Klamath Mountains, Califoniia. — Hcrshey. 245 
Clear Creek volcanic series on the east has been seen, but upon 
recognition of the serpentine as an altered intrusive, the evi- 
dence of the importance (because of great throw) of this fault 
becomes very weak. Where the same fault is due south of the 
Trinity river, the Bragdon slate is in direct contact with the 
schists and I am inclined to believe that it is a faulted contact 
with a considerable but indeterminable throw. 
I have long suspected that the profoundest fault of the 
territory may occur along the contact between the eastern 
schist belt and the Paleozoic belt west of it. This line runs 
straight for many miles. Usually the contact goes down from 
the mountain tops to the valley bottoms nearly or quite verti- 
cally ; indeed, just south of the South Fork of the Salmon river 
the contact may be inclined tovs^ard the schist area. The horn- 
blende schist and the mica schist as bordering the Paleozoic 
rocks change places several times. So far the evidence is in 
favor of faulting. 
North of the King Solomon mine, in Siskiyou county, the 
Paleozoic series has, next to the schists, a formation of 
squeezed and crushed, fine conglomerate which appears :iO be 
the "basal conglomerate" of this series. This basal formation 
could not here be in contact with the schists unless practically 
an original or unfaulted contact. At the La Grange hydraulic 
mine near Junction City in Trinity county, the Paleozoic slates 
pass over on to the hornblende schists and in places rest upon 
it horizontally and with such an irregular contact as to pre- 
clude the idea of faulting. The nature of this line separating 
the schists from the Paleozoic strata is a matter of considerable 
interest and should receive attention in the near future. 
■ Where I examined the contact between the Paleozoic slates 
and the schists of the western belt, in the valley of the South 
Fork of Trinity river, near the mouth of Rattlesnake creek, it 
is apparently not a faulted one. The surface of the schists 
seems to have been hummocky and the Paleozoic sediment^ ac- 
cumulated first in the depressions. The slates dip northeaster- 
ly at a high angle and the contact is consequently sinuous on a 
small scale. 
The joint planes constitute another structural form present 
to an interesting degree in the Klamath region, but the studv 
of them has not yet progressed to tlie point of generalization. 
Berkeley, Cal, Jan. 13, 1903. 
