Kenneth Raymond Ludwig

Kenneth Raymond Ludwig's AcademicInfluence.com Rankings

Earth Sciences

#1321

World Rank

#1943

Historical Rank

earth-sciences Degrees

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Earth Sciences

Kenneth Raymond Ludwig's Degrees

PhD Geology University of California, Berkeley
Masters Geology University of California, Berkeley
Bachelors Geology University of California, Berkeley

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Kenneth Raymond Ludwig'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

User's Manual for Isoplot 3.00 - A Geochronological Toolkit for Microsoft Excel (2003) (7795)
ISOPLOT; a plotting and regression program for radiogenic-isotope data; version 2.53 (1991) (919)
Joint determination of 40K decay constants and 40Ar∗/40K for the Fish Canyon sanidine standard, and improved accuracy for 40Ar/39Ar geochronology (2010) (795)
A test for systematic errors in 40Ar/39Ar geochronology through comparison with U/Pb analysis of a 1.1-Ga rhyolite (2000) (733)
On the Treatment of Concordant Uranium-Lead Ages (1998) (693)
Calculation of uncertainties of U-Pb isotope data (1980) (637)
Age and Timing of the Permian Mass Extinctions: U/Pb Dating of Closed-System Zircons (2004) (577)
Continuous 500,000-Year Climate Record from Vein Calcite in Devils Hole, Nevada (1992) (532)
Response to the comment by W.H. Schwarz et al. on Joint determination of 40K decay constants and 40 (2011) (511)
Stratigraphic, chronological and behavioural contexts of Pleistocene Homo sapiens from Middle Awash, Ethiopia (2003) (377)
Call for an improved set of decay constants for geochronological use (2001) (340)
for the Fish Canyon sanidine standard, and improved accuracy for 40 Ar/ 39 Ar geochronology (2010) (281)
Duration and Structure of the Past Four Interglaciations (1997) (264)
Mass-Spectrometric 230Th-234U-238U Dating of the Devils Hole Calcite Vein (1992) (224)
Calculation of 230ThU isochrons, ages, and errors (1994) (223)
Refined Proterozoic evolution of the Gawler Craton, South Australia, through U-Pb zircon geochronology (1988) (210)
Mathematical–Statistical Treatment of Data and Errors for 230Th/U Geochronology (2003) (202)
Timing of the Permian–Triassic biotic crisis: implications from new zircon U/Pb age data (and their limitations) (2001) (200)
PBDAT for MS-DOS; a computer program for IBM-PC compatibles for processing raw Pb-U-Th isotope data, version 1.00a (1988) (177)
Dating fluvial terraces by 230Th/U on pedogenic carbonate, Wind River Basin, Wyoming (2003) (160)
Dating of the basal aurignacian sandwich at Abric Romaní (Catalunya, Spain) by radiocarbon and Uranium-Series (1994) (148)
ISOPLOT for MS-DOS, a plotting and regression program for radiogenic-isotope data, for IBM-PC compatible computers, version 1.00 (1988) (148)
Crustal subsidence rate off Hawaii determined from 234U/238U ages of drowned coral reefs (1991) (143)
Uranium-series dating of pedogenic silica and carbonate, Crater Flat, Nevada (2002) (141)
Thorium-230 Ages of Corals and Duration of the Last Interglacial Sea-Level High Stand on Oahu, Hawaii (1994) (133)
Sea-level records at ∼ 80 ka from tectonically stable platforms: Florida and Bermuda (1996) (125)
The Archaeology of Aduma Middle Stone Age Sites in the Awash Valley, Ethiopia (2005) (111)
Absolute Ages Aren't Exactly (1998) (100)
Strontium-isotope stratigraphy of Enewetak Atoll (1988) (88)
Devils Hole, Nevada, δ 18O record extended to the mid-Holocene (2006) (86)
Decay constant errors in U–Pb concordia-intercept ages (2000) (85)
