124 - Scientific Intelligence. 
Mount Diablo is partly made of Miocene Tertiary strata aboundin 
ils. There are also serpentine rocks, actinolite, par and ar 
has been found in the streams running from the 
ere is a mystery as to the econ between ‘the metamorphic 
rocks, including talcose aly serpentine, talc, actinolite and jasper rock 
of the coast region, and the fosstiferous sandstone, which remains to be 
solved. There are serpentine and actinolite associated with the talcose 
slates on the north side of the Bay of San Francisco which were not a_ 
product of eruption, as we know tren observation ; and it Paso to us 
a problem here for future investigation. The hot springs Pr Wam Chuck 
Sacramento.—A calcareous sandstone on Chico creek in the foot hills of 
the Sierra Nevada, as first described by Dr. Trask, contains species 0 
— genera Mactra, Tellina, peer Fusus, Turritella, Natica, etc., along 
with Baculites and Ammonites. Two of the species, a Wucula and Mac- 
tra, according to Conrad, are very similar to miocene fossils of Astoria on 
the Columbia, the WV. divaricata and M. albaria ;* and these have been 
regarded as proving that the deposits, although containing Cretaceous 
genera, Tertiary. But Dr. Newberry observes that it is more prob- 
able, as all the other species are undoubtedly new, that these also are s0, 
and that the deposits ar oe Above Chico Creek the Sacra- 
mento — rapidly narro 
anic Cone near Bios Creek—A cone 500 or 600 feet high occurs 
in Bear Creek Valley, near Fort Reading. It has a crater and there are 
lava streams in its vicinity, and much obsidian with tufa deposits. 
ce 
has described a fine onite from a locality a few miles southwest of 
Fort Reading under the name of Ammonites Batesii, collected by Dr. 
Bates 
East of north of this. fort the mountains contain limestone strata of 
the Carboniferous age, having great thickriess. They were first mentioned 
by Dr. Trask. The fossils are Spirifers, species of Orthis, Encrinal stems, | 
and Cyathophylloid corals, 
Mt. Shasta—Lassen’s Bute—Coal.—Mt. Shasta and aa po 
connect with the Sierra Nevada and bound the elevated plateau of 
interior; the eastern base ne being 4000 feet high 
4000 feet ‘aes the sea. Dr. Newberry no —- 
 Lassen’s Bute isa Large — about 9000 feet in i feldspathic 
lavas covered the region 
ree Sisters—In the ‘ieinity of the parallel -of ee by the head waters | 
a river, the Three Sisters were near by—really five in a 
ei the 10 moe to 11,000 ag in height, the group stands | 
tanding at the pass,—to the 
i Jetiiaen and Mt. Hood were in ‘aight, 
J.D. Dana, Appendix on the Fossils of Astoria by 
