J. William Schopf - Publications

Affiliations: 
Geology University of California, Los Angeles, Los Angeles, CA 
Website:
http://epss.ucla.edu/people/faculty/594/

95 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2017 Schopf JW, Kitajima K, Spicuzza MJ, Kudryavtsev AB, Valley JW. SIMS analyses of the oldest known assemblage of microfossils document their taxon-correlated carbon isotope compositions. Proceedings of the National Academy of Sciences of the United States of America. PMID 29255053 DOI: 10.1073/pnas.1718063115  0.56
2015 Schopf JW, Kudryavtsev AB, Walter MR, Van Kranendonk MJ, Williford KH, Kozdon R, Valley JW, Gallardo VA, Espinoza C, Flannery DT. Reply to Dvořák et al.: Apparent evolutionary stasis of ancient subseafloor sulfur cycling biocoenoses. Proceedings of the National Academy of Sciences of the United States of America. 112: E2560. PMID 25902537 DOI: 10.1073/pnas.1503754112  0.8
2015 Schopf JW, Kudryavtsev AB, Walter MR, Van Kranendonk MJ, Williford KH, Kozdon R, Valley JW, Gallardo VA, Espinoza C, Flannery DT. Sulfur-cycling fossil bacteria from the 1.8-Ga Duck Creek Formation provide promising evidence of evolution's null hypothesis. Proceedings of the National Academy of Sciences of the United States of America. 112: 2087-92. PMID 25646436 DOI: 10.1073/pnas.1419241112  0.8
2015 Chan VB, Vinn O, Li C, Lu X, Kudryavtsev AB, Schopf JW, Shih K, Zhang T, Thiyagarajan V. Evidence of compositional and ultrastructural shifts during the development of calcareous tubes in the biofouling tubeworm, Hydroides elegans. Journal of Structural Biology. 189: 230-7. PMID 25600412 DOI: 10.1016/j.jsb.2015.01.004  0.8
2014 Cady LP, Brack A, Bueno Prieto JE, Cockell C, Horneck G, Kasting JF, Lineweaver CH, Raulin F, Schopf JW, Sleep N, von Bloh W, Westall F, Deamer D, Lehman N, Pérez-Mercader J. Where do we go from here? Astrobiology editorial board opinions. Astrobiology. 14: 629-44. PMID 25102138 DOI: 10.1089/ast.2014.1405  0.8
2014 Schopf JW. Geological evidence of oxygenic photosynthesis and the biotic response to the 2400-2200 Ma "great Oxidation Event" Biochemistry (Moscow). 79: 165-177. PMID 24821442 DOI: 10.1134/S0006297914030018  0.8
2014 Kupriyanova EK, Vinn O, Taylor PD, Schopf JW, Kudryavtsev AB, Bailey-Brock J. Serpulids living deep: Calcareous tubeworms beyond the abyss Deep-Sea Research Part I: Oceanographic Research Papers. 90: 91-104. DOI: 10.1016/j.dsr.2014.04.006  0.8
2013 Shi CS, Schopf JW, Kudryavtsev AB. Characterization of the stem anatomy of the Eocene fern Dennstaedtiopsis aerenchymata (Dennstaedtiaceae) by use of confocal laser scanning microscopy. American Journal of Botany. 100: 1626-40. PMID 23926220 DOI: 10.3732/ajb.1300027  0.56
2013 Shi CS, Schopf JW, Kudryavtsev AB. Characterization of the stem anatomy of the Eocene fern Dennstaedtiopsis aerenchymata (Dennstaedtiaceae) by use of confocal laser scanning microscopy American Journal of Botany. 100: 1626-1640. DOI: 10.3732/ajb.1300027  0.8
2013 Schopf JW, Kudryavtsev AB. Reply to the comments of D.L. Pinti, R. Mineau and V. Clement, and of A.O. Marshall and C.P. Marshall on "Biogenicity of Earth's earliest fossils: A resolution of the controversy" by J. William Schopf and Anatoliy B. Kudryavtsev, Gondwana Research 22 (2012), 761-771 Gondwana Research. 23: 1656-1658. DOI: 10.1016/j.gr.2012.12.005  0.8
