992) (266)
Frictional melting processes and products in geological materials: introduction and discussion (1992) (203)
Age constraints on the igneous and metamorphic evolution of the Hellenic-Dinaric ophiolites (1984) (190)
Artificial generation of pseudotachylyte using friction welding apparatus: simulation of melting on a fault plane (1987) (185)
Frictional Melting Processes in Planetary Materials: From Hypervelocity Impact to Earthquakes (2010) (172)
VISCOSITY DETERMINATIONS OF SOME FRICTIONALLY GENERATED SILICATE MELTS : IMPLICATIONS FOR FAULT ZONE RHEOLOGY AT HIGH STRAIN RATES (1993) (152)
Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X‐ray diffraction of the Windjana sample (Kimberley area, Gale Crater) (2016) (147)
Friction melt distribution in a multi-ring impact basin (1995) (139)
Impact‐induced hydrothermal activity within the Haughton impact structure, arctic Canada: Generation of a transient, warm, wet oasis (2001) (135)
Impact-generated carbonate melts: evidence from the Haughton structure, Canada (2001) (125)
Generation of plagiogranite by amphibolite anatexis in oceanic shear zones (1991) (117)
Petrology and 40Ar/39Ar geochronology of some hellenic sub-ophiolite metamorphic rocks (1980) (116)
Possible causes and consequences of upper mantle decoupling and ophiolite displacement (1984) (102)
The nature of the groundmass of surficial suevite from the Ries impact structure, Germany, and constraints on its origin (2004) (102)
A case study of impact‐induced hydrothermal activity: The Haughton impact structure, Devon Island, Canadian High Arctic (2005) (98)
Evidence for a late Triassic multiple impact event on Earth (1998) (98)
Geological overview and cratering model for the Haughton impact structure, Devon Island, Canadian High Arctic (2005) (92)
Dynamic fragmentation of granite for impact energies of 6–28 J (2012) (92)
Laser probe argon‐40/argon‐39 dating of coesite‐ and stishovite‐bearing pseudotachylytes and the age of the Vredefort impact event (1995) (83)
Tectonics of complex crater formation as revealed by the Haughton impact structure, Devon Island, Canadian High Arctic (2005) (76)
Localized shock- and friction-induced melting in response to hypervelocity impact (1998) (75)
Tectonic influences on the morphometry of the Sudbury impact structure: Implications for terrestrial cratering and modeling (2004) (75)
A half-ridge transform model for the Hellenic-Dinaric ophiolites (1984) (73)
Evidence for melt lubrication during large earthquakes (2005) (70)
A U/Pb age for the Shetland Islands oceanic fragment, Scottish Caledonides: evidence from anatectic plagiogranites in ‘layer 3’ shear zones (1991) (69)
Fluids during diagenesis and sulfate vein formation in sediments at Gale crater, Mars (2016) (66)
Quantitative electron-microprobe analysis of alkali silicate glasses; a review and user guide (1995) (65)
Control of impact crater fracture systems on subsurface hydrology, ground subsidence, and collapse, Mars (2005) (65)
Impactites of the Haughton impact structure, Devon Island, Canadian High Arctic (2005) (64)
Late Eocene impact ejecta: geochemical and isotopic connections with the Popigai impact structure (2000) (63)
Pseudotachylyte petrogenesis: constraints from the Sudbury impact structure (1996) (63)
U-Pb geochronology and origin of granitoid rocks in the Thetford Mines ophiolite, Canadian Appalachians (2000) (62)
APXS‐derived chemistry of the Bagnold dune sands: Comparisons with Gale Crater soils and the global Martian average (2017) (59)
Generation and crystallization of an amphibolite shear melt: an investigation using radial friction welding apparatus (1988) (59)
The Alpha-Particle-X-Ray-Spectrometer(APXS) for the Mars Science Laboratory (MSL) Rover Mission (2009) (56)
Potassium‐rich sandstones within the Gale impact crater, Mars: The APXS perspective (2016) (53)
Origin and emplacement of Offset Dykes in the Sudbury impact structure: Constraints from Hess (1998) (52)
The Close-Up Imager Onboard the ESA ExoMars Rover: Objectives, Description, Operations, and Science Validation Activities. (2017) (51)
Origin of “toasted” quartz in terrestrial impact structures (2002) (51)
Mineralogy and petrology of melt rocks from the Popigai impact structure, Siberia (2002) (50)
Pseudotachylytic rock distribution and genesis within the Sudbury impact structure (1992) (49)
Impact‐induced frictional melting in ordinary chondrites: A mechanism for deformation, darkening, and vein formation (2003) (49)
