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- In No. 1 of the above section we found fragments of vertebrates and teeth which have been described and figured by Prof. Cope, and will be more particularly noticed under the description of Trassic.
- No. 2 had no fossils, but had very much the appearance of beds seen in the vicinity of Mount Blanco.
- No. 3 was a coarse unconsolidated sand, with many fossil vertebrates. Some of the best preserved specimens found in this vicinity.
- No. 4 contained no fossils.
- No. 5 is a coarse sand, with gravels of various sizes. In it were many concretions, or hardened masses of sand. They had the appearance of hollow trunks of small trees crossing one another in various directions, but generally at right angles.
- No. 6 is a fine, closely compacted, sandy clay, extending to the top of the Plains at this place. This bed contained numerous fossil vertebrates and invertebrates.
Rock creek is a lateral canyon three miles long, running into Tule Canyon from the south, about six miles from its head. At the head of Rock creek is about the same succession of strata, and from the beds there I collected the same class of fossils as at the head of Tule Canyon. At the mouth of Rock creek the canyon is 340 feet deep, the creek having cut down through the Triassic beds a distance of 170 feet. The only difference perceptible in the section at this place and that at the head of the canyon, was a bed of coarse gravel at the base of the Tertiary containing waterworn Cretaceous fossils. Prof. Cope says of the age of this bed: "The bed from which the vertebrates were taken at Tule Canyon is of the Equus horizon."
BLANCO BEDS.
The Blanco beds were first mentioned by me in the previous reports of the Survey. The formation is well shown at Mount Blanco, in Crosby county, and for that reason was called Blanco beds.
The following section was made at that place:
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Second Annual Report Geological Survey of Texas, 1890, p. 431.