2013 Williford KH, Ushikubo T, Schopf JW, Lepot K, Kitajima K, Valley JW. Preservation and detection of microstructural and taxonomic correlations in the carbon isotopic compositions of individual Precambrian microfossils Geochimica Et Cosmochimica Acta. 104: 165-182. DOI: 10.1016/j.gca.2012.11.005  0.8
2013 Shen-Miller J, Aung LH, Turek J, Schopf JW, Tholandi M, Yang M, Czaja A. Centuries-Old Viable Fruit of Sacred Lotus Nelumbo nucifera Gaertn var. China Antique Tropical Plant Biology. 6: 53-68. DOI: 10.1007/s12042-013-9125-1  0.8
2013 Schopf JW. The fossil record of cyanobacteria Ecology of Cyanobacteria Ii: Their Diversity in Space and Time. 15-36. DOI: 10.1007/978-94-007-3855-3_2  0.8
2012 Schopf JW, Farmer JD, Foster IS, Kudryavtsev AB, Gallardo VA, Espinoza C. Gypsum-permineralized microfossils and their relevance to the search for life on Mars. Astrobiology. 12: 619-33. PMID 22794252 DOI: 10.1089/ast.2012.0827  0.8
2012 Schopf JW, Kudryavtsev AB. Biogenicity of Earth's earliest fossils: A resolution of the controversy Gondwana Research. 22: 761-771. DOI: 10.1016/j.gr.2012.07.003  0.8
2011 Schopf JW. Pioneers of astrobiology. J. William Schopf. Astrobiology. 11: 9-14. PMID 21294675  0.8
2011 Schopf JW. The paleobiological record of photosynthesis Photosynthesis Research. 107: 87-101. PMID 20607406 DOI: 10.1007/s11120-010-9577-1  0.8
2011 Cohen PA, Schopf JW, Butterfield NJ, Kudryavtsev AB, Macdonald FA. Phosphate biomineralization in mid-neoproterozoic protists Geology. 39: 539-542. DOI: 10.1130/G31833.1  0.8
2011 Schopf JW, Kudryavtsev AB. Biogenicity of Apex Chert microstructures Nature Geoscience. 4: 346-347. DOI: 10.1038/ngeo1172  0.8
2010 Taylor PD, Vinn O, Kudryavtsev A, Schopf JW. Raman spectroscopic study of the mineral composition of cirratulid tubes (Annelida, Polychaeta) Journal of Structural Biology. 171: 402-405. PMID 20566380 DOI: 10.1016/j.jsb.2010.05.010  0.8
2010 Schopf JW, Kudryavtsev AB, Sergeev VN. Confocal laser scanning microscopy and raman imagery of the late neoproterozoic chichkan microbiota of South Kazakhstan Journal of Paleontology. 84: 402-416. DOI: 10.1666/09-134.1  0.8
2010 Sergeev VN, Schopf JW. Taxonomy, paleoecology and biostratigraphy of the late neoproterozoic chichkan microbiota of South Kazakhstan: The marine biosphere on the eve of metazoan radiation Journal of Paleontology. 84: 363-401. DOI: 10.1666/09-133.1  0.8
2010 Moczydłowska M, Schopf JW, Willman S. Micro- and nano-scale ultrastructure of cell walls in Cryogenian microfossils: Revealing their biological affinity Lethaia. 43: 129-136. DOI: 10.1111/j.1502-3931.2009.00175.x  0.8
2010 Lal D, Schopf JW, Abbott PL, Vacher L, Jull AJT, McHargue L. Nuclear, chemical and biological characterization of formation histories of ironstones from several sites in Southern California: Dominant role of bacterial activity Earth and Planetary Science Letters. 296: 227-234. DOI: 10.1016/j.epsl.2010.05.002  0.8
2009 Schopf JW, Bottjer DJ. World summit on ancient microscopic fossils Precambrian Research. 173: 1-3. DOI: 10.1016/j.precamres.2009.06.001  0.8
2009 Schopf JW, Kudryavtsev AB. Confocal laser scanning microscopy and Raman imagery of ancient microscopic fossils Precambrian Research. 173: 39-49. DOI: 10.1016/j.precamres.2009.02.007  0.8
2009 Schopf JW. The hunt for Precambrian fossils: An abbreviated genealogy of the science Precambrian Research. 173: 4-9. DOI: 10.1016/j.precamres.2009.01.003  0.8