Geology, Mineralization, and Emplacement of the Foy Offset Dike, Sudbury Impact Structure (2002) (48)
A late Triassic age for the Rochechouart impact structure, France (1997) (47)
Thrust-related metamorphism beneath the Shetland Islands oceanic fragment, northeast Scotland (1988) (47)
Shock-induced crystal-plastic deformation and post-shock annealing of quartz microstructural evidence from crystalline target rocks of the Charlevoix impact structure, Canada (2006) (46)
Impact melting in sedimentary target rocks: An assessment (2007) (46)
The sub-ophiolite metamorphic rocks of the Ballantrae Igneous Complex, SW Scotland (1980) (45)
(U‐Th)/He dating of terrestrial impact structures: The Manicouagan example (2011) (44)
The Manicouagan impact structure as a terrestrial analogue site for lunar and martian planetary science (2010) (41)
Evidence for upper cretaceous transform fault metamorphism in West Cyprus (1981) (40)
Shock implantation of Martian atmospheric argon in four basaltic shergottites : A laser probe 40Ar/39Ar investigation (2007) (38)
Gale crater and impact processes – Curiosity’s first 364 Sols on Mars (2015) (37)
Shock‐induced melting and vaporization of shatter cone surfaces: Evidence from the Sudbury impact structure (1998) (37)
The sub-ophiolitic metamorphic rocks of the Québec Appalachians (1995) (36)
Laser probe argon‐40/argon‐39 dating of pseudotachylyte from the Sudbury Structure: Evidence for postimpact thermal overprinting in the North Range (1998) (36)
El'gygytgyn impact crater, Chukotka, Arctic Russia: Impact cratering aspects of the 2009 ICDP drilling project (2013) (35)
Geology, Mineralization, and Emplacement of the Whistle-Parkin Offset Dike, Sudbury (2002) (35)
The Shawmere anorthosite and OB-1 as lunar highland regolith simulants (2009) (34)
Constraints on central uplift structure from the Manicouagan impact crater (2008) (34)
Planar microstructures and Dauphiné twins in shocked quartz from the Charlevoix impact structure, Canada (2005) (34)
Evidence for the shock melting of sulfates from the Haughton impact structure, Arctic Canada (2003) (34)
Mineralogy, microtexture, and composition of shock‐induced melt pockets in thi Los Angeles basaltic shergottite (2003) (32)
Micro-scale energy dissipation mechanisms during dynamic fracture in natural polyphase ceramic blocks (2011) (32)
Quartz–coesite–stishovite relations in shocked metaquartzites from the Vredefort impact structure, South Africa (2018) (32)
40Ar/39Ar age constraints on Taconian and Acadian events in the Quebec Appalachians (1996) (30)
Effect of Annealing Heat Treatment on the Microstructural Evolution and Mechanical Properties of Hot Isostatic Pressed 316L Stainless Steel Fabricated by Laser Powder Bed Fusion (2020) (29)
Mafic segregations in ophiolite mantle sequences (1982) (29)
Initial MSL APXS Activities and Observations at Gale Crater, Mars (2013) (29)
Drivers and Dynamics of Internal and International Remittances (2013) (28)
A laser probe 40Ar/39Ar and INAA investigation of four Apollo granulitic breccias (2008) (28)
Microstructure Evolution, Mechanical Properties and Deformation Behavior of an Additively Manufactured Maraging Steel (2020) (28)
MAGNETIC FABRIC CONSTRAINTS ON FRICTION MELT FLOW REGIMES AND ORE EMPLACEMENT DIRECTION WITHIN THE SOUTH RANGE BRECCIA BELT, SUDBURY IMPACT STRUCTURE (1999) (28)
Geochemistry of the impact‐generated melt sheet at Manicouagan: Evidence for fractional crystallization (2011) (28)
APXS‐Derived Compositional Characteristics of Vera Rubin Ridge and Murray Formation, Gale Crater, Mars: Geochemical Implications for the Origin of the Ridge (2020) (28)
The South Range Breccia Belt of the Sudbury Impact Structure: A possible terrace collapse feature (2000) (27)
Impact Structures of Canada (2008) (27)
Slickenside formation by surface melting during the mechanical excavation of rock (1989) (26)
In situ LA-ICP-MS apatite and zircon U–Pb geochronology of the Nicholson Lake impact structure, Canada: Shock and related thermal effects (2018) (25)
Lithification Mechanisms for Planetary Regoliths: The Glue that Binds (2016) (24)
Superimposition of a Thrust-Transfer Fault System on a Large Impact Structure: Implications for Ni-Cu-PGE Exploration at Sudbury (2006) (24)
Shock veins in the central uplift of the Manicouagan impact structure: Context and genesis (2011) (24)
