. Bulletin of the Geological Society of America. Geology. 452 J. B. WOODWORTII—VERTEBRATE FOOTPRINTS, PLAIN VI LLE On the opposite side of the .street occurs an outcrop of the vertical slate series standing at a higher level than the nearly Hat beds exposed 30 feet distant. The sandstones of the base of the block are very thickly beset with joints as the result of the overthrusting of the block. Westward on that margin of the block beyond the limits of the sketch map the gray Carboniferous rocks of the block abut against red beds belonging near the base of the Carboniferous series, the relatio
. Bulletin of the Geological Society of America. Geology. 452 J. B. WOODWORTII—VERTEBRATE FOOTPRINTS, PLAIN VI LLE On the opposite side of the .street occurs an outcrop of the vertical slate series standing at a higher level than the nearly Hat beds exposed 30 feet distant. The sandstones of the base of the block are very thickly beset with joints as the result of the overthrusting of the block. Westward on that margin of the block beyond the limits of the sketch map the gray Carboniferous rocks of the block abut against red beds belonging near the base of the Carboniferous series, the relation being effected by faulting. RAIN PRINT HORIZONS At several horizons on the eastern face of the Blake Hill fault-block the shales have been observed to carry the impressions of rainprints, showing that the mud beds were bared to the air, and that the entire series was accumulated in shallow water if not in a fluvial or lacustrine plain. This geographic feature suggested the search for the footprints of Carboniferous amphibians—a search which was at once successful. Footprints description of the plainville tracks The footprints represent the tracks of two individuals, one set being small and distinct, the other larger, but indicated by two imperfect im- pressions only (see plate 40, figures 1 and 2).. ^5^ Figure 2.—Batrachichrwsplainviltensis sp. now (y). The smaller tracks are those of a four-footed, tailed animal (see figure 2), with fairly distinct impressions of fore and hind feet. The fore feet gave four-toed, the hind feet five-toed, impressions. The following measurements are given to supplement the illustrations : Forefoot: length, millimeters; breadth, 4 millimeters. Hind foot: length, 11 millimeters; breadth, 5 millimeters. Length of stride, left maims, 22 millimeters. Breadth of tail-groove, millimeters. Breadth of track, 22 millimeters,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890