2009 Czaja AD, Kudryavtsev AB, Cody GD, Schopf JW. Characterization of permineralized kerogen from an Eocene fossil fern Organic Geochemistry. 40: 353-364. DOI: 10.1016/j.orggeochem.2008.12.002  0.8
2008 Schopf JW, Tewari VC, Kudryavtsev AB. Discovery of a new chert-permineralized microbiota in the Proterozoic Buxa Formation of the Ranjit window, Sikkim, northeast India, and its astrobiological implications. Astrobiology. 8: 735-746. PMID 18844456  0.8
2008 Taylor PD, Kudryavtsev AB, Schopf JW. Calcite and aragonite distributions in the skeletons of bimineralic bryozoans as revealed by Raman spectroscopy Invertebrate Biology. 127: 87-97. DOI: 10.1111/j.1744-7410.2007.00106.x  0.8
2007 Chen JY, Schopf JW, Bottjer DJ, Zhang CY, Kudryavtsev AB, Tripathi AB, Wang XQ, Yang YH, Gao X, Yang Y. Raman spectra of a Lower Cambrian ctenophore embryo from southwestern Shaanxi, China. Proceedings of the National Academy of Sciences of the United States of America. 104: 6289-92. PMID 17404242 DOI: 10.1073/pnas.0701246104  0.56
2007 McKeegan KD, Kudryavtsev AB, Schopf JW. Raman and ion microscopic imagery of graphitic inclusions in apatite from older than 3830 Ma: Akilia supracrustal rocks, west Greenland: Reply Geology. 35: e170. DOI: 10.1130/G24987Y.1  0.8
2007 McKeegan KD, Kudryavtsev AB, Schopf JW. Raman and ion microscopic imagery of graphitic inclusions in apatite from older than 3830 Ma Akilia supracrustal rocks, west Greenland Geology. 35: 591-594. DOI: 10.1130/G23465A.1  0.8
2007 Schopf JW, Walter MR, Ruiji C. Earliest evidence of life on earth Precambrian Research. 158: 139-140. DOI: 10.1016/j.precamres.2007.05.001  0.8
2007 Schopf JW, Kudryavtsev AB, Czaja AD, Tripathi AB. Evidence of Archean life: Stromatolites and microfossils Precambrian Research. 158: 141-155. DOI: 10.1016/j.precamres.2007.04.009  0.8
2006 Schopf JW. Fossil evidence of Archaean life Philosophical Transactions of the Royal Society B: Biological Sciences. 361: 869-885. PMID 16754604 DOI: 10.1098/rstb.2006.1834  0.8
2006 Czaja AD, Kudryavtsev AB, Schopf JW. New method for the microscopic, nondestructive acquisition of ultraviolet resonance Raman spectra from plant cell walls. Applied Spectroscopy. 60: 352-5. PMID 16613629 DOI: 10.1366/000370206776593753  0.56
2006 Schopf JW, Tripathi AB, Kudryavtsev AB. Three-dimensional confocal optical imagery of precambrian microscopic organisms Astrobiology. 6: 1-16. PMID 16551223 DOI: 10.1089/ast.2006.6.1  0.8
2006 Schopf JW. The first billion years: When did life emerge? Elements. 2: 229-233. DOI: 10.2113/gselements.2.4.229  0.8
2006 Czaja AD, Kudryavtsev AB, Schopf JW. New method for the microscopic, nondestructive acquisition of ultraviolet resonance Raman spectra from plant cell walls Applied Spectroscopy. 60: 352-355. DOI: 10.1366/000370206776593753  0.8
2005 Schopf JW, Kudryavtsev AB, Agresti DG, Czaja AD, Wdowiak TJ. Raman imagery: A new approach to assess the geochemical maturity and biogenicity of permineralized Precambrian fossils Astrobiology. 5: 333-371. PMID 15941380 DOI: 10.1089/ast.2005.5.333  0.8
2005 Schopf JW, Kudryavtsev AB. Three-dimensional Raman imagery of precambrian microscopic organisms Geobiology. 3: 1-12. DOI: 10.1111/j.1472-4669.2005.00044.x  0.8
2005 Kempe A, Wirth R, Altermann W, Stark RW, Schopf JW, Heckl WM. Focussed ion beam preparation and in situ nanoscopic study of Precambrian acritarchs Precambrian Research. 140: 36-54. DOI: 10.1016/j.precamres.2005.07.002  0.8