Elemental Composition and Chemical Evolution of Geologic Materials in Gale Crater, Mars: APXS Results From Bradbury Landing to the Vera Rubin Ridge (2020) (23)
Frictional melting of sedimentary rock during high-speed diamond drilling : An analytical SEM and TEM investigation (1992) (23)
Shocking rocks by cavitation and bubble implosion (1999) (21)
Chemical Diversity of Sands Within the Linear and Barchan Dunes of the Bagnold Dunes, Gale Crater, as Revealed by APXS Onboard Curiosity (2018) (21)
Automated microscopy and particle size analysis of dynamic fragmentation in natural ceramics (2013) (20)
The Strangways impact structure, Northern Territory, Australia: geological setting and laser probe 40Ar/39Ar geochronology (1999) (19)
Dynamic Fragmentation of Natural Ceramic Tiles: Ejecta Measurements and Kinetic Consequences (2013) (19)
Crystallization rates of shock melts in three martian basalts: Experimental simulation with implications for meteoroid dimensions (2006) (18)
A new Martian meteorite from Oman: Mineralogy, petrology, and shock metamorphism of olivine‐phyric basaltic shergottite Sayh al Uhaymir 150 (2005) (18)
Industries without Smokestacks in Uganda and Rwanda (2018) (18)
Lithosphere–asthenosphere decoupling at spreading centers and initiation of obduction (1983) (17)
Dynamic fragmentation of planetary materials: Ejecta length quantification and semi-analytical modelling (2013) (17)
Dating the cooling of exhumed central uplifts of impact structures by the (U–Th)/He method: A case study at Manicouagan (2014) (17)
Mineralogy, geochemistry, and 40Ar–39Ar geochronology of lunar granulitic breccia Northwest Africa 3163 and paired stones: Comparisons with Apollo samples (2011) (17)
Dynamothermal transition zone between Archaean greenstone and granitoid gneiss at Lake Dundas, Western Australia (1985) (15)
CLUPI, a high-performance imaging system on the ESA-NASA rover of the 2018 ExoMars mission to discover biofabrics on Mars (2012) (15)
IMPACT-RELATED Ca-METASOMATISM IN CRYSTALLINE TARGET-ROCKS FROM THE CHARLEVOIX STRUCTURE, QUEBEC, CANADA (2005) (15)
InSAR Monitoring of Landslide Activity in Dominica (2021) (15)
Element diffusion rates in lunar granulitic breccias: Evidence for contact metamorphism on the Moon (2011) (14)
Statistical Analysis of APXS‐Derived Chemistry of the Clay‐Bearing Glen Torridon Region and Mount Sharp Group, Gale Crater, Mars (2022) (14)
Shock-Induced Phase Transformations in Melt Pockets within Martian Meteorite NWA 4468 (2011) (14)
Nd isotope mapping of Grenvillian crustal terranes in the vicinity of the Manicouagan Impact Structure (2011) (14)
Upper mantle segregation processes: evidence from alpine-type peridotites (1989) (13)
In situ multiphase U–Pb geochronology and shock analysis of apatite, titanite and zircon from the Lac La Moinerie impact structure, Canada (2019) (13)
Dynamic interaction between impact melt and fragmented basement at Manicouagan: The suevite connection (2017) (13)
The effects of crater degradation and target differences on the morphologies of Martian complex craters (2010) (12)
Crystallization and emplacement chronology of the Fournier oceanic fragment, Canadian Appalachians (1990) (11)
Planning for a Mars in situ sample preparation and distribution (SPAD) system (2004) (11)
A paleomagnetic and rock magnetic study of the Manicouagan impact structure: Implications for crater formation and geodynamo effects (2016) (11)
The Manicouagan impact melt sheet: Evidence for isotopic homogenization with limited assimilation (2012) (11)
Mineralogy, petrology, and shock history of lunar meteorite Sayh al Uhaymir 300: A crystalline impact‐melt breccia (2007) (10)
The static and dynamic mechanical properties of a new low-carbon, low-alloy austempered steel (2014) (10)
The Composition of the Basal Murray Formation at Pahrump Hills, Gale Crater, Mars (2015) (10)
Possible causes of upper mantle decoupling and ophiolite displacement (1984) (10)
Reorganise, Replace or Expand? The role of the supply-chain in first-time exporting (2017) (10)
Context matters – Ar–Ar results from in and around the Manicouagan Impact Structure, Canada: Implications for martian meteorite chronology (2018) (10)
Diachroneity of the Clearwater West and Clearwater East impact structures indicated by the (U-Th)/He dating method (2016) (9)
