Fig. 161—Types of deformation north of Lambrama near Sotospampa. A dark basaltic rock has invaded both granite-gneiss and slate. Sills and dikes occur in great numbers. The topographic depression in the profile is the Lambrama Valley. See the Lambrama Quadrangle.
Both the enormous thickness of the Carboniferous limestone series and the absence of clastic members over great areas in the upper portion of the series prove the widespread extent of the Carboniferous seas and their former occurrence in large interlimestone tracts from which they have since been eroded. At Puquiura they extend far over the schist, in fact almost completely conceal it; at Pasaje they formerly covered the mica-schists extensively, their erosion in both cases being conditioned by the pronounced uplift and marginal deformation which accompanied the development of the Vilcapampa batholith.
Fig. 162—Sketch sections at Antabamba to show (a) deformed limestones on the upper edge of the geologic map, [163] A; and (b) the structural relations of limestone and quartzite. See also [Fig. 163].