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United States Department of the Interior Geological Survey Short Papers For UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY SHORT PAPERS FOR THE SECOND INTERNATIONAL SYMPOSIUM ON THE CAMBRIAN SYSTEM 1981 Michael E. Taylor Editor Open-File Report 81-743 Technical sessions held August 9-13, 1981, at the Colorado School of Mines, Golden, Colorado, United States of America AUTHOR INDEX Acerolaza, P. G., p. 1 Lai Cai-gen, p. 242 Ahlberg, Per, p. 5 Lafuste, J. CL, p. 64 Altken, 0. Dn p. 8 Landing, Ed, p. 222 Apolionov, M. 1C, p. 15 Un Huanllng, p. 118 Bengtson, Stefan, p. 18,19 LuoHuUin.p.123 Bergstrflm, Jan, p. 22 Lu Yanhao, p. 118,1U Brangulls, A. Pn p. 26 vMamy, J. Ln p, 65 Braaier, M. Dn p. 29 Mch4amara, K. Jn p. 126 BrigoA D. C. GL, p. 34, 38 Mens, K. An p. 26,130,132 Bush, J.H,p.42 Miller, J.Fn p. 78,134 Cheong, C. I-L, p. 46 Miller, R. Hn p. 57,138 Chugaeva, M. hL, p. 15 Miaiarzhevaky, V. Vn p. 19 Conway Morris, Simon, p. 47 Mount, J. Fn p. 143 Cook, H. En p. 50 MOUer, K. Jn p. 147 Cooper, 3. Dn p. 57,138 Norford, B. Sn p. 152 Dabrenne, Fn p. 63,64,65 Palmer, A. Rn p. 156,160 Demlcco, R. V., p. 67 Parrish, J. Tn p. 252 Oaratler, Kraig, p. 71 Perrus, Enn, p. 132 Drozdova, N. A^ p. 76 Pojeta, John, >n P-163,167 Dubinins, S. Vn p. 15 Ragozina, A. L-, p. 76 Egbert, R. Mn p. 50 Rees, M. Nn p. 188 Erdtmann, B.-Dn p. 78 Repetski, J. En p. 169 Ergaliev, G. Kn p. 82 Repina, L. Nn p. 173 Fadonkin, M. A^ p. 89, 91 Rigby, J. Kn p. 181 Ftochcr,K J^p.42 Rowell, A. JL, p. 184,188 Fletcher, T. Pn p. 18 Rowland, S. Mn p. 143,193 Fenln, V. Dn p. 76 Rozanov, A. Yun p. 26,76 Gangloff, R. A., p. 63, 64 Runnegar, Bruce, p. 196 Giiiett, S. U, p. 222 Sayutlne, T. An p. 76 Grigorjeva, N. V., p. 76 Scotese, C. Rn p. 252 Hardie, L. A^ p. 67 Sepkoski,J.Jnp.203 Hewitt, R. A^ p. 29 Shergold, J* Hn p* 208 Jago, J» B», p* 93 Spencer, L. Mn p. 215 James, N. Pn p. 63 Sprinkle, James, p. 219 Jell, P. An p. 97 Sundberg, F. An p. 57,138 Kepper, John, p. 100,102 Szaniawski, Hubert, p. 169 Kindle, C. K, p. 106 Taylor, M. En p. 222 Kirjyanov, V. V^ p. 26 Theokritoff, George, p. 228 Kopaska-Merkel, D. C., p. Ill Toselli, A. Jn p. 1 Kurtz, V. En p. 115 Tynan, M. Cn p. 231 Vidal, Gonzalo, p. 232 Voronin, Yu. L, p. 76 Voronova, L. GL, p. 76 Webere, a P., p. 167, 236 Whittington, H. a, p. 38, 239 Xiang Li-wen, p. 240, 242 Yochebon, E. U, P-167, 244 Yuan JInliang, p. 250 VuanK«xing,p. 249 Zhang Sengui, p. 249 Zhegallo, E. A^ p. 76 Zhiwen, Jiang, p. 98 Zhou Zhiyl, p. 250 Zhu Zhaoling, p. 121 Ziegler, A. H., p. 252 * U. S. WVEMWEIIT miNTINC OFFICE IjBl - 780-«V*15 SECOND INTERNATIONAL SYMPOSIUM ON THE CAMBRIAN SYSTEM ORGANIZING COMMITTEE Michael E. Taylor, Chairman U.S. Geological Survey, Denver, Colorado Allison R. Palmer Geological Society of America, Boulder, Colorado Richard A. Robison University of Kansas, Lawrence, Kansas Albert J. Rowell University of Kansas, Lawrence, Kansas PROGRAM Field Trip 1. Cambrian Stratigraphy and Paleontology of the Great Basin and vicinity, western United States. July 30 to August 9, 1981. Technical Sessions. Colorado School of Mines, Golden, Colorado. August 9-13, 1981. Field Trip 2. The Cambrian System in the Canadian Rocky Mountains, Alberta and British Columbia. August 14-20, 1981. Field Trip 3. Cambrian and Lowest Ordovician Lithostratigraphy and Biostratigraphy of Southern Oklahoma and Central Texas. August 14-19, 19S1. ii PREFACE The Cambrian System holds special scientific interest because it contains the primary record of the earliest evolutionary diversification of metazoan life on Earth. Study of the patterns of evolutionary diversification and associated environmental conditions provides our understanding of the original colonization of the Earth's marine ecosystem by complex plant and animal communities. Rocks of Cambrian age contain a significant portion of the world's sedimentary and metallic mineral resources. Increased understanding of Cambrian stratigraphy, depositional environments, and paleogeography improves our ability to discover new deposits which are so necessary to the agricultural and industrial well being of the world's human population. This volume is the proceedings of the technical sessions of the Second International Symposium on the Cambrian System, held August 9-13, 1981, in Golden, Colorado. The first international Cambrian symposium was held in conjunction with the 20th International Geological Congress in Mexico City in 1956. Since 1956, a wealth of research on Cambrian stratigraphy and paleontology has been conducted in all parts of the world. This volume contains a sample of that work in 72 scientific reports authored or coauthored by 95 research scientists. Thirteen countries are represented by the contributors, including the United States of America (37), the Union of Soviet Socialist Republics (16), the People's