Alteration at the Base of the Siccar Point Unconformity and Further Evidence for an Alkaline Provenance at Gale Crater: Exploration of the Mount Sharp Group, Greenheugh Pediment Cap Rock Contact With APXS (2022) (9)
SHATTER CONES OF THE HAUGHTON IMPACT STRUCTURE , CANADA (2006) (9)
Friction phenomena in rock: an introduction (1989) (8)
Fracture and fragmentation of quartz and albite during single-diamond sliding-point contact (2012) (8)
Zircon-Reidite Relations in Breccias from the Chesapeake Bay Impact Structure (2009) (8)
Post-Shock Crystal-Plastic Processes in Quartz from Crystalline Target Rocks of the Charlevoix Impact Structure (2004) (8)
Micro-scale deformation of gypsum during micro-indentation loading (2012) (8)
Compositional Characteristics and Trends Within the Vera Rubin Ridge, Gale Crater, Mars as Determined by APXS: Sedimentary, Diagenetic and Alteration History (2019) (8)
IMPACT MELTING IN SEDIMENTARY TARGET ROCKS (2002) (7)
Dynamic fragmentation of planetary materials: Sub-hypervelocity ejecta measurements and velocity scaling (2013) (6)
Microtextural Characterization of Additively Manufactured SS316L After Hot Isostatic Pressing Heat Treatment (2021) (6)
Multiphase U-Pb geochronology of sintered breccias from the Steen River impact structure, Canada: Mixed target considerations for a Jurassic-Cretaceous boundary event (2020) (6)
Mineralogy, petrology, and thermal evolution of the Benton LL6 chondrite (2003) (6)
Determining Source of Ejecta Using Heavy Mineral Provenance Techniques; A Manicouagan Distal Ejecta Case Study (2008) (6)
Applications of time-of-flight lidar in crater geology (2003) (6)
Post-Impact Hydrothermal Activity at the Haughton Impact Structure, Devon Island, Nunavut, Canada (2000) (6)
Non-cylindrical, flexural slip folding in the Ardwell flags—a statistical approach (1979) (6)
Structure of the oceanic crust as deduced from ophiolites (1991) (6)
Impact Failure of Planetary Materials: (2013) (6)
Generation of a lunar regolith agglutinate simulant using friction welding apparatus (2010) (6)
Assessing the Benefits of Simulated RADARSAT Constellation Mission Polarimetry Images for Structural Mapping of an Impact Crater in the Canadian Shield (2018) (5)
Debris Field Kinetics during the Dynamic Fragmentation of Polyphase Natural Ceramic Blocks (2013) (5)
Retrograde eclogite from Mont Albert, Gaspé, Quebec: Discussion (1988) (5)
U–Pb geochronology of apatite and zircon from the Brent impact structure, Canada: a Late Ordovician Sandbian–Katian boundary event associated with L-Chondrite parent body disruption (2020) (5)
The Use of a Railgun Facility for Dynamic Fracture of Brittle Materials (2014) (5)
The use of a railgun facility for dynamic fracture of brittle materials (2015) (5)
APXS Compositional Trends Along Curiosity's Traverse, Gale Crater, Mars: Implications for Crustal Composition, Sedimentary Provenance, Diagenesis, and Alteration (2016) (4)
BT-2 Calibration Target for Mars Science Laboratory Alpha Particle X-Ray Spectrometer: Characterization and Alkali Basalt Martian Analogue (2013) (4)
Late Caledonian northeastward ophiolite thrusting in the Shetland Islands U.K. — Discussion of the obduction process (1991) (4)
Ultrametamorphism of Impure Carbonates Beneath the Manicouagan Impact Melt Sheet: Evidence for Superheating (2006) (4)
(U-Th)/He DATING OF SINGLE ZIRCON AND APATITE CRYSTALS – A NEW TOOL FOR DATING TERRESTRIAL IMPACT STRUCTURES (2009) (4)
Fracture and Fracture Networks Theory and Applications of Transport in Porous Media.By Pierre M. Adler and Jean-François Thovert. Kluwer Academic Publishers, Dordrecht, The Netherlands, 1999, 429 pages. US$213 (hardcover). (ISBN 0–7923 5647–0). (2000) (4)
A marine magnetic study of a carbonate-hosted impact structure: Ile Rouleau, Canada (2009) (4)
Developing an Anorthositic Lunar Regolith Simulant (2006) (4)
SEARCH FOR PROJECTILE TRACES IN MELT ROCKS OF THE CHARLEVOIX AND DELLEN IMPACT STRUCTURES (2008) (4)
Abstraction Layered Architecture: Writing Maintainable Embedded Code (2018) (4)
Experimental frictional heating of dolomitic marble; new insights for Martian meteorite Allan Hills 84001 (1999) (4)
Structural and Geochronologic Constraints on the Timing of the Charlevoix Impact, Quebec, Canada (2003) (4)
Dating the Charlevoix Impact Structure (Québec, Canada) --- A Tough Nut to Crack in 40Ar/39Ar Geochronology (2010) (4)
Stöfflerite, (Ca,Na)(Si,Al)4O8 in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856 (2021) (4)
Search Externalities in Firm-to-Firm Trade (2021) (3)