Lead-isotope inhomogeneity in Precambrian igneous K-feldspars (1977) (83)
Chaotic deposition by a giant wave, Molokai, Hawaii (1994) (81)
Paleoclimatic Inferences from a 120,000-Yr Calcite Record of Water-Table Fluctuation in Browns Room of Devils Hole, Nevada (1994) (79)
The Schwartzwalder uranium deposit; II, Age of uranium mineralization and lead isotope constraints on genesis (1985) (75)
Isotopic constraints on the genesis of base-metal ores in southern and central Sardinia (1989) (62)
234U/238U evidence for local recharge and patterns of ground-water flow in the vicinity of Yucca Mountain, Nevada, USA (2002) (62)
Geochronology of Precambrian granites and associated U-Ti-Th mineralization, northern Olary province, South Australia (1984) (59)
Age of uranium mineralization at the Jabiluka and Ranger deposits, Northern Territory, Australia; new U-Pb isotope evidence (1987) (52)
Paleontological investigations at the Eocene locality of Mahenge in north-‐central Tanzania, East Africa (2001) (52)
Coral ages and island subsidence, Hilo drill hole (1996) (51)
ISOPLOT200; a plotting and regression program for isotope geochemists, for use with HP Series 200 computers (1985) (49)
Subsidence and volcanism of the Haleakala Ridge, Hawaii (1990) (48)
Berriasian (Early Cretaceous) radiometric ages from the Grindstone Creek Section, Sacramento Valley, California (1990) (47)
Uranium-daughter migration and U/Pb isotope apparent ages of uranium ores, Shirley Basin, Wyoming (1978) (46)
Effect of initial radioactive-daughter disequilibrium on U-Pb isotope apparent ages of young minerals (1977) (44)
A cool eastern Pacific Ocean at the close of the Last Interglacial complex (2006) (40)
U-Pb isotope systematics and apparent ages of uranium ores, Ambrosia Lake and Smith Lake districts, Grants mineral belt, New Mexico (1984) (40)
A computer program to convert raw Pb-U-Th isotope ratios to blank-corrected isotope ratios and concentrations, with associated errors and error-correlations (1982) (34)
Uranium-lead isotope systematics and apparent ages of zircons and other minerals in precambrian granitic rocks, Granite Mountains, Wyoming (1978) (34)
Geochronology on the paleoanthropological time scale (2000) (34)
PBDAT200; a computer program for processing raw Pb-U-Th isotope data (1985) (34)
Plotting and regression programs for isotope geochemists, for use with HP-86/87 microcomputers (1983) (33)
U-Pb isotope systematics and age of uranium mineralization, Midnite mine, Washington. (1981) (33)
Geochronology of hydrothermal uranium deposits and associated igneous rocks in the eastern source area of the Mount Belknap Volcanics, Marysvale, Utah (1982) (31)
Eliminating mass-fractionation effects on U-Pb isochron ages without double spiking (2001) (30)
et al . on “ Joint determination of 40 K decay constants and 40 Ar * / 40 K for the Fish Canyon sanidine standard , and improved accuracy for 40 Ar / 39 Ar geochronology ” by (2011) (30)
U-Pb dating of uranium deposits in collapse breccia pipes of the Grand Canyon region (1992) (27)
U-Pb ages of uraniferous opals and implications for the history of beryllium, fluorine, and uranium mineralization at Spor Mountain, Utah (1980) (25)
Optimization of multicollector isotope-ratio measurement of strontium and neodymium (1997) (24)
Comment on “Precise K–Ar, 40Ar–39Ar, Rb–Sr and U–Pb mineral ages from the 27.5 Ma Fish Canyon Tuff reference standard” by M.A. Lanphere and H. Baadsgaard (2003) (23)
