. A geological reconnaissance of the Dominican republic . om the bluish-gray to olive-green clays of the Yaque group. The un-conformity between the two formations is plainly shown at a locality3 kilometers upstream from Los Giiiros. Here the gravel of the Las Matasformation forms a cliff on the left bank of the river, whereas a short dis-tance farther upstream the water flows in a cataract over fossiliferoussandstone of the Yaque group. The unconformity between the twoformations is very marked, for there is discordance in the strikes as well asthe dips. The general character of the strata alon
. A geological reconnaissance of the Dominican republic . om the bluish-gray to olive-green clays of the Yaque group. The un-conformity between the two formations is plainly shown at a locality3 kilometers upstream from Los Giiiros. Here the gravel of the Las Matasformation forms a cliff on the left bank of the river, whereas a short dis-tance farther upstream the water flows in a cataract over fossiliferoussandstone of the Yaque group. The unconformity between the twoformations is very marked, for there is discordance in the strikes as well asthe dips. The general character of the strata along the upper course of Rio Yaquein the vicinity of the crossing of the Azua-San Juan road is described below.(See PI. XVIII, A.) From the mouth of Ilio de Las Cuevas down to themouth of Rio San Juan there are thick deposits of sandstone and conglom-erate, which are considered the basal part of the Yaque group. The samestrata appear for a distance of several kilometers up Rio San Juan and com- DOMINICAN REPUBLICGeological Survey Memoirs, Vol. I, Pl. XVIII. A. SANDY SHALE AND SANDSTONE OF THE YAQUE GROUP ON RIO YAQUE DEL SUR ATCEOSSING OF AZUA-SAN JUAN ROAD.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectgeology, bookyear1921
