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USA. The Penrose Conference on "Timing of Orogenic Activity in the Appalachian-Caledonide System" took place in Alabama, in May 1981; segments of the orogen from Alabama to northern Norway were examined. In addition to the Americans, geologists from Norway, Sweden, UK and Canada were present. A Bouguer gravity anomaly map and a magnetic anomaly map (1:1,000, 000 and 1:2, 000, 000) have been published as a joint Canadian-USA cooperation. Other Project maps are well in hand. Activities planned. 1. "Regional trends in the Geology of the Appalachian-Caledonian-Hercynian Orogen", Atlantic, Canada, 2-17 August 1982; 2. Symposium "The Hercyno-Caledonide Evolution of Morocco", Rabat, Morocco, 7-10 September 1983; 3. The Caledonide Orogen - final symposium and presentation of atlas of maps, to be held at the University of Glasgow, UK, in early September 1984. No. 29 PRECAMBRIAN-CAMBRIAN BOUNDARY J.W. Cowie, Department of Geology, University of Bristol, University Walk, Bristol BS8 1TR, United Kingdom. Description. International agreement is sought on the definition of the Precambrian-Cambrian boundary (the Proterozoic-Phanerozoic transition) in litho-, bio-, and chronostratigraphic terms, based on a point in the standard rock sequence, coupled with elucidation of the significant palaeobiological transitions occurring at, or about, this stage in the Earth's history. Summary of activities. Field and laboratory research on the Projet is now world-wide and advancing on many fronts in many countries. Some of the regions which deserve passing mention are given here. 1. Newfoundland - work on the earliest Cambrian and latest Precambrian formations is proceeding well with Fletcher, Conway Morris, Richards, Landing, and Bengtson covering both the Avalon and Burin Peninsulas of eastern Newfoundland. Anderson and Crimes study trace fossils. 2. In the western USA a field excursion visited the White-Inyo Mountains in eastern California in July 1981 and members of the Precambrian- Cambrian Boundary Working Group were able to study and collect. 3. China - Work continues apace in north-western Guizhou province in preparation for the visit in 1982 by the Working Group. 4. Soviet far East ("Siberia") - A Soviet party was joined by Fritz, Kirschvink, and Cowie to re-examine the sections across the Precambrian 20 Cambrian boundary on the Aldan River, including Ulakhan-Sulugur. 5. Arctic Siberia - Sokolov and Fedonkin discovered many trace fossils and body fossils in the Precambrian-Cambrian sections in the area north of the Anabar Shield. 6. Mongolia - Palaeontological and biostratigraphic studies now are completed in preparation for the Project's visit in September 1982. 7. Poland - A publication in English summarizing results by the joint Polish-Soviet Working Group studying the late Precambrian and early Cambrian geology of the East European Platform is being prepared by Urbanek (Poland) and Rozanov (USSR). 8. Sweden - Work by Bengtson, Bergstrôm, Vidal, and Ahlberg continues, relating well to work in neighbouring East European Platform regions. 9. United Kingdom - A two-day symposium in 1982 on "Geochronology and the Geological Time Scale" will include a section on late Precambrian/ Cambrian by Cowie and Johnson. 10. India - The National Working Group in India for this Project held another meeting in Lucknow in January 1981, when reports were given by Sri Gopendra Kumar on the status of work in two areas: the Spiti Valley, Himalayas, and Lolab Valley, Kashmir where lithostratigraphic, body fossils, trace fossils, and palynological results are coming forward. Magnetostratigraphic studies also are under way. The Second International Symposium on the Cambrian System took place in Golden, Colorado, USA, 8-13 August 1981, at which 40 geoscientists attended. Eighteen papers on the Precambrian- Cambrian boundary were presented at the Technical Session and then were published. On this occasion the Project's business meetings and two workshops also were held on 10 and 11 August. The following issues were discussed at the business meetings: 1. Project Leader's Report 1980/1981 including Paris meeting in July 1980. 2. IUGS/IGCP Reports and IGCP Board and Scientific Committee recommendations and comments. 3. Publications pending and planned. 4. Membership. 5. Project Committees' reports: (i) Trace Fossils, Convener: Crimes, (ii) Magnetostratigraphy, Convener: Kirschvink, (iii) Geochronology, Convener: Cowie, (iv) Terminal Precambrian Period, Convener: Sokolov, (v) Palaeoclimatology, Convener: Harland. The topics with speakers who introduced them at the workshops are listed as follows : 1. USSR (east and west): Rozanov, Fedonkin,