2004 Schopf JW. Geochemical and submicron-scale morphologic analyses of individual Precambrian microorganisms Geochemical Society Special Publications. 9: 365-375. DOI: 10.1016/S1873-9881(04)80026-9  0.8
2003 Cady SL, Farmer JD, Grotzinger JP, Schopf JW, Steele A. Morphological biosignatures and the search for life on mars Astrobiology. 3: 351-368. PMID 14577884 DOI: 10.1089/153110703769016442  0.8
2003 House CH, Schopf JW, Stetter KO. Carbon isotopic fractionation by Archaeans and other thermophilic prokaryotes Organic Geochemistry. 34: 345-356. DOI: 10.1016/S0146-6380(02)00237-1  0.8
2002 Kempe A, Schopf JW, Altermann W, Kudryavtsev AB, Heckl WM. Atomic force microscopy of Precambrian microscopic fossils. Proceedings of the National Academy of Sciences of the United States of America. 99: 9117-20. PMID 12089337 DOI: 10.1073/pnas.142310299  0.56
2002 Schopf JW, Kudryavtsev AB, Agresti DG, Wdowiak TJ, Czaja AD. Laser-Raman imagery of Earth's earliest fossils Nature. 416: 73-76. PMID 11882894 DOI: 10.1038/416073a  0.8
2002 Shen-Miller J, Schopf JW, Harbottle G, Cao RJ, Ouyang S, Zhou KS, Southon JR, Liu GH. Long-living lotus: Germination and soil γ-irradiation of centuries-old fruits, and cultivation, growth, and phenotypic abnormalities of offspring American Journal of Botany. 89: 236-247.  0.8
2001 Kudryavtsev AB, Schopf JW, Agresti DG, Wdowiak TJ. In situ laser-Raman imagery of precambrian microscopic fossils. Proceedings of the National Academy of Sciences of the United States of America. 98: 823-6. PMID 11158554 DOI: 10.1073/pnas.98.3.823  0.8
2000 House CH, Schopf JW, McKeegan KD, Coath CD, Harrison TM, Stetter KO. Carbon isotopic composition of individual Precambrian microfossils Geology. 28: 707-710. PMID 11543502 DOI: 10.1130/0091-7613(2000)28<707:CICOIP>2.0.CO  0.8
2000 Schopf JW. Solution to Darwin's dilemma: discovery of the missing Precambrian record of life. Proceedings of the National Academy of Sciences of the United States of America. 97: 6947-53. PMID 10860955 DOI: 10.1073/pnas.97.13.6947  0.8
1999 Schopf JW. Deep divisions in the Tree of Life--what does the fossil record reveal? The Biological Bulletin. 196: 351-3; discussion 35. PMID 11536910  0.8
1997 Miller SL, Schopf JW, Lazcano A. Response Journal of Molecular Evolution. 45: 340-1. PMID 9321412  0.64
1997 Miller SL, Schopf JW, Lazcano A. Oparin's "Origin of Life": sixty years later. Journal of Molecular Evolution. 44: 351-3. PMID 9089073  0.6
1997 Miller SL, Schopf JW, Lazcano A. Response Journal of Molecular Evolution. 45: 340-341. DOI: 10.1007/PL00006221  0.8
1996 Fairchild TR, Schopf JW, Shen-Miller J, Guimarães EM, Edwards MD, Lagstein A, Li X, Pabst M, Soares De Melo Filho L. Recent discoveries of Proterozoic microfossils in south-central Brazil Precambrian Research. 80: 125-152.  0.8
1995 Altermann W, Schopf JW. Microfossils from the Neoarchean Campbell Group, Griqualand West Sequence of the Transvaal Supergroup, and their paleoenvironmental and evolutionary implications. Precambrian Research. 75: 65-90. PMID 11542814 DOI: 10.1016/0301-9268(95)00018-Z  0.8
1995 Shen-Miller J, Mudgett MB, Schopf JW, Clarke S, Berger R. Exceptional seed longevity and robust growth: Ancient Sacred Lotus from China American Journal of Botany. 82: 1367-1380.  0.8
