Tnickness of the Crustal Layer Consisting of Deformed Geosynclinal Sediments

概要

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The thickness of the crustal layer consisting of deformed geosynclinal sediments is examined, where the Chichibu Palaeozoic Formation, ranging from the middle Silurian to the upper Permian, is taken up as an example. The surface area of each System, though the Silurian and Devonian are combined, is measured on geological maps, and is compared with the stratigraphical thickness. As the surface area and thickness of each System are not in proportion to each other, the overall structure, in spite of the apparent complication, is inferred not to be deep isoclinal folds. The extremely large area of the upper strata compared with the small area of the lower strata indicates a broad and flat syncline including steeper folds of lower order (Fig. 7). The thickness of the crustal layer in question is inferred to be a little larger than, and scarcely attaining two times as large as, the aggregate stratigraphical thickness of the constituent strata.
信州大学理学部の論文
1972-10-20