Abstract
THE report of the Committee on Sedimentation for the two years 1930–1932 has been published under the auspices of the Division of Geology and Geography of the U.S. National Research Council as National Research Bulletin No. 89, 1932 (pp. 229, price 1 dollar). The report is by the chairman, Prof. W. H. Twenhofel, who contributes a general introduction, and various committee members and others, who are responsible for many valuable records of original research and abstracts of literature on the accessory minerals of igneous and sedimentary rocks. Special attention deserves to be given to the paper on the classification and terminology of the pyroclastic rocks by C. K. Wentworth and Howel Williams. The Bulletin also includes papers on recent advances in the study of peat; recent marine sediments; settling of bentonite in water; relation of the buffer mechanism of sea water to the solubility of calcium carbonate; modern marine sediments in California; bacterial and chemical factors in lime deposition at Tortugas, Florida; varved sediments; chert and flint, concretions, and cone-in-cone; abrasional work of river ice and of glaciers; ground water hydrology in its bearing on sedimentation; rôle of micro-organisms in sediments; accessory minerals of crystalline rocks; and glacial sediments. In addition, there are summaries of work on sedimentation carried out at Stanford University, and also of recent work by German and British investigators; and abstracts of the literature on accessory minerals of igneous rocks and of sedimentary rocks.
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Researches on Sedimentation. Nature 131, 394–395 (1933). https://doi.org/10.1038/131394d0
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DOI: https://doi.org/10.1038/131394d0