1994 Schopf JW. The early evolution of life: solution to Darwin's dilemma. Trends in Ecology & Evolution. 9: 375-7. PMID 11539583 DOI: 10.1016/0169-5347(94)90058-2  0.8
1994 Schopf JW. Disparate rates, differing fates: tempo and mode of evolution changed from the Precambrian to the Phanerozoic. Proceedings of the National Academy of Sciences of the United States of America. 91: 6735-42. PMID 8041691 DOI: 10.1073/pnas.91.15.6735  0.8
1993 Schopf JW. Microfossils of the Early Archean Apex chert: new evidence of the antiquity of life. Science (New York, N.Y.). 260: 640-6. PMID 11539831  0.8
1991 Schopf JW. Collapse of the Late Proterozoic ecosystem. South African Journal of Geology : Being the Transactions of the Geological Society of South Africa = Suid-Afrikaanse Tydskrif Vir Geologie : Syndie Die Verhandelinge Van Die Geologiese Vereniging Van Suid-Afrika. 94: 33-43. PMID 11538702  0.8
1990 Schopf JW. ...and the views of the onlookers [3] Nature. 345: 198.  0.8
1989 Schopf JW. Diversification and extinction in the proterozoic biosphere Origins of Life and Evolution of the Biosphere. 19: 445-446. DOI: 10.1007/BF02388942  0.8
1988 Awramik SM, Schopf JW, Walter MR. Carbonaceous filaments from North Pole, Western Australia: Are they fossil bacteria in archean stromatolites? A discussion Precambrian Research. 39: 303-309. DOI: 10.1016/0301-9268(88)90023-X  0.8
1987 Schopf JW, Packer BM. Early Archean (3.3-billion to 3.5-billion-year-old) microfossils from Warrawoona Group, Australia. Science (New York, N.Y.). 237: 70-3. PMID 11539686  0.8
1987 Klein C, Beukes NJ, Schopf JW. Filamentous microfossils in the early proterozoic transvaal supergroup: their morphology, significance, and paleoenvironmental setting Precambrian Research. 36: 81-94. DOI: 10.1016/0301-9268(87)90018-0  0.8
1984 Nyberg AV, Schopf JW. Microfossils in stromatolitic cherts from the upper proterozoic Min'yar formation, southern Ural Mountains, USSR. Journal of Paleontology. 58: 738-72. PMID 11541991  0.8
1984 Schopf JW, Wei-Qing Z, Zhao-Liang X, Jen H. Proterozoic stromatolitic microbiotas of the 1400-1500 Ma-old Gaoyuzhuang formation near Jixian, northern China. Precambrian Research. 24: 335-49. PMID 11541987 DOI: 10.1016/0301-9268(84)90064-0  0.8
1983 Awramik SM, Schopf JW, Walter MR. Filamentous Fossil Bacteria from the Archean of Western Australia Developments in Precambrian Geology. 7: 249-266. DOI: 10.1016/S0166-2635(08)70251-2  0.8
1981 Bridgwater D, Allaart JH, Schopf JW, Klein C, Walter MR, Barghoorn ES, Strother P, Knoll AH, Gorman BE. Microfossil-like objects from the Archaean of Greenland: A cautionary note Nature. 289: 51-53. DOI: 10.1038/289051a0  0.8
1981 Schopf JW. The Precambrian development of an oxygenic atmosphere United States Geological Survey Professional Paper. 1161: B1-B11.  0.8
1978 Schopf JW. The evolution of the earliest cells. Scientific American. 239: 110-2, 114, 116-20 p. PMID 705320  0.8
1978 Schopf JW, Prasad KN. Microfossils in Collenia-like stromatolites from the proterozoic Vempalle formation of the Cuddapah Basin, India Precambrian Research. 6: 347-366. DOI: 10.1016/0301-9268(78)90022-0  0.8
1978 Chauvel JJ, Schopf JW. Late precambrian microfossils from Brioverian cherts and limestones of Britanny and Normandy, France Nature. 275: 640-642.  0.8