APXS Determined Chemistry of the Vera Rubin (Hematite) Ridge, Gale Crater, Mars: Implications for Hematite Signature Origin (2018) (3)
22. Pseudotachylyte Type Area: The Vredefort Structure, South Africa (1998) (3)
(U-Th)/He Dating of Impact Structures - The Big, the Small, and the Potential Limitations (2012) (3)
Planetary science: Impacts in the round (2002) (3)
Impact Melt Rocks from the Ries Impact Structure, Germany: Preliminary Results of an Analytical SEM Study (2003) (3)
Preliminary Comparison of Soils Within Gale Crater to Those from Gusev Crater and Meridiani Planum (2016) (3)
Price Controls in Liberia (2019) (3)
RECRYSTALLIZATION AND MICRO-TWINNING IN APATITE AND TITANITE FROM THE LAC LA MOINERIE IMPACT STRUCTURE , CANADA : IMPLICATIONS FOR UPB IMPACT CHRONOLOGY (2019) (3)
The geochemistry of the Brent impact structure, Ontario, Canada (2010) (3)
Effect of Target Lithology on Impact Melting (2007) (2)
Characterization of BT-2: Calibration Target for Mars Science Laboratory Alpha Particle X-Ray Spectrometer (2012) (2)
The Effect of Retained Work Hardening on the Driving Force for Dynamic Transformation (2020) (2)
Defining the Petrology of Pseudotachylytes in Ordinary Chondrites: An Experimental and Deductive Approach (2000) (2)
Gale Crater and impact processes from Curiosity (2014) (2)
Distinguishing friction- from shock-generated melt products in hypervelocity impact structures (2021) (2)
CLUPI, a high-performance imaging system on the roverof the 2018 mission to discover biofabrics on Mars (2011) (2)
High-resolution EBSD and SIMS U–Pb geochronology of zircon, titanite, and apatite: insights from the Lac La Moinerie impact structure, Canada (2021) (2)
Exports and promoting backward linkages Ideas and lessons for the Made in Rwanda policy (2017) (2)
Shock-induced kelyphite formation in the core of a complex impact crater (2017) (2)
Compositions of sedimentary strata, nodular features and veins at the base of Mount Sharp, Gale crater, Mars: an APXS perspective (2015) (2)
UPDATED (U-Th)/He ZIRCON AGES FOR THE LAKE SAINT MARTIN IMPACT STRUCTURE (MANITOBA, CANADA) AND IMPLICATIONS FOR THE LATE TRIASSIC MULTIPLE IMPACT THEORY. (2010) (2)
TEMMI: a three-dimensional exploration multispectral microscopic imager for planetary exploration (2011) (2)
Contrasting meteoritic signatures within the Clearwater East and Clearwater West impact structures: The view from osmium isotopes (2018) (2)
The Manicouagan Impact Research Program, and Other Canadian Impact Crater Studies (2013) (2)
The Gale Impact Structure, Mars: Original Shape and Formation Age (2013) (2)
Mechanisms of Lithification of Lunar Breccias (2002) (2)
Made in Rwanda Establishing a publicly available supplier database for Rwanda (2017) (2)
(U-Th)/He Zircon Dating of the Clearwater West Impact Structure, Quebec, Canada (2013) (1)
Austenite transformation during deformation of additively manufactured H13 tool steel (2022) (1)
Similarities Between Melt-Vein Microstructures in Naturally Shocked and Experimentally Friction-melted Ordinary Chondrites (2000) (1)
Where Have All the Melts Gone (2002) (1)
Carbonate Melt Rocks from the Haughton Impact Structure, Devon Island, Nunavut, Canada (2002) (1)
Impact Failure of Planetary Materials: Lateral Field Ejecta Measurements using Particle Image Velocimetry (2014) (1)
Microstructural evidence of impact-induced crystalplastic deformation and postshock annealing of quartz (2006) (1)
Melting Rocks by Shock: Localized Shock Melting in Martian Meteorites and Target Rocks from the Manicouagan Impact Structure (2006) (1)
Effect of hot isostatic pressing on microstructural and micromechanical properties of additively manufactured 17–4PH steel (2022) (1)
Appraisal of Rapid-Fire Electromagnetic Launch Effects on Ceramic Targets (2019) (1)
Crater Count Mapping and Regional Geologic Context of the Area Surrounding the Gale Impact Structure, Mars (2012) (1)
Abstract: Haughton-Mars Project 1999: geology of the Haughton impact structure, Devon Island, Nunavut, Canada (2000) (1)
Shock Attenuation Within the Manicouagan Impact Structure (2016) (1)
Abstract: Shock veins in the central uplift of the Manicouagan impact structure (2011) (1)
Transient Crater Formation and Collapse: Observations at the Haughton Impact Structure, Arctic Canada (2003) (1)
The Los Angeles martian diabase: Phosphate U-Th-Pb geochronology and mantle source constraints (2022) (1)