Khomentovskiy. 2. Canada (Mackenzies, Cassiars, Newfoundland): Fritz, Conway Morris, Fletcher, Landing. 3. USA (White-Inyo Mts, California): Nelson, Palmer, Tynan, Taylor. 4. Morocco and Spain: Debrenne. 5. Himalayas (Kashmir and Spiti): Cowie. 6. China: Cowie. 7. England: Brasier, Rushton, Cowie. 8. Mongolia: Rozanov. 9. Argentina: Cowie. 10. Other areas: Cowie. 11. Precambrian- Cambrian global correlations. General discussion also covered planning of conferences, field meetings, with new and continuing research into biostratigraphical, palaeobiological, magnetostratigraphy, geochronology, transgression/ regression cycles, and other subjects. Activities planned. 1. Meeting in People's Republic of Mongolia, August 1982; 2. Meeting in People's Republic of China, September 1982; 3. Plenary Session in Bristol, England, UK, May 198 3; 4. Meeting in Ukraine and Esthonia, USSR, 1983; 5. Documentation of global stratotype section and Point Candidates in the immediate future. 6. Meeting at the 27th IGC (Moscow, 1984). No. 30 CIRCUM-PACIFIC PLUTONISM P.C. Bateman, United States Geological Survey, 345 Middlefield Road, Menlo Park, California 94025, USA. Description. The objectives of the Project are to gain an understanding of the voluminous batholiths, especially ones of Mesozoic age, that form much of the margins of the Pacific Basin in relation to plate tectonics, volcanism, ore deposits, metamorphism, and other geologic processes. Meetings have been held, beginning in 1972, in different nations marginal to the Pacific. Each meeting has been centred on a theme appropriate to the locale and has been followed by field trips in the host country. Summary of activities. A business meeting limited to key Project members was held 3-8 May 1981 in the United States at the Wawona hotel in the southern part of Yosemite National Park, California. The primary purpose of the meeting was to review the final products of the Project before publication. These products are a symposium-volume, "Circum-Pacific Plutonic Terranes", an "Annotated Bibliography of Circum-Pacific Plutonism", and a "Map of Circum-Pacific Magmatism". The editor of the symposium-volume, which includes 19 papers on plutonism in 12 different countries, is J. A. Roddick of Canada, and the compilors of the annotated bibliography are W. A. Pitcher of England and Luis Aguirre of Chile. Both these products have been submitted to the Geological Society of America and are being prepared for publication. The Symposium-volume will be published as a memoir and the annotated bibliography in the microform series. The "Map of Circum-Pacific Magmatism" was assembled and will be published in the USSR under the direction of N.A. Shilo, L.I. Krasny, and A. Milov. Because of the complexity of the map and because translation of captions into English, Spanish, and Japanese presents problems, publication of the map will be delayed until revisions have been completed and the map has been reviewed. Activities planned. Final review of the "Map of Circum-Pacific Magmatism" will be made in Japan, probably in March 1982. For the review the Soviet compilors will meet with the Project leader and with Japanese representatives. No. 32 STRATIGRAPHIC CORRELATIONS BETWEEN THE SEDIMENTARY BASINS OF THE ESCAP REGION Mineral Resources Section, Natural Resources Division, ESCAP, The United Nations Building, Rajadamnern Avenue, Bangkok-2, Thailand. Description. The major emphasis of the Project is to determine the nature, structure, age, thickness, faciès and sedimentary sequences in the depositional basins of the ESCAP region, including studies on faciès patterns and sequences in platforms and géosynclinal domaines to enrich the knowledge of tectonic and palaeogeographic controls of mineral and chemical distributions. The Project includes the production of an atlas of stratigraphy representing the features of the sedimentary successions in each of the main sedimentary basins of the ESCAP region and the correlations between them. In addition, the stratigraphie character of those basins will be analysed in relation to hydrocarbon occurrences, their origin and distribution, with a view of recognising