Republic of China (12), England (6), Australia (5), Sweden (5), Canada (3), France (3), Argentina (2), Estonia (2), West Germany (2), South Korea (1), and Poland (1). This volume was edited and published with a lead time of less than three months from the time manuscripts were received from authors. Reports were technically reviewed by at least two specialists, and edited and proofread by the editor, who assumes all responsibility for errors in the published version of the authors' original texts. Production of this proceedings volume in such a short period of time would not have been possible without the dedicated effort of Julia E. H. Taylor, Leonard A. Wilson, and a group of very capable publications specialists and typists from the U.S. Geological Survey in Denver, Colorado. Michael E. Taylor, Editor June 12, 1981 111 CONTENTS Page Preface................................................................................. iii 1. The Precambrian-Lower Cambrian Formations of Northwestern Argentina. By F. G. Acenolaza and A. J. Toselli ............................................. 1 2. Ptychopariid Trilobites in the Lower Cambrian of Scandinavia. By Per Ahlberg ............................................................... 5 3. Generalizations about Grand Cycles. By James D. Aitken ................................. 8 4. The Cambrian-Ordovician Boundary in the Malyi Karatau Range, South Kazakhstan. By M. K. Apollonov, M. N. Chugaeva and S. V. Dubinina ............................ 15 5. The Succession of Skeletal Fossils in the basal Lower Cambrian of Southeastern Newfoundland. By Stefan Bengtson and Terence P. Fletcher......................... 18 6. Coeloscleritophora - A Major Group of Enigmatic Cambrian Metazoans. By Stefan Bengtson and Vladimir V. Missarzhevsky................................. 19 7. Lower Cambrian Shelly Faunas and Biostratigraphy in Scandinavia. By Jan BergstrBm ............................................................. 22 8. Vendian and Cambrian Paleogeography of the East European Platform. By A. P. Brangulis, V. V. Kirjyanov, K. A. Mens, and A. Yu. Rozanov ........................................................... 26 9. Faunal Sequence within the Lower Cambrian "Non-Trilobite Zone* (S.L.) of Central England and Correlated Regions. By M. D. Brasier and R. A. Hewitt ................. 29 10. The Burgess Shale Project. By Derek E. G. Briggs ........................................ 34 11. Relationships of Arthropods from the Burgess Shale and other Cambrian Sequences. By D. E. G. Briggs and H. B. Whittington ......................................... 38 12. Stratigraphic and Depositional Summary for Middle and Upper Cambrian Strata in Northeastern Washington, Northern Idaho and Northwestern Montana. By John H. Bush and Howard J. Fischer........................................... 42 13. Precambrian-Cambrian Boundary in Korea. By Chang Hi Cheong ........................... 46 14. The Burgess Shale Fauna as a Middle Cambrian Community. By S. Conway Morris........................................................... 47 15. Late Cambrian-Early Ordovician Continental Margin Sedimentation, Central Nevada. By Harry E. Cook and Robert M. Egbert........................... 50 16. Upper Cambrian Depositional Environments, Southeastern California and Southern Nevada. By John D. Cooper, Richard H. Miller and Frederick A. Sundberg ............ 57 iv Page 17. Archaeocyathan Buildups: Pioneer Reefs of the Paleozoic. By F. Debrenne, R. A. Gangloff and N. P. James................................... 63 18. Microstructure of Tabulaconus and its Significance to the Taxonomy of Early Phanerozoic Organisms. By F. Debrenne, J. G. Lafuste and R. A. Gangloff.................................. 64 19. Archaeocyath Occurrences and Tectonic Movements in the Canadian Cordillera. By F. Debrenne and J. L. Mansy ................................................. 65 20. Patterns of Platform and Off-Platform Carbonate Sedimentation in the Upper Cambrian of the Central Appalachians and their Implications for Sea Level History. By Robert V. Demicco and Lawrence A. Hardie.................................... 67 21. Morphological Diversity of Early Cambrian Echinoderms. By Kraig Derstler ............................................................. 71 22. Precambrian-Cambrian Reference Section in Mongolia. By N. A. Drozdova, V. D. Fonin, N. V. Grigorjeva, A. L. Ragozina, A. Yu. Rozanov, T. A. Sayutina, L. G. Voronova, Yu. I. Voronin, and E. A. Zhegallo ............................................... 76 23. Eustatic Control of Lithofacies and Biofacies Changes near the Base of the Tremadocian. By Bernd-D. Erdtmann and James F. Miller ....................................... 78 24. Upper Cambrian Biostratigraphy of the Kyrshabakty Section, Maly Karatau, Southern Kazakhstan
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