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Show 60 RECONNAISSANCE IN THE UTE COUNTRY. In the valley of Saint Charles are numerous farms well cultivated and producing good crops of wheat, barley, rye, and oats. When there is a lack of rain the stream is used in irrigation. One mile southwest of Camp 1 is a ledge of soft black slate 35 feet thick; contains numerous large septaria, often three feet in diameter, which would probably make good hydraulic cement. Some of these concretions contain large beautiful crystals of calc spar. This formation belongs below the series in the bluffs of Saint Charles Biver. Organic remains.- The same as yesterday with the addition of a large Ammonite. The surface between Saint Charles River and Muddy Greek is broken into a system of deep narrow valleys and ravines, well adapted to shelter stock, and good only for grazing. The valley of Muddy Creek is nearly \ mile in width, the bottom somewhat undulating, with a few farms above and below the line aided by irrigation. From Muddy Creek to the crossing of Greenhorn Creek, the equivalent of the solid formations observed in the vicinity of Saint Charles Eiver Valley occur, with additions, in the eastern bluffs of Greenhorn and its tributaries. The slate is augmented in volume with the following additions, descending : No. 1.- Twenty feet dark bluish- gray shaly limestone, alternating with like- colored marly clays; containing inoceramus problematicus. Pinna, and a few small shells not identified. No. 2.- Two feet dark- blue slaty limestone. No. 3.- Seventy- five feet plastic clays and marl. No. 4.- Two feet like No. 2. No. 5.- One hundred and fifty feet slope with out- crops of slate. From Muddy Creek to the crossing of Greenhorn Creek, a distance of five miles, the surface is much broken. The soil is good, but dry, and would require irrigation to make it produce, for which there are no facilities, except on the creek- bottoms, where a few farms are cultivated. From Greenhorn Creek to Apache Creek, a distance of six and a half miles, the line crosses a level surface, the margin of the great plain on the east, and the Greenhorn range of the Eocky Mountains within twelve miles on the west. The soil here, too, is good, and like that crossed in the first part of the day's inarch, is too dry, with no water for irrigation, but for grazing it is unexceptionable. These conditions exist unaltered between Camps 3 and 4. Farms under irrigation are found in the Huerfano Valley. Grazing, however, is the principal element of husbandry, but the appearance of the flocks and herds shows that this is very poor. From Camp 3 passed over a series of out- crops similar to No. 5, of the last- given section, but not sufficiently uncovered for a definite classification. In the mountain, however, 800 feet above these out- crops, I observed the equivalents of the gray limestone found in the bluffs of the Saint Charles River. The different formations hitherto noted may be approximately classified in the following order, descending: No. 1. Ninety feet ashy- gray, impure limestone; the lower portions weathered, irregular fragments. Organic remains: Inoceramus probU-maticus, Ostrea eongesta, a large Ammonite, and fragments of what might have been a large Inoceramus. Localities: In the bluff of Saint Charles Eiver; capping the high bluffs of Muddy Creek; along Greenhorn • Creek and its tributaries; on the slope of Greenhorn Mountain range, 800 feet above the general level of the plain. No. 2. One hundred and twenty- five feet black, brown, and blue slate, • shale and marl, and large septaria, often two feet in diameter, and con- |