Helping health. (1996) (1)
Highly Shocked Low Density Sedimentary Rocks from the Haughton Impact Structure, Devon Island, Nunavut, Canada (2001) (1)
Re-Assessment of Large Terrestrial Impact Structures: Rim and Maximum Damage Diameters (2010) (1)
Physical and Chemical Characteristics of Apollo 16 Lunar Highland Soil 64500 (2006) (1)
Landsat MSS imagery applied to geological investigation of the Norseman area granitoid–greenstone terrain, southeast Yilgarn Block, Western Australia (1985) (1)
Mineralogy and U/Pb Phosphate Dating of the Los Angeles Martian Diabase (2019) (1)
Modification-Stage Tectonics Prior to Melt Sheet Emplacement: Constraints from the Manicouagan Impact Structure (2014) (1)
RPIFs to PDUCs: New Planetary Data Utilization Centers to support NASA’s Planetary Data Ecosystem (2021) (1)
Chemistry and Microtextures of Melt Pockets in the Los Angeles Basaltic Shergottite (2002) (1)
...but the leaders may not be nurses. (1997) (1)
U-Pb geochronology of apatite crystallized within a terrestrial impact melt sheet: Manicouagan as a geochronometer test site (2021) (1)
CONSTRAINING THE DIMENSIONS OF THE MANICOUAGAN IMPACT STRUCTURE: ANALYSIS OF THE GRAVITY ANOMALY (2015) (1)
Manicouagan and the Moon: Reassessing Impact Melt - Crater Affiliations (2009) (1)
Powdered rock versus solid rock comparisons in particle‐induced X‐ray emission measurements for planetary geochemical exploration (2020) (1)
Reply: Impacts on Earth in the Late Triassic (1998) (1)
THE NATURE OF THE GROUNDMASS OF SURFICIAL SUEVITES FROM THE RIES IMPACT STRUCTURE, GERMANY. (2003) (1)
Debris Field Kinetics during the Dynamic Fragmentation of Polyphase Natural Ceramic Blocks (2013) (1)
IMPLICATIONS OF THE UNUSUALLY HIGH PROJECTILE COMPONENT AT EAST CLEARWATER CRATER AND THE ABSENCE OF AN IMPACTOR SIGNATURE AT WEST CLEARWATER (2017) (0)
Quartz-Coesite-Stishovite Relations in Shock Veins from the Vredefort Impact Structure (2010) (0)
Laser Fusion 40 Ar- 39 Ar Dating of Pseudotachylites from the Vredefort Impact Structure: New Evidence for a Major Formation Event at 2.0 GA (1994) (0)
Experimental high strain-rate deformation products of carbonate-silicate rocks: Comparison with terrestrial impact materials (2008) (0)
Late Paleocene Spherules from the North Sea: Probable Sea Floor Precipitates --- A Silverpit Provenance Unproven (2004) (0)
SHOCKED QUARTZ AS AN INDICATOR OF THE LOADING AND RELAXATION CONDITIONS DURING AND AFTER HYPERVELOCITY IMPACT - MICROSTRUCTURAL EVIDENCE FROM CRYSTALLINE TARGET ROCKS OF THE CHARLEVOIX IMPACT STRUCTURE, CANADA. (2003) (0)
Abstract: Differentiation processes within the Manicouagan impact melt sheet, Quebec (2011) (0)
MSL-Relevant Geologic Field Trip to Northern Ontario, Canada: The Sudbury Impact Structure and Huronian Supergroup (2018) (0)
A comparison of the chemistry of pseudotachylyte breccias in the Archean Levack Gneisses of the Sudbury structure, Ontario (1992) (0)
Micro-scale energy dissipation mechanisms during fracture in natural polyphase ceramic blocks (2016) (0)
Differential Stress-controlled Deformation of Quartz During and After Hypervelocity Impact — Microstructural Evidence from the Charlevoix Impact Structure, Quebéc, Canada (2003) (0)
Cover Image (2020) (0)
Abstract: Shock metamorphic minerals in the Popigai impact structure, Siberia (2001) (0)
Role of Heat Treatment on the Texture Evolution of M789 Steel Developed by LPBF Process (2022) (0)
The Manicouagan impact crater: Shallow and deep structure considerations (2011) (0)
Abstract: The amazing geology of Mars (2006) (0)
Extreme isotopic heterogeneity in impact melt rocks: Implications for Martian meteorites (2023) (0)
Lunar Impact-fluidized Dikes: Evidence from Apollo 17 Station 7, Taurus-Littrow Valley (2006) (0)
ELEMENTAL COMPOSITION AND CHEMICAL EVOLUTION OF SEDIMENTARY ROCKS IN GALE CRATER, MARS: APXS RESULTS FROM THE FIRST 25 KM OF THE ROVER CURIOSITY’S TRAVERSE (2021) (0)
Abstract: Type and nature of sulphides in the Whistle-Parkin Offset Dyke, Sudbury impact structure, Ontario, Canada (2001) (0)
Erin L. Walton (1978–2022) (2022) (0)
A Small Surface-Based Infrared Spectrometer for the Exploration of the Moon and Other Planetary Bodies (2009) (0)
Pressure-Temperature-Time Relations for Shock Vein and Melt Pocket Generation: An Example from the Moon (2019) (0)
The Dependence of Target Properties Upon Fresh Crater Morphologies on Mars (2003) (0)
