LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

70 LOWER CRETACEOUS DEPOSITS IN CALIFORNIA. AND OREGON
region about San Francisco Bay (Point San Pedro, Los Gatos, Eayward,
and Corral Hollow), fossils bare been found which are referable to some
part of tbe Horsetown, but the sections are much reduced and the fossils
few. In Oregon, also, only meager evidences of the Horsetown group
have been recorded, as in the valley of Rogue River (Illinois Valley), and
in the valley of the Umpqua River (Riddle, Myrtle Creek, and Dillard),
and on Elk River, Curry County. No evidence has been recorded tbat
Horsetown deposits occur in northern Oregon, or in any part of Washington,
although they seem to occur in British Columbia at a few places.
Qwen CharlcUe Islands,—The Cretaceous deposits of Queen Charlotte
Islands and their faunas are yet only imperfectly known, although they
appear to be richly fossiliferous. Most of the Mesozoic invertebrates
described from these islands have been regarded as either Jurassic or
Upper Cretaceous in ago, and scant information has been found concerning
Lower Cretaceous there. After considerable exploration and an extended
study of the geology of Graham Island, MacKenzie (1916) recognized
only the "Queen Charlotte series" and its divisions proposed by
Clapp, namely, the Haida, Honna, and Skidegate formations. Concerning
this series MacKenzie (1916, p. 65) says, in part:
"The fossils from the Queen Charlotte aeries show theao rocks to be of Upper
Cretaceous age, and Dr. Stanton states that moat of them, judged by European
standards, are no cider than tbe Gault."
This opinion is supported by tbe lists of fossils given by MacKenzie,
but these lists should not be regarded as evidence tbat Lower Cretaceous
deposits do not occur on the island. Whiteaves has figured and described
from these islands many fossil invertebrates of Lower Cretaceous age
which are either identical with, or are near analogues of, molluscau species
occurring in the Horsetown group, sa noted by Stanton (1804, p. 461).
Without claiming to possess a satisfactory knowledge of tbe stratigraphy
of these islands, the following notes are offered as a contribution to their
paleontology. Tbey are intended to indicate only that strata older than
the Gault do occur there and form a considerable part of their stratigraphic
column. The following species have been noted or described by
Wbiteaves (1876):
Pleurotomaria akidegatensis and Nerinea mauderw» Whiteaves were said to have
bean found on Maude Inland, although they do not appear in any of the lists of
MacKentic. They have near Analogues in the lower part of the Horsetown group
in the Cottonwood district of Shasta County,. California.
"Lyloeertw bafsst" White&ves (not Tr&sk) appears to be more nearly related to
Ly later at tratki nov. than told. baUti (Traak), although both ore found in tbe middle
Horsetown of the Cottonwood district.
"Anfijloceraa remandi" Whiteaves (not Gabb) may be compared to 5Aa»i«m'eewa«
yonienle nov., described from the lower Horsetown (Darremmo) beds in tbe Cottonwood
district* California.