Age of uranium mineralization in the Gas Hills and Crooks Gap districts, Wyoming, as indicated by U-Pb isotope apparent ages (1979) (16)
ISOPLOT version 2; a plotting and regression program for isotope geochemists, for use with HP series 200/300 computers (1988) (16)
Distribution of Precambrian mafic intrusives penetrating some Archean rocks of western North America (1989) (14)
Sr-Isotope Record of Quaternary Marine Terraces on the California Coast and off Hawaii (1992) (14)
The chronology for the d18O record from Devils Hole, Nevada, extended into the Mid-Holocene (2011) (14)
Data from Devils Hole Core DH-11 (1997) (13)
Coexisting coffinite and uraninite in some sandstone-host uranium ores of Wyoming (1980) (13)
Uranium-lead isochron age and preliminary sulfur isotope systematics of the Felder uranium deposit, south Texas (1982) (13)
Errors of isotope ratios acquired by double interpolation (2009) (12)
Paleozoic age of the Capo Spartivento Orthogneiss, Sardinia, Italy (1989) (12)
Comment and Reply on "Strontium-isotope stratigraphy of Enewetak Atoll" (1989) (12)
Early Precambrian basic rocks of the USA (1990) (11)
Programs for filing and plotting U-Pb isotope data for concordia diagrams, using an HP-9830 computer and HP-9862 plotter (1982) (11)
U-Pb ages of uranium ores in the Churchrock uranium district, New Mexico (1982) (11)
U-Pb isochron age and Pb isotope systematics of the Golden Fleece vein; implications for the relationship of mineralization to the Lake City Caldera, western San Juan Mountains, Colorado (1985) (11)
U.S. Atlantic Coastal Plain Late Quaternary Geochronology: TIMS U-series Coral Dates Continue to Indicate 80 Kyr Sea Level at or Above Present (1997) (10)
GEOCHEMISTRY OF VOLCANIC ROCKS IN THE MARYSVALE VOLCANIC FIELD, WEST-CENTRAL UTAH (1998) (10)
Applicability of La-Ce Systematics to Planetary Samples: Preliminary Results and Evaluation (1984) (9)
Last interglacial in Devils Hole (1993) (9)
Direct U-Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico: COMMENT (2012) (8)
Geologic map, petrochemistry, and geochronology of the Precambrian rocks of the Fletcher Park-Johnson Mountain area, Albany and Platte counties, Wyoming (1995) (8)
Evolution of volcanic rocks and associated ore deposits in the Marysvale volcanic field, Utah (1994) (8)
A program in Hewlett-Packard BASIC for X-Y plotting and line-fitting of isotopic and other data (1979) (7)
UISO; a program for calculation of 230Th-234U-238U isochron ages (1993) (7)
Age of uranium mineralization at the Highland Mine, Powder River basin, Wyoming, as indicated by U-Pb isotope analyses (1983) (7)
PBDAT; a program for reduction of Pb-U-Th isotope data, for use with HP-86/87 microcomputers (1984) (6)
Inherited zircons in the Mundi Mundi Granite, Broken Hill, New South Wales (1985) (5)
Precambrian geology of the central Mazatzal Mountains, Arizona. Lead isotope heterogeneity in Precambrian igneous feldspars (1974) (5)
Pleistocene apparent ages by U-Pb isotope and U-series methods for uranium ore in Dakota Sandstone near Gallup, New Mexico (1977) (5)
User's manual for ANALYST; a computer program for control of an Isomass 54E thermal-ionization, single-collector mass-spectrometer (1985) (4)
Intercalibration of the U-Pb and 40Ar/39Ar geochronometers: Status, prognosis, and proscription (2005) (4)
Age of uranium mineralization, U-Pb isotope systematics, and ore mineralogy of the Midnite Mine, Washington (1980) (3)
Constraints on the timing of the Permian-Triassic biotic crisis: New U/Pb zircon-ages (2001) (3)