Lunar Granulitic Breccias: Differences Between Apollo and Meteorite Samples (2009) (0)
Electronic poster: chroma: a new management interface for lustre (2011) (0)
The Murray formation , Gale crater , Mars : APXS compositional analysis reveals element gains and losses and multiple diagenetic events (2020) (0)
Serbian exchange (1981) (0)
Geological Models for the Uppermost Martian Crust (2004) (0)
LUMINESCENCE AND MICRO-RAMAN OF METEORITES AND SHOCK METAMORPHISM 9:45 a.m. Rocasolano Hall (2011) (0)
STRUCTURAL AND MORPHOMETRIC CONTROLS ON THE ORIGINAL FORM OF THE GALE IMPACT STRUCTURE : TERRESTRIAL CONSTRAINTS FROM VREDEFORT , CHICXULUB , AND SUDBURY (2019) (0)
The Viability of Apatite as an Impact Chronometer: The Manicouagan Impact Structure as a Chronologic Standard (2019) (0)
Abstract: The Foy Offset Dike, Sudbury impact structure, Ontario, Canada (2001) (0)
Abstract: Structural and alteration history of a small gold deposit formed during D3 mylonitic deformation, Buffalo mine, Red Lake, Ontario (1998) (0)
Characteristics of the Frood-Stobie pseudotachylyte belt, Sudbury impact structure (1997) (0)
Abstract: Metamorphic Processes in the Upper Mantle Exemplified by Alpine-Type Peridotites (1987) (0)
Three Essays in Firms, Trade and Development (2020) (0)
Terrestrial Multiple Impact Events (2001) (0)
CLUPI, a high-performance Imaging System on the rover of theExoMars Mission 2020 to doscover biofabrics on MARS. Science objectives and development status (2018) (0)
Comparisons of Unconsolidated Sediments Analyzed by APXS (MSL-Curiosity) within Gale Crater, Mars: Soils, Sands of the Barchan and Linear Dunes of the Active Bagnold Dune Field, and Ripple-field Sands. (2017) (0)
Micro-Raman spectroscopy and electron microscopy of shock veins in metaquartzites from the Vredefort impact structure: controls on coesite and stishovite genesis (2009) (0)
The Nicholson Lake Impact Structure: Shock Features and Age of Formation (2017) (0)
Impact- and Friction-generated Dykes of the Sudbury Impact Structure: Windows into Excavation and Modification Stage Processes (2001) (0)
The Manicouagan Impact Melt Sheet: Identification of Protoliths and Degree of Initial Mixing and Heterogeneity (2016) (0)
Export transitions , productivity , and the supply chain Assessing the influence of EAC trade costs reductions in exports and export supply chains (2018) (0)
WIDER Working Paper 2017/12-Industries without smokestacks in Uganda and Rwanda (2017) (0)
Shatter Cones, Shock Attenuation and Feldspars: Manicouagan Impact Structure, Canada (2016) (0)
CLUPI : Close-Up Imager on EXOMARS Rover J. (2007) (0)
Exhumation of Deep-Level Metamorphic Rocks: A Window into the Ancient Lunar Crust (2005) (0)
THE MARTIAN SHERGOTTITES BE FROM AN IMPACT MELT SHEET ? (2022) (0)
Abstract: Mechanisms of lithification of lunar breccias (2002) (0)
Viscosity determinations of some frictionally generated silicate melts: Implications for slip zone rheology during impact-induced faulting (1992) (0)
Profile of the Differentiated Manicouagan Impact Melt Sheet — Geochemistry, Mineralogy, Petrography, and Isotope Analysis (2018) (0)
Dynamic Fragmentation of Planetary Materials: Sup-Hypervelocity Ejecta Measurements and Velocity Scaling during Impact Testing (2013) (0)
Modeling the pressure–temperature–time evolution of in situ shock veins: A terrestrial case study from Vredefort (2022) (0)
Lunar Granulitic Impactites: Constraints on Their Mineralogy, Petrology, and Chronology (2007) (0)
Abstract: The role of offset dykes in complex crater formation; the Sudbury example (2002) (0)
DRAFT Industries without smokestacks in Uganda and Rwanda (2016) (0)
HIGH STRAIN-RATE DEFORMATION EXPERIMENTS ON CARBONATE-SILICATE ROCKS: IMPLICATIONS FOR IMPACT CRATERING PROCESSES (2007) (0)
Meteorite Impact Craters of North America (2006) (0)
COMPLEX CRATER FORMATION A ND COLLAPSE: OBSERVATIONS AT THE HAUGHTON IMPACT STRUCTURE, ARCTIC CANADA (2003) (0)
A Two-Stage Approach for Predicting Composition from Microscopic Images: Examples from the Mars Exploration Rovers Spirit and Opportunity (2011) (0)
Compositional Trends Within the Murray formation, from the Base of Pahrump Hills to the End of the VRR Campaign, as Determined by APXS (2019) (0)
The Canadian NASA Regional Planetary Image Facility: Impact Cratering and Shock Processes (2016) (0)
A Role for Superplasticity in Impact Structure Formation (2019) (0)
