Page 194 - calmining1890

188 REPORT OF THE STATE MINERALOGIST.

streams, and have made exposures showing the diversified dips of the
strata, varying from horizontal to 80 degrees. Throughout this region
evidences of the flows of old river channels from the Sierra side are
seen, which have cemented and become conglomerate, and been upheaved
in the general uplifting of the range. In Sec. 15, T. 21 S., R. 14 E., on

WALTHAM^CK FLAT SANDSTONE ANDCLAYSHAU
SEC. 15 T. 21S. R.IIE. M.D.M.

the northern side of the county road, the hills rise abruptly from the
road to an altitude of five hundred feet. The strata are almost hori-
zontal, of hard sandstone, clay shale, and, within about one hundred
feet from their summits, beds of puddingstone or conglomerate, varying
in thickness from ten to twenty feet, and continuing for a long distance,
finally lessening to a feather edge and disappearing entirely.

'
SANOSTONC AND
SEC. 12 T. 21 S. R. 13 £. M. D. M.
Again, in Sec. 12, T. 21 S., R. 13 E., on the left bank of Hot Springs
Creek, a branch of Waltham Creek, which cuts longitudinally through
the formation at this point, shows that the conglomerates assume an
angle of about 75 degrees with the sandstones and shales, and on the
crests and edges of the hill overlap as if poured upon it.