Implications of Pre-eruptive Zircon Saturation in Silicic Magmas for High-Precision U/Pb Geochronology (2006) (2)
Age of uranium ores at Ranger and Jabiluka unconformity vein deposits, Northern Territory, Australia (1985) (2)
Uranium-Lead Isotope Apparent Ages of Pitchblendes, Shirley Basin, Wyoming: ABSTRACT (1975) (2)
User's manual for ANALYST version 2.00; An IBM-PC computer program for control of a thermal-ionization, single-collector mass-spectrometer (1992) (2)
Anomalous groundwater 234U/238U beneath Yucca Mountain: Evidence for local recharge? (1998) (2)
Fission-track dating applied to uranium mineralization (1980) (2)
A computer program in Hewlett-Packard BASIC for plotting and processing U-Pb isotope data on concordia diagrams (1979) (2)
History of sulfidization of the Felder uranium deposit, south Texas (1980) (2)
Programs for filing and X-Y plotting of isotopic and other data using an HP-9830 computer and HP-9862 plotter (1982) (1)
Geologic map, petrochemistry, and geochronology of the Precambrian rocks of the Bull Camp Peak Quadrangle, Albany County, Wyoming (1998) (1)
²³ 4 U/²³ 8 U as a Ground-Water Tracer, SW Nevada-SE California (1993) (1)
Comment on ‘Determination of the Radiocarbon Age of Parchment of the Vinland Map’ (2002) (1)
Solutions for apparent ages and U-Pb isotope ratios of young systems without initial secular equilibrium: a computer program in Hewlett-Packard BASIC (1979) (1)
History of Sulfidization of South Texas Roll-Type Uranium Deposit: ABSTRACT (1980) (1)
234U/238U as a ground-water tracer, SW Nevada-SE California (1993) (1)
Sr-Isotopic Variation in the Quaternary: The Record from Glacial and Interglacial Marine Terraces: ABSTRACT (1990) (0)
Comment and Reply on “Sm-Nd direct dating of the Collins Bay hydrothermal uranium deposit, Saskatchewan”COMMENT (1985) (0)
User's guide to DBATIB; a computer program for operations of a micromass isomass 54E mass-spectrometer (1982) (0)
Program list of ANALYST, a computer program for control of an Isomass 54E thermal-ionization, single-collector mass-spectrometer (1985) (0)
Absolute age of disseminated uraninite in Wheeler Basin, Grand County, Colorado (1975) (0)
Comment on “High Resolution Paleotemperature Proxy Record for the Last Interglaciation Based on Norwegian Speleothems” by Stein-Erik Lauritzen (1996) (0)
Sagacious scientific sleuthing solves salting saga (1980) (0)
Programs in Hewlett-Packard BASIC for storing, retrieving, and plotting rare-earth element data for geochemical studies, using HP-9831/9872 desk top computers and plotters (1979) (0)
A GENERALIZED PROGRAM IN HEWLETT-PACKARD BASIC FOR CREATING, EDITING, AND PRINTING OUT DATA FILES FOR GEOCHEMICAL APPLICATIONS (1979) (0)
An IBM-PC Computer Program for Control of a Thermal-lonization, Single-Collector Mass-Spectrometer (1992) (0)
Annealing plus chemical abrasion: A remarkably effective tool for eliminating the effects of lead loss from volcanic zircons (2003) (0)
Limitations on genesis of uranium ores, Midnite Mine, Washington, based on lead-uranium ages (1979) (0)
LETTER TO THE EDITOR Reply to: “Comment on ‘High Resolution Paleotemperature Proxy Record for the Last Interglaciation Based on Norwegian Speleothems’ ” (1996) (0)
U-Pb isotope dates of uraniferous opals associated with beryllium-fluorine-uranium mineralization, Spor Mountain, Utah (1979) (0)
Comment and Reply (2012) (0)

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What Schools Are Affiliated With Kenneth Raymond Ludwig?

Kenneth Raymond Ludwig is affiliated with the following schools:

University of California, Berkeley