| Year |
Citation |
Score |
| 2022 |
Osterhout JT, Schopf JW, Kudryavtsev AB, Czaja AD, Williford KH. Deep-UV Raman Spectroscopy of Carbonaceous Precambrian Microfossils: Insights into the Search for Past Life on Mars. Astrobiology. 22: 1239-1254. PMID 36194869 DOI: 10.1089/ast.2021.0135 |
0.722 |
|
| 2019 |
Schopf JW, Garcia AK. Application of the apatite oxygen paleobarometer (AOP) across the Neoproterozoic-Cambrian transition Precambrian Research. 105404. DOI: 10.1016/J.Precamres.2019.105404 |
0.322 |
|
| 2019 |
Sergeev VN, Schopf JW, Kudryavtsev AB. Global microfossil changes through the Precambrian-Cambrian phosphogenic event: The Shabakta Formation of the phosphorite-bearing Maly Karatau Range, South Kazakhstan Precambrian Research. 105386. DOI: 10.1016/J.Precamres.2019.105386 |
0.465 |
|
| 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 |
0.406 |
|
| 2017 |
Garcia AK, Schopf JW, Yokobori SI, Akanuma S, Yamagishi A. Reconstructed ancestral enzymes suggest long-term cooling of Earth's photic zone since the Archean. Proceedings of the National Academy of Sciences of the United States of America. PMID 28416654 DOI: 10.1073/Pnas.1702729114 |
0.365 |
|
| 2017 |
Morais L, Fairchild TR, Lahr DJ, Rudnitzki ID, Schopf JW, Garcia AK, Kudryavtsev AB, Romero GR. Carbonaceous and siliceous Neoproterozoic vase-shaped microfossils (Urucum Formation, Brazil) and the question of early protistan biomineralization Journal of Paleontology. 91: 393-406. DOI: 10.1017/Jpa.2017.16 |
0.345 |
|
| 2017 |
Schopf JW, Kudryavtsev AB, Osterhout JT, Williford KH, Kitajima K, Valley JW, Sugitani K. An anaerobic ∼3400 Ma shallow-water microbial consortium: Presumptive evidence of Earth’s Paleoarchean anoxic atmosphere Precambrian Research. 299: 309-318. DOI: 10.1016/J.Precamres.2017.07.021 |
0.39 |
|
| 2016 |
Taylor PD, Shau-Hwai AT, Kudryavstev AB, Schopf JW. Carbonate mineralogy of a tropical bryozoan biota and its vulnerability to ocean acidification Marine Biology Research. 12: 776-780. DOI: 10.1080/17451000.2016.1203951 |
0.35 |
|
| 2016 |
Schopf JW, Calça CP, Garcia AK, Kudryavtsev AB, Souza PA, Félix CM, Fairchild TR. In situ confocal laser scanning microscopy and Raman spectroscopy of bisaccate pollen from the Irati Subgroup (Permian, Paraná Basin, Brazil): Comparison with acid-macerated specimens Review of Palaeobotany and Palynology. 233: 169-175. DOI: 10.1016/J.Revpalbo.2016.03.004 |
0.394 |
|
| 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 |
0.344 |
|
| 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 |
0.356 |
|
| 2015 |
Schopf JW, Sergeev VN, Kudryavtsev AB. A new approach to ancient microorganisms: taxonomy, paleoecology, and biostratigraphy of the Lower Cambrian Berkuta and Chulaktau microbiotas of South Kazakhstan Journal of Paleontology. 89: 695-729. DOI: 10.1017/Jpa.2015.56 |
0.434 |
|
| 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 |
0.367 |
|
| 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 |
0.324 |
|
| 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 |
0.383 |
|
| 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 |
0.668 |
|
| 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 |
0.458 |
|
| 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 |
0.496 |
|
| 2011 |
Schopf JW. The paleobiological record of photosynthesis Photosynthesis Research. 107: 87-101. PMID 20607406 DOI: 10.1007/S11120-010-9577-1 |
0.402 |
|
| 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 |
0.386 |
|
| 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 |
0.355 |
|
| 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 |
0.422 |
|
| 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 |
0.413 |
|
| 2010 |
Schopf JW, Kudryavtsev AB. A renaissance in studies of ancient life Geology Today. 26: 140-145. DOI: 10.1111/J.1365-2451.2010.00760.X |
0.423 |
|
| 2010 |
Schopf JW, Kudryavtsev AB, Sugitani K, Walter MR. Precambrian microbe-like pseudofossils: A promising solution to the problem Precambrian Research. 179: 191-205. DOI: 10.1016/J.Precamres.2010.03.003 |
0.414 |
|
| 2009 |
Schopf JW, Bottjer DJ. World summit on ancient microscopic fossils Precambrian Research. 173: 1-3. DOI: 10.1016/J.Precamres.2009.06.001 |
0.338 |
|
| 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 |
0.416 |
|
| 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 |
0.375 |
|
| 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 |
0.709 |
|
| 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 DOI: 10.1089/Ast.2007.0184 |