1977 Schopf JW, Dolnik TA, Krylov IN, Mendelson CV, Nazarov BB, Nyberg AV, Sovietov YK, Yakshin MS. Six new stromatolitic microbiotas from the Proterozoic of the Soviet Union Precambrian Research. 4: 269-273,275,277-284. DOI: 10.1016/0301-9268(77)90017-1  0.8
1976 Schopf JW, Oehler DZ. How old are the eukaryotes? Science (New York, N.Y.). 193: 47-9. PMID 17794005 DOI: 10.1126/science.193.4247.47  0.8
1976 Schopf JW. Are the oldest 'fossils', fossils? Origins of Life. 7: 19-36. PMID 967401 DOI: 10.1007/BF01218511  0.8
1975 Schopf JW. The age of microscopic life Endeavour. 34: 51-58.  0.8
1973 Schopf JW, Fairchild TR. Late Precambrian microfossils: A new stromatolitic biota from Boorthanna, South Australia Nature. 242: 537-538. DOI: 10.1038/242537a0  0.8
1972 Oehler DZ, Schopf JW, Kvenvolden KA. Carbon isotopic studies of organic matter in precambrian rocks. Science (New York, N.Y.). 175: 1246-8. PMID 17794201 DOI: 10.1126/science.175.4027.1246  0.8
1971 Oehler JH, Schopf JW. Artificial microfossils: experimental studies of permineralization of blue-green algae in silica. Science (New York, N.Y.). 174: 1229-31. PMID 17806931 DOI: 10.1126/science.174.4015.1229  0.8
1970 Schopf JW. Micropaleontological studies of lunar samples. Science (New York, N.Y.). 167: 779-80. PMID 17781588 DOI: 10.1126/science.167.3918.779  0.8
1970 Smith JW, Schopf JW, Kaplan IR. Extractable organic matter in Precambrian cherts Geochimica Et Cosmochimica Acta. 34: 659-675. DOI: 10.1016/0016-7037(70)90069-4  0.8
1970 Ponnamperuma C, Kvenvolden K, Chang S, Johnson R, Pollock G, Philpott D, Kaplan I, Smith J, Schopf JW, Gehrke C, Hodgson G, Breger IA, Halpern B, Duffield A, Krauskopf K, et al. Search for organic compounds in the lunar dust from the sea of tranquillity Science. 167: 760-762.  0.8
1969 Schopf JW. Recent advances in precambrian paleobiology Grana Palynologica. 9: 147-168. DOI: 10.1080/00173136909436433  0.8
1969 Gutstadt AM, Schopf JW. Possible algal microfossils from the late pre-cambrian of california Nature. 223: 165-167. DOI: 10.1038/223165b0  0.8
1968 Schopf JW, Kvenvolden KA, Barghoorn ES. Amino acids in Precambrian sediments: an assay. Proceedings of the National Academy of Sciences of the United States of America. 59: 639-46. PMID 5238992  0.8
1967 Schopf JW, Barghoorn ES. Alga-like fossils from the early precambrian of South Africa. Science (New York, N.Y.). 156: 508-12. PMID 17730741 DOI: 10.1126/science.156.3774.508  1
1966 Barghoorn ES, Schopf JW. Microorganisms three billion years old from the precambrian of South Africa. Science (New York, N.Y.). 152: 758-63. PMID 17797444 DOI: 10.1126/science.152.3723.758  1
1965 Barghoorn ES, Meinschein WG, Schopf JW. Paleobiology of a Precambrian Shale: Geology, organic geochemistry, and paleontology are applied to the problem of detection of ancient life. Science (New York, N.Y.). 148: 461-72. PMID 17842832 DOI: 10.1126/science.148.3669.461  1
1965 Barghoorn ES, Schopf JW. Microorganisms from the Late Precambrian of Central Australia. Science (New York, N.Y.). 150: 337-9. PMID 17742361 DOI: 10.1126/science.150.3694.337  1
1965 Schopf JW, Barghoorn ES, Maser MD, Gordon RO. Electron microscopy of fossil bacteria two billion years old. Science (New York, N.Y.). 149: 1365-7. PMID 5826530  1
1964 Meinschein WG, Barghoorn ES, Schopf JW. Biological Remnants in a Precambrian Sediment. Science (New York, N.Y.). 145: 262-3. PMID 17833033 DOI: 10.1126/science.145.3629.262  0.8
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