Abstract
THE use of features such as graded bedding and cross-lamination, pillow lavas and pipe amygdales, to establish the order of succession in a series of folded strata is but briefly dealt with in text-books of geology. Prof. Robert R. Shrock sets out to describe and illustrate not only these better-known top and bottom criteria, but also all other features, structures and relations which have been or might be employed in determining the original order of succession in sedimentary, igneous and metamorphio rocks. His comprehensive compilation is a work of quite a new kind which can be used with advantage to supplement existing texts of a more general nature. While prepared specifically for students, it will form a valuable review for experienced field geologists, who will undoubtedly find it most stimulating. The illustrations comprise some 500 line drawings and more than 150 photographs, nearly all of which are new to text-book literature. A bibliography of seven hundred items is drawn principally from American and British publications.
Sequence in Layered Rocks
A Study of Features and Structures useful for Determining Top and Bottom or Order of Succession in Bedded and Tabular Rock Bodies. By Prof. Robert R. Shrock. Pp. xiii+507. (New York and London : McGraw-Hill Book Co., Inc., 1948.) 45s.
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Sequence in Layered Rocks. Nature 163, 347 (1949). https://doi.org/10.1038/163347d0
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DOI: https://doi.org/10.1038/163347d0