Helen Vaughn Michel

Helen Vaughn Michel's AcademicInfluence.com Rankings

Helen Vaughn Michel

Chemistry

#1376

World Rank

#2074

Historical Rank

#528

USA Rank

chemistry Degrees

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Chemistry

Helen Vaughn Michel's Degrees

Bachelors Chemistry University of California, Berkeley

Why Is Helen Vaughn Michel Influential?

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According to Wikipedia, Helen Vaughn Michel is an American chemist best known for her efforts in fields including analytical chemistry and archaeological science, and specific processes such as neutron activation analysis and radiocarbon dating. Her work with Frank Asaro at the Lawrence Berkeley National Laboratory at the University of California is particularly noteworthy as it includes the dating of Drake's Plate of Brass as well as the Alvarez hypothesis, the hypothesis that posits the Cretaceous–Paleogene extinction event.

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Helen Vaughn Michel'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

Extraterrestrial Cause for the Cretaceous-Tertiary Extinction (1980) (3388)
Spheroids at the Cretaceous-Tertiary boundary are altered impact droplets of basaltic composition (1983) (170)
Impact Theory of Mass Extinctions and the Invertebrate Fossil Record (1984) (146)
Iridium Anomaly Approximately Synchronous with Terminal Eocene Extinctions (1982) (138)
Current status of the impact theory for the terminal Cretaceous extinction (1982) (110)
The End of the Cretaceous: Sharp Boundary or Gradual Transition? (1984) (105)
The Precursor of the Cretaceous-Tertiary Boundary Clays at Stevns Klint, Denmark, and DSDP Hole 465A (1984) (93)
Iridium Anomalies of Late Eocene Age at Massignano (Italy), and ODP Site 689B (Maud Rise, Antarctic) (1993) (85)
Geochemical anomalies near the Eocene/Oligocene and Permian/Triassic boundaries (1981) (55)
Precise Characterization of Guatemalan Obsidian Sources, and Source Determination of Artifacts from Quiriguá (1983) (50)
High-Precision Chemical Characterization of Major Obsidian Sources in Guatemala (1978) (48)
Ecuadorian Obsidian Sources Used for Artifact Production and Methods for Provenience Assignments (1994) (46)
Special Studies: The Obsidian Trade at Isla Cerritos, Yucatán, Mexico (1989) (41)
An Initial Consideration of Obsidian Procurement and Exchange in Prehispanic Ecuador (1994) (41)
COMPARISON OF NEUTRON ACTIVATION ANALYSIS FROM THE LAWRENCE BERKELEY LABORATORY AND THE HEBREW UNIVERSITY (1978) (39)
Provenience Analysis of Obsidians from the Central Peten Lakes Region, Guatemala (1985) (38)
A Lyons branch of the pottery-making firm of Ateius of Arezzo (1975) (36)
Obsidian Sources and Elemental Analyses of Artifacts in Southern Mesoamerica and the Northern Intermediate Area (1990) (27)
Nuclear Applications in Art and Archaeology (1972) (24)
Maya Maritime Trade and Sources of Obsidian at San Juan, Ambergris Cay, Belize (1989) (23)
EXTRATERRESTRIAL CAUSE FOR THE CRETACEOUS-TERTIARY EXTINCTION: EXPERIMENT AND THEORY (1979) (22)
Sources of Obsidian from El Mirador, Guatemala: New Evidence on Preclassic Maya Interaction (1989) (20)
MAYAN OBSIDIAN: SOURCE CORRELATION FOR SOUTHERN BELIZE ARTIFACTS (1978) (18)
The Chipped Stone Industry of Cihuatan and Santa María, El Salvador, and Sources of Obsidian from Cihuatan (1987) (17)
News and Short Contributions (1976) (16)
12. GEOCHEMICAL STUDIES OF THE CRETACEOUS-TERTI ARY BOUNDARY IN ODP HOLES 689B AND 690C 1 (1990) (15)
The Cretaceous/Tertiary boundary at site 738, southern Kerguelen Plateau (1991) (15)
Obsidian Procurement and Distribution in the Tikal-Yaxha Intersite Area of the Central Maya Lowlands (1997) (15)
Sources of Some Obsidian Flakes from a Paleoindian Site in Guatemala (1977) (13)
INTERREGIONAL CONTACTS BETWEEN TELL EN-NASBEH AND LITTORAL PHILISTINE CENTRES IN CANAAN DURING EARLY IRON AGE I* (1994) (11)
SOURCES OF THE QUARTZITE OF SOME ANCIENT EGYPTIAN SCULPTURES (1988) (11)
CHEMICAL COMPOSITION PATTERNS OF CERAMIC, WARES FROM FUSTÄT, EGYPT* (1976) (10)
Does the Different Layout of the Late Bronze Age Tombs at Laish/Dan and Akko in Northern Canaan Reflect Different Trade Relations? An Instrumental Neutron Activation Study on Mycenaean Pottery (1999) (10)
