Annual report of the State Mineralogist for the year ending ... . ough a ledge of dark,slate-colored freestone. The ledge courses north 40 degrees west, anddips to the east at an angle of 45 degrees. It is of variable thickness,in places reaching sixty feet. No quarrying or work of any kind hasbeen done. Large pieces, weighing from five hundred pounds to severaltons, have fallen from the ledge to the road, and none of the pieces showsigns of injurious weathering. In Sec. 26, T. 21 S., R. 13 E., there is a ledge of freestone of goodquality. Continuing up Waltham Creek to the Fresno Hot Springs,
Annual report of the State Mineralogist for the year ending ... . ough a ledge of dark,slate-colored freestone. The ledge courses north 40 degrees west, anddips to the east at an angle of 45 degrees. It is of variable thickness,in places reaching sixty feet. No quarrying or work of any kind hasbeen done. Large pieces, weighing from five hundred pounds to severaltons, have fallen from the ledge to the road, and none of the pieces showsigns of injurious weathering. In Sec. 26, T. 21 S., R. 13 E., there is a ledge of freestone of goodquality. Continuing up Waltham Creek to the Fresno Hot Springs, the countryshows great disturbances in many places. Deep canons are cut by the 188 REPORT OF THE STATE MINERALOGIST. streams, and have made exposures showing the diversified dips of thestrata, varying from horizontal to 80 degrees. Throughout this regionevidences of the flows of old river channels from the Sierra side areseen, which have cemented and become conglomerate, and been upheavedin the general uplifting of the range. In Sec. 15, T. 21 S., R. 14 E., on. WALTHAM^CK FLAT SANDSTONE AND CLAYSHAU SEC. 15 T. 21S. the northern side of the county road, the hills rise abruptly from theroad to an altitude of five hundred feet. The strata are almost hori-zontal, of hard sandstone, clay shale, and, within about one hundredfeet from their summits, beds of puddingstone or conglomerate, varyingin thickness from ten to twenty feet, and continuing for a long distance,finally lessening to a feather edge and disappearing entirely.
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Keywords: ., bookcentury1800, booksubjectgeology, booksubjectminesandmineralr
