Interpretation of Biological and Environmental Changes Across the Neoproterozoic-Cambrian Boundary

Interpretation of Biological and Environmental Changes Across the Neoproterozoic-Cambrian Boundary

Author: L.E. Babcock

Publisher: Gulf Professional Publishing

Published: 2005-11-30

Total Pages: 240

ISBN-13: 9780444520654

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The Neoproterozoic-Cambrian transition was a time of fundamental change in the biosphere. Between about 570 and 510 million years ago, marine organisms underwent considerable evolutionary innovation during a time of shifting ecological setting. This dramatic activity culminated in the first stratigraphic appearances of many recognizable groups of animals, an "event" often referred to as the "Cambrian explosion". In addition, there was a major change from a microbial mat-dominated sediment-water interface to a more extensively burrowed interface in shallow-marine settings. The early fossil record is a function not only of the rise or ecological diversification of marine organisms, but also the development of taphonomic and sedimentary conditions suitable for the preservation of mineralizing and nonmineralizing organisms. This book is devoted to an exploration of some of the emerging concepts and techniques used to develop greater insight into the early record of biologic diversification and the preservational record of that diversification during the Neoproterozoic-Cambrian transition. * Addresses key issues related to the Cambrian diversification of multicellular animals * Provocative new ideas about the factors involved in the exceptional preservation of fossils, with a balance between the development of ideas and hypothesis testing * Broad coverage of topics related to the Cambrian diversification of animals and the fossil record of that diversification; broad geographic coverage


Au, U, Fe, Mn, Hg, Sb, W, and P Deposits

Au, U, Fe, Mn, Hg, Sb, W, and P Deposits

Author: Bozzano G Luisa

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 663

ISBN-13: 0444599436

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Handbook of Strata-Bound and Stratiform Ore Deposits, Volume 7: Au, U, Fe, Mn, Hg, Sb, W, and P Deposits focuses on the characteristics, properties, origins, and structures of Au, U, Fe, Mn, Hg, Sb, W, and P deposits. The selection first elaborates on gold in the Proterozoic sediments of South Africa, nature of the Witwatersrand gold-uranium deposits, and origin of Western-States type uranium mineralization. Discussions focus on tectonic conditions, sedimentation, mineralization and alteration, architecture of the Witwatersrand Basin, source of wealth in the Witwatersrand Basin, gold mineralization in South Africa, and ground-rules for gold prospecting. The text then ponders on origin of the Precambrian banded iron-formations, aspects of the sedimentary petrology of cherty iron-formation, and genetic problems and environmental features of volcanosedimentary iron-ore deposits of the Lahn-Dill Type. Concerns cover geological setting, crystallization structures, origin of cherty iron-formations, similarities and differences between banded and oolitic iron-formations, regional geologic distribution, and general diagnostic statement. The manuscript examines sedimentary phosphate deposits, ancient manganese deposits, and freshwater ferromanganese deposits. The selection is a dependable reference for researchers wanting to explore Au, U, Fe, Mn, Hg, Sb, W, and P deposits.


Bibliography and Ore Occurrence Data

Bibliography and Ore Occurrence Data

Author: Bozzano G Luisa

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 572

ISBN-13: 044459762X

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Handbook of Strata-Bound and Stratiform Ore Deposits, Volume 10: Bibliography and Ore Occurrence Data Indexes, Volumes 8-10 focuses on bibliography and ore occurrence data indexes. The selection first elaborates on the supplementary bibliography of strata-bound and stratiform ore deposits from 1974-1978, including information on antimony, bismuth, chromium, climatology, copper, diffusion, fluid inclusions, fluorite, isotopes, lead-zinc, lithium, magnesite, and manganese. Also mentioned are metallogeny, metamorphism, placers, red beads, sulfides, uranium, and vanadium. The book also presents data on the worldwide distribution of stratiform and strata-bound ore deposits, as well as data sources and reliability, maps of North and South America, Europe, Asia, Australia and western Pacific, and Africa. The text offers information on references index part III and subject index part III. The selection is a valuable source of data for researchers wanting to explore ore deposits.


Minerals Yearbook

Minerals Yearbook

Author: Geological Survey

Publisher:

Published: 2018-04-19

Total Pages: 230

ISBN-13: 9781411341746

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This volume of the Minerals Yearbook provides an annual review of mineral production and trade and of mineral-related government and industry developments in more than 175 foreign countries. It is normally published in separate books that cover specific regions. In this publication, the regional books are combined into one commemorative volume. These annual reviews are designed to provide timely statistical data on mineral commodities in various countries. Each report includes sections on government policies and programs, environmental issues, trade and production data, industry structure and ownership, commodity sector developments, infrastructure, and a summary outlook. More information is available on the three volumes of the Minerals Yearbook. Regional Areas Covered: Africa and the Middle East Asia and the Pacific Europe and Central Eurasia North America, Central America, and the Caribbean South America