OCR Text |
Show RECONNAISSANCE IN THE UTE COUNTRY. 67 Organic remains: Productus reticulatus ; P. 8emireticulatu8; Spirigera inflatus ; S. Maconemis ; Spirifer lineatiis. No. 15, 100 feet slope; no outcrop. No. 16, 10 feet flesh- colored limestone, weathering into angular fragments, occasionally seams containing crystals of spar. No. 17, 15 feet of black marble. No. 18, 3 feet of whitish- gray marble. No. 19, 6 feet of white limestone, with a bluish tinge. No. 20, 15 feet of a reddish- brown sandstone. No. 21, 10 feet of whitish gray marble. No. 22, 3 feet of reddish- brown sandstone. The dip of this series is about 10° west. This section carried me down to the wails of the Las Animas Canon, which here are about 1,000 feet high. They are granitic at this point. The river itself is inaccessible. In a gulch half way between Camps 27 and 28,1 found cropping from beneath blue limestone about 8 feet of buff limestone. This rested upon coarse brown sandstone, of which I could not determine the thickness. From this point I lost trace of my section. About one mile above Camp 28 I made the following section west of the line and in descending order: No. 1, 20 feet of bluish- gray fossiliferous limestone. Organic remains: Productus reticulatus ; Spirifer lineatus ; S. KentucJc-ensis ; Spirigera Maconemis. No. 2, 15 feet or more of sandstone. No. 3. 30 feet of bluish- gray limestone; fossiliferous. No. 4, 50 feet of coarse sandstone. No. 5, 20 feet of bluish- gray limestone; no fossils found. No. 6, 40 feet or more of sandstone. The wall- rock of the creek at Camp 28 is composed of blue limestone, but being isolated or unaccompanied by the other members of the series, its identity remains in doubt. Nothing defiuite is determined between Camps 28 and 29, owing to the deep irregular carious, except that the blue limestone and the brown sandstone crop out in several places; but at Camp 29, in the bluff on the west, blue limestone, with the shale beneath it, is exposed. My section is not sufficiently classified to give these formations their proper . places. At a point on the line a mile south of Camp 29, the following section occurs, commencing at an elevation of 900 feet above our route, as follows, descending: * No. 1, 75 feet of hard, blue- gray fossiliferous limestone. Organic remains: Productus costatus; P. cord.; P. reticulatus; Spirifer lineatm; Spirigera subtilita. No. 2, 75 feet coarse sandstone, mottled. No. 3,150 feet of bluish- gray limestone, shading into white sub- crystalline, and resembles marble. Organic remains: Productus reticulatus; Spirifer Kentuckensis ; Spirigera subtilita. No. 4, 111 feet coarse, reddish- brown sandstone. No. 5,50 feetof hard, blue, sub- crystalline limestone, shading into gray j no organic remains found. No. 6, 30 feet reddish- brown sandstone. No. 7, 30 feet of bluish limestone, shading into a bluish tint; no organic remains found. Nos. 8 to 12, 720 feet of bluish- gray and mottled sandstone. No. 13,150 feet of slope. |