the factors in sedimentary basin development which favoured the generation of energy and mineral resources. Summary of activities. Two volumes of the ESCAP Atlas of Stratigraphy, published as Mineral Resources Development Series (MRDS) volume Nos. 44 and 46 have been distributed. The third volume will be MRDS volume No. 48 and is in press; it contains descriptions of sedimentary basins in Australia, Bangladesh, Fiji, India, Indonesia, Nepal, Solomon Islands, and Tajikistan. We have been advised that work on contributions to the atlas is in progress in several of the remaining countries, particularly Afghanistan, China, Korea, and Vietnam. The first edition sheets of the Map of the Sedimentary Basins of the ESCAP region, at a scale of 1:10, 000, 000, has been completed; comprising seven sheets in the northern hemisphere and five sheets in the southern hemisphere. The map sheets have been distributed and about 100 requests for the map were received from institutions, libraries, and the private sector. 21
Page 1 and 2: UMBER REPORT OF THE INTERNATIONAL G
Page 3 and 4: Final Report of the Tenth Session o
Page 5 and 6: to involve developing countries in
Page 7 and 8: mittee (N. Bogdanov) has informed t
Page 9 and 10: IGCP Scientific Committee The IGCP
Page 11 and 12: No. Title /Project Leader (duration
Page 13 and 14: generally classified as "Buntsandst
Page 15 and 16: - Strengthening of the training pro
Page 17: Mapping has covered the entire widt
Page 21 and 22: type of the N/Q boundary, especiall
Page 23 and 24: As a result the Palysolenoxylon "bi
Page 25 and 26: No. 58 MID-CRETACEOUS EVENTS R.A. R
Page 27 and 28: at Uppsala (August 20-21, 1981) to
Page 29 and 30: Ko. 86 EAST EUROPEAN PLATFORM (sout
Page 31 and 32: that the Permo-Scythian of the East
Page 33 and 34: African basins. A re-evaluation of
Page 35 and 36: No. 114 BIOSTRATIGRAPHIC DATUM-PLAN
Page 37 and 38: the likelihood of whether petroleum
Page 39 and 40: India, Japan, Suriname, UK, Venezue
Page 41 and 42: 4. Geobotanical Lithofacies and Lim
Page 43 and 44: stratigraphy. Specific problems are
Page 45 and 46: Summary of activities. Two scientif
Page 47 and 48: from Algeria. The Baas Becking Geob
Page 49 and 50: Subproject B: Lake and mire environ
Page 51 and 52: (1) Sharp (1981) has shown that the
Page 53 and 54: egional or stratigraphical principl
Page 55 and 56: 3. The following continuous section
Page 57 and 58: iostratigraphical scales for the Af
Page 59 and 60: Outline of Projects Accepted in 198
Page 61 and 62: Members of IGCP Scientific Committe
Page 63 and 64: BURMA/BIRMANIE Mr. U. Than Nyunt, C
Page 65 and 66: IRAN B.P. 4322 Abidjan Dr. F. Sarab
Page 67 and 68: NORWAY/NORVEGE SENEGAL Prof. K.S. H
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VENEZUELA YUGOSLAVIA/YOUGOSLAVIE Na
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PANAMA Dr. Daniel Esquivel K Direct
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Unesco-sponsored Post-graduate Trai
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PRINCIPLES AND METHODS OF ENGINEERI
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operations, they must interpret the
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Selected IGCP Publications for 1981
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Kassai, M., 1980: A Dél-Dunantul p
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Jiang Zhiwen, 1980: Monoplacophoran
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Sabattini, N. , 1980: Gastrópodos
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Paris, F.; Laufeld, S., étal., 198
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Reyment, R.A., 1980: Mid-Cretaceous
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Faure, H., 1980: Late Cenozoic vert
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Warrington, G., 1980: United Kingdo
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Hekínian, R., et al. , 1980: Sulph
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Knuver, M.; Reissmger, M., 1981: Th
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Burnett, W.C.; Mitchum, G. T., 1981
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Kozarski, S. (éd.), 1981: Abstract
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Moullade, M.; Guerin, S., 1981: Cor
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In order to avoid any confusion, it
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