. Report of the geological exploration of the fortieth parallel . 8 1 1 4 * 1 4: ■•••• • • 4:: • ■ I . . . 44 . .1 ■ ■ ■ ! TABLE or CHEMICAL ANALYSES. IV.—.UNITED STyVIES GEOLOGICAL EXPLORATION OF THE FORTIETH PAR. iSalines and Hot-Siiring Products. Eg 2 = Locality. Analyst. Cortez Valley (Efflorescence.) Clover Valley - - - - -(Efflorescence.) North Fork Humboldt Peko(Efflorescence.) AlkaJi Elat, Humboldt Valley(Efflorescence.) 35 [ Spaldings Salt Marsh, Smoky Val- ley Flat, Nevada. (Efflorescence.) 36 j Hot Spring, Ruby Valley - - - (Incrustation.) 37 1 Hot Springs, Humboldt Range(Inc
. Report of the geological exploration of the fortieth parallel . 8 1 1 4 * 1 4: ■•••• • • 4:: • ■ I . . . 44 . .1 ■ ■ ■ ! TABLE or CHEMICAL ANALYSES. IV.—.UNITED STyVIES GEOLOGICAL EXPLORATION OF THE FORTIETH PAR. iSalines and Hot-Siiring Products. Eg 2 = Locality. Analyst. Cortez Valley (Efflorescence.) Clover Valley - - - - -(Efflorescence.) North Fork Humboldt Peko(Efflorescence.) AlkaJi Elat, Humboldt Valley(Efflorescence.) 35 [ Spaldings Salt Marsh, Smoky Val- ley Flat, Nevada. (Efflorescence.) 36 j Hot Spring, Ruby Valley - - - (Incrustation.) 37 1 Hot Springs, Humboldt Range(Incrustation.) ^S Hot Springs, Humbuldt Range(Incrustation.) 39 Hot Springs, Humboldt Range; (Incrustation.) 1 40 I Hot Springs, Ruby Valley - -I (Efflorescence.) Steamboat Springs, Geiger Grade -(Incrustation.) Steamboat Springs, Geiger Grade(Incrustation.) 43 Sediment from Hot Sjjrings, ReeseRiver Valley. (Incrustation.) Hot Spring, Grass \allcy(Incrustation.) O. D. Allen - -R. W. Woodward I O. D. Allen R. W. Woodward i LLEL QUATERNARY. 503 In Diamond Valley, between Diamond and Pinon ranges, is a remark-able exposure of tlie I^ower Quaternary, being the bed of an extinct lakecomposed of strata of sand and clay of excessively fine material. Duringthe wet season, and at times throughout the whole year, there is still ashallow lake near the northern end of the valley, which is a strong solutionof sulphate, carbonate, and chloride, in which, however, the carbonate pre-dominates over the sulphate, and at times equals the chloride. During thedi-ier seasons the whole of this broad alkali flat, for a distance of ten orfifteen miles, is a clean, hard, white sheet of alkaline and calcareous clay,which upon drying receives a glaze like hard-finish, and indeed is almostas hard as the plaster upon a wall. Heavy teams driven across it scarcelyleave a wheel-print, and the sun reflects from it as from a marble pavement. In Crescent Valley, between Pinon Ra
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