0.447 |
|
| 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 |
0.41 |
|
| 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 |
0.67 |
|
| 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 |
0.406 |
|
| 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 |
0.308 |
|
| 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 |
0.771 |
|
| 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 |
0.404 |
|
| 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 |
0.697 |
|
| 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 |
0.644 |
|
| 2006 |
Schopf JW. The first billion years: When did life emerge? Elements. 2: 229-233. DOI: 10.2113/Gselements.2.4.229 |
0.371 |
|
| 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 |
0.647 |
|
| 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 |
0.738 |
|
| 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 |
0.39 |
|
| 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 |
0.611 |
|
| 2002 |
Shen-Miller J, Schopf JW, Harbottle G, Cao RJ, Ouyang S, Zhou KS, Southon JR, Liu GH. Long-living lotus: germination and soil {gamma}-irradiation of centuries-old fruits, and cultivation, growth, and phenotypic abnormalities of offspring. American Journal of Botany. 89: 236-47. PMID 21669732 DOI: 10.3732/Ajb.89.2.236 |
0.324 |
|
| 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 |
0.366 |
|
| 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 |
0.723 |
|
| 2002 |
Schopf JW, Kudryavtsev AB, Agresti DG, Wdowiak TJ, Czaja AD. Images of the Earth's earliest fossils? Nature. 420: 477-477. DOI: 10.1038/420477A |
0.685 |
|
| 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 |
0.389 |
|
| 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;2 |
0.62 |
|
| 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 |
0.354 |
|
| 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 |
0.386 |
|
| 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. DOI: 10.1002/J.1537-2197.1995.Tb12673.X |
0.314 |
|
| 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 |
0.679 |
|
| 1978 |
Chauvel JJ, Schopf JW. Late precambrian microfossils from Brioverian cherts and limestones of Britanny and Normandy, France Nature. 275: 640-642. DOI: 10.1038/275640A0 |
0.468 |
|
| 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 |
0.374 |
|
| 1977 |
Bloeser B, Schopf JW, Horodyski RJ, Breed WJ. Chitinozoans from the late precambrian chuar group of the grand canyon, Arizona. Science (New York, N.Y.). 195: 676-9. PMID 17816417 DOI: 10.1126/Science.195.4279.676 |
0.331 |
|
| 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 |
0.418 |
|
| 1976 |
Schopf JW, Sovietov YK. Microfossils in conophyton from the soviet union and their bearing on precambrian biostratigraphy. Science (New York, N.Y.). 193: 143-6. PMID 17759251 DOI: 10.1126/Science.193.4248.143 |
0.392 |
|
| 1973 |
Schopf JW, Ford TD, Breed WJ. Microorganisms from the late precambrian of the grand canyon, Arizona. Science (New York, N.Y.). 179: 1319-21. PMID 17835936 DOI: 10.1126/Science.179.4080.1319 |
0.343 |
|
| 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 |
0.412 |
|
| 1972 |
Satterthwait DF, Schopf JW. STRUCTURALLY PRESERVED PHLOEM ZONE TISSUE IN RHYNIA American Journal of Botany. 59: 373-376. DOI: 10.1002/J.1537-2197.1972.Tb10107.X |
0.33 |
|
| 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 tranquiblity. Science (New York, N.Y.). 167: 760-2. PMID 17781583 DOI: 10.1126/Science.167.3918.760 |
0.61 |
|
| 1970 |
SCHOPF JW. PRECAMBRIAN MICRO-ORGANISMS AND EVOLUTIONARY EVENTS PRIOR TO THE ORIGIN OF VASCULAR PLANTS Biological Reviews. 45: 319-352. DOI: 10.1111/J.1469-185X.1970.Tb01644.X |
0.332 |
|
| 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 |
0.424 |
|
| 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. |
0.608 |
|
| 1969 |
Gutstadt AM, Schopf JW. Possible algal microfossils from the late pre-cambrian of california Nature. 223: 165-167. DOI: 10.1038/223165B0 |
0.376 |
|
| 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 |
0.58 |
|
| 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 |
0.703 |
|
| 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 |
0.694 |
|
| 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 |
0.69 |
|
| 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 |
0.697 |
|
| 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 DOI: 10.1126/Science.149.3690.1365 |
0.648 |
|
| 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 |
0.665 |
|
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