...but the leaders may not be nurses: Jean Spray says nurses may be too locked into the old medical models to lead a primary healthcare revolution (1997) (0)
Dynamic Fragmentation of Planetary Materials: Length Scale Quantification and Semi-Analytical Modelling (2013) (0)
Delimitation of Terrestrial Impact Craters via Pseudotachylitic Rock Distribution (1993) (0)
SHOCK VEINS IN THE CENTRAL UPLIFT OF THE MANICOUAGAN IMPACT STRUCTURE. Marc B. (2010) (0)
Can index based insurance reduce the vulnerability of farmers to weather (2016) (0)
THE CHARLEVOIX IMPACT STRUCTURE ( QUEBEC , CANADA ) – A TOUGH NUT TO CRACK IN 40 Ar / 39 Ar GEOCHRONOLOGY (2009) (0)
Helping health. (1996) (0)
MARS’S MISSING MELT SHEETS: ARE THEY HIDDEN WITHIN OUR SHERGOTTITE COLLECTION? (2022) (0)
SOILS, EOLIAN DUNE SANDS AND MEGA-RIPPLE SANDS IN GALE CRATER, MARS (2018) (0)
Mechanisms of In Situ Rock Displacement During Hypervelocity Impact: Field and Microscopic Observations (2003) (0)
Delimitation of terrestrial impact craters by way of pseudotachylytic rock distribution (1993) (0)
Helping health: Jean Spray of the health education authority, says nurses play a central role in health promotion (1996) (0)
Experimental Hypervelocity Impact of Anorthosite at 1 . 8 to 6 . 7 km / s : Ejecta Parameters , Crater Shapes and Shock Effects (0)
Abstract: Investigation of integrated geologic and geophysical data using GIS: Crooked Creek and Decaturville impact structures, Missouri (2000) (0)
Abstract: A Review of Metamorphic Processes Affecting Alpine-Type Peridotites (1987) (0)
Impact Failure of Planetary Materials: (2013) (0)
3D Investigation of the Gale Impact Structure: A Geological Overview (2013) (0)
Ca-Metasomatism in Crystalline Target Rocks from the Charlevoix Structure, Quebec, Canada: Evidence for Impact-related Hydrothermal Activity (2004) (0)
Stishovite in Shock Veins Within Manicouagan Impact Structure (2012) (0)
Deformation quantification during impact testing of mild steel for velocities of 1 to 3 km/s (2013) (0)
Hypervelocity impact of anorthosite: Excavation, spallation and crater reconstruction (2021) (0)
Natural Shock Sintering of Unconsolidated Planetary Materials (2006) (0)
Effect of Strain Rate on the Columnar to Equiaxed Transition in an As-Cast Medium-Carbon Low-Alloy Steel during Hot Deformation (2019) (0)
CHILLING EVIDENCE FOR THE BULK COMPOSITION OF THE IMPACT MELT SHEET AT SUDBURY: EVIDENCE FROM OFFSET DYKES (2003) (0)
Microanalysis of Melt Pockets within Martian Meteorite DaG 476 (2010) (0)
Deformation quantification in steel plates following impact at a velocity of 2.6 km/s (2014) (0)
BASALTIC SOIL VERSUS DUNE SEDIMENTS ON MARS : A COMPOSITIONAL ANALYSIS OF SURFICIAL SEDIMENTS BY APXS . (2019) (0)
CHARACTERIZATION OF SHOCK METAMORPHISM BY CL AND MICRO-RAMAN TECHNIQUES 3:10 p.m. (2009) (0)
Friction Melting Mechanics: Experimental Evidence Relevant to Impact Cratering (2007) (0)
Diachroneity of the Clearwater West and Clearwater East Impact Structures Supported by (U-Th)/He Dating (2015) (0)
Shock-Induced Melt Pocket Formation in NWA 4468: Evidence for Phase Transformation-Induced Implosion (2011) (0)
Hydrothermal alteration at the basalt‐hosted Vista Alegre impact structure, Brazil (2021) (0)
HP-HT EXCURSIONS AND FALSE BULK SHOCK READINGS: CONSTRAINTS ON ATTENUATION RATE (2012) (0)
Central Uplift Structure Revealed by Deep Drilling at Manicouagan (2007) (0)
Temporal Changes of River Surface Microlayer Characteristics during Dry to Wet Season Transition in Tropical rainforest of Guyana (2019) (0)
A Marine Magnetic Study of the Ile Rouleau Impact Structure, Lake Mistassini, Quebec, Canada (2007) (0)
Strengthening mechanisms in a new precipitation hardening stainless steel fabricated by laser powder bed fusion (2022) (0)
PRESSURE-TEMPERATURE-TIME CONSTRAINTS FOR SHOCK VEIN DEVELOPMENT: A CASE STUDY AT VREDEFORT (2021) (0)
Microstructural evidence of impact-induced crystal- plastic deformation and post- shock annealing of quartz Vortrag (2006) (0)
SHOCK MELTING: THE IMPORTANCE OF CAVITATION (2002) (0)
Impact Structures of Canada: By Richard A.F. Grieve. GT 5, Geological Association of Canada, c/o Department of Earth Sciences, Memorial University, St. John's, Newfoundland & Labrador, Canada A1B 3X5. 219 p., hardcover, 2006. CDN $60. ISBN 1 897095 11 2 (2007) (0)
Shock-generated Melt Networks in Anorthositic Target Rocks from the Manicouagan Impact Structure (2005) (0)

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