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First published in 1992, The Proterozoic Biosphere was the first major study of the paleobiology of the Proterozoic Earth. It is a multidisciplinary work dealing with the evolution of the Earth, the environment and life during the forty percent of Earth's history that extends from the middle of the Precambrian eon (2500 Ma) to the beginning of the Paleozoic era (550 Ma). The book includes a vast amount of data on Proterozoic organisms and their analogs. Prepared by the Precambrian Paleobiology Research Group, a multidisciplinary consortium of forty-one scientists from eight countries, this monograph was a benchmark in the development of the science of the biochemistry and the organic chemistry of Proterozoic sediments. The study aimed to generate data and analyses based on the re-examination of previous studies and on newer investigations and to build towards the future by placing special emphasis on neglected aspects of paleobiologic study and unsolved problems in the field.
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The thin but widespread Cornbrash Formation is a marine sedimentary deposit of particular interest and importance to stratigraphers because, as revealed by its palaeontology, within it lies a transgressive event which marks the boundary between the Middle Jurassic Bathonian and Callovian stages. The monographic treatment of its varied fauna was started by John Frederick Blake (1839-1906), but he died before the work was completed, and it remained unfinished. This one-volume reissue comprises the two parts that were originally published separately. Part 1 (issued in November 1905) includes details of Cornbrash exposures from Dorset to Yorkshire, and systematic descriptions of the vertebrates (reptiles, crocodiles, fish) and molluscs (nautiloids, ammonites, belemnites and gastropods). The second part (issued posthumously in December 1907) continues to cover the molluscs (scaphopods) and draws the monograph to a premature close. Some seventy taxa are illustrated in nine lithographic plates.
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