Occurrence of Fossils in the Auriferous Slates of California.
BY PROF. W. H. BREWER.
I find in published Proceedings of the Academy, just received, that some remarks I made at the meeting of October 3d, 1864, were not published, that I wish recorded.
In the discussion on the occurrence of fossils in the auriferous rocks of California, I stated that fossils had been found by the Geological Survey, in the rocks associated with gold, along a line nearly 300 miles in length, extending from Pitt River to the Mariposa Estate; that the associated rocks of similar age, bearing gold, had been traced upwards of 550 miles in the Sierra Nevadas, and that Jurassic fossils had been found in the “auriferous slates,” along a belt of 200 miles of this distance, and that both Jurassic and Triassic fossils had been found in considerable numbers near and in Genesee Valley, Plumas Co.