CHEMICAL SOURCE GROUPS IN ECUADORIAN OBSIDIAN (1981) (9)
CHEMICAL STUDY OF THE PLATE OF BRASS (1979) (9)
NEUTRON ACTIVATION ANALYSIS AND THE LOCATION OF WASSUKANNI (1976) (8)
Abundance Profiles of Iridium and Other Elements near the Cretaceous/Tertiary Boundary in Hole 516F of Deep Sea Drilling Project Leg 72 (1983) (8)
Distribution of Iridium and Other Elements near the Cretaceous/Tertiary Boundary in Hole 465A: Preliminary Results (1981) (8)
The Northern Colossus of Memnon: New Slants (1984) (7)
19. GEOCHEMICAL STUDY OF THE CRETACEOUS-TERTIARY BOUNDARY REGION AT HOLE 752B1 (1991) (6)
ELEMENTAL PROFILE OF IRIDIUM AND OTHER ELEMENTS NEAR THE CRETACEOUS / TERTIARY BOUNDARY IN HOLE 577 B 1 (2006) (6)
21. ELEMENTAL PROFILE OF IRIDIUM AND OTHER ELEMENTS NEAR THE CRETACEOUS/TERTIARY BOUNDARY IN HOLE 577B (2006) (6)
MAJOR SOURCES OF ECUADORIAN ARCHAEOLOGICAL OBSIDIAN AND PROVENIENCE ASSIGNMENT OF ARTIFACTS (1981) (5)
38. SUMMARY OF CRETACEOUS/TERTIARY BOUNDARY STUDIES, DEEP SEA DRILLING PROJECT SITE 577, SHATSKY RISE1 (1985) (5)
Asteroid extinction hypothesis. (1981) (5)
On the Origin of a Mycenaean III A Chariot Krater and other Related Mycenaean Pottery from the Tomb 387 at Laish/Dan (by Neutron Activation Analysis) (1992) (4)
Precolumbian Obsidian Trade in the Northern Intermediate Area : Elemental Analysis ofArtifacts From Honduras and Nicaragua (4)
Did the clay minerals at the Cretaceous-Tertiary boundary form from glass? Evidence from Denmark and DSDP hole 465A (1984) (4)
The debate over the Cretaceous-Tertiary boundary (1988) (3)
Provenance studies of Sgraffiato and Late Green Glazed wares from Siraf, Iran (1975) (3)
GEOCHEMICAL STUDY OF THE CRETACEOUS-TERTIARY BOUNDARY REGION AT HOLE 752 B 1 (2006) (3)
RESULTS OF A DATING ATTEMPT -CHEMICAL AND PHYSICAL MEASUREMENTS RELEVANT TO THE CASE OF THE CRETACEOUS TERTIARY EXTINCTIONS (1980) (3)
The Sources of Obsidian for Artifacts from Chobshi Cave, Ecuador (1989) (3)
Element stratigraphy across the Cretaceous-Tertiary boundary in ODP Hole 119-738C (1991) (3)
ELEMENT STRATIGRAPHY ACROSS THE CRETACEOUS / TERTIARY BOUNDARY IN HOLE 738 C 1 (2006) (3)
Possible world-wide middle miocene iridium anomaly and its relationship to periodicity of impacts and extinctions (1988) (2)
Statistical evaluation of some Columbia River basalt chemical analyses (1978) (2)
Quantitative neutron activation analysis of human tissues (1973) (1)
Comment and Reply on “Spheroids at the Cretaceous-Tertiary boundary are altered impact droplets of basaltic composition”REPLY (1984) (1)
ABSOLUTE MEASUREMENT OF THE ENERGY OF $alpha$ PARTICLES EMITTED BY $sup 232$U AND $sup 240$Pu. (1972) (0)
PRECISE CHARACTERIZATION OF GUATEMALAN OBSIDIAN SOURCES, AND SOURCING OBSIDIAN ARTIFACTS FROM QUIRIGUA (1981) (0)
LBNL Correspondence Notebook 1 (2011) (0)
HINDRANCE FACTORS FOR ALPHA DECAY (1960) (0)
Absolute measurement of the energy of $alpha$ particles emitted by $sup 148$Gd (1973) (0)
Response : Asteroid Extinction Hypothesis (1981) (0)
Chemical Characterization of Basalt Flows (1977) (0)
LBNL Ceramic Descriptions Notebook 1 & 2 (2011) (0)
LBNL Received Notebook 8 & 9 (2011) (0)
(Table 3) Oxygen isotope values of clay minerals from the Cretaceous-Tertiary boundary (1984) (0)
ABUNDANCE PROFILES OF IRIDIUM AND OTHER ELEMENTS NEAR THE CRETACEOUS-TERTIARY BOUNDARY IN HOLE 516F OF DSDP LEG 72 (1982) (0)
Continuous measurement of $sup 85$Kr in presence of $sup 45$Ar. (1972) (0)
Geochemical anomalies, bolide impacts and biological extinctions on the Earth (1986) (0)
Iridium Discovery at the Jeptha Knob Cryptoexplosion Structure, Kentucky (1985) (0)
Elemental Analysis of Obsidian Samples from Pacific Nicaragua and from Northwest Costa Rica (2013) (0)
MEASUREMENT OF ELEMENT ABUNDANCES IN PLANKTON BY NEUTRON ACTIVATION ANALYSIS (1981) (0)
The Search for Jeptha Knob Iridium (1987) (0)
LBNL Ceramic Descriptions Notebook: Cyprus (2011) (0)
Society for American Archaeology The Chipped Stone Industry of Cihuatan and Santa Maria, El Salvador, and Sources of Obsidian from Cihuatan Author(s): (2007) (0)
LBNL Received Notebook 5 (2011) (0)

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Helen Vaughn Michel's Academic­Influence.com Rankings