Metamorphic Rocks.—luirbanks. 1538 
Manganopektolith, ein neues Pektolithiihnliches Mineral, von Magnet 
Cove, Arkansas. Zedtschrift fiir Krystallographic, xvi, 886, 1890. 
Eudialyte and Eucolite from Magnet Cove, Arkansas. Amer. Jour. 
Set. 11, XL. pp. 457-462. Dec., 1890. 
Tests of some Arkansas syenites, Ladlroad and Enginzering Journal. 
Vol nav, 1891. p. 18. 
R. N. Brackett and J. Francis Williams, Newtonite and Rectorite. 
Two new minerals of the Kaolinite Group. Amer. Jour. Sci. 111. XLII. 
pp. 11-21. July, 1891. 
Annual Report Geological Survey of Arkansas, 1890. Vol. 11. The 
Igneous Rocks of Arkansas, pp. 457 and maps. 1891. 
THE PRE-CRETACEOUS AGE OF THE METAMOR- 
PHIC ROCKS OF THE CALIFORNIA COAST 
RANGES. 
By Haroip W. FarrBanks, B.S., of San Diego, Cal. 
While engaged upon the State Geological Survey, during the 
past summer, [ was called on to make an examination of Shasta 
and Trinity counties. At the close of this work, the main range 
of the coast mountains was followed southward through Tehama, 
Colusa, Lake and Napa counties, nearly to Martinez. 
The results obtained, while of a most interesting nature, ditfer 
so radically from those of former investigators in this field, that 
though I am satisfied that they are, in the main, correct, yet I 
feel some diffidence in proposing them on account of the opposite 
views held by so many well known geologists. 
If my views are correct it seems very remarkable that such 
serious mistakes should have been entertained with regard to the 
Coast Range geology, not only by the former state survey, but 
also by most of the other students in this field up to the present 
time; and it is apparent that, from the earliest beginnings of 
geological work in this state, the relation between the metamor- 
phosed and unmetamorphosed rocks of the ranges near the coast, 
from San Diego to Del Norte counties, has been entirely misun- 
derstood. 
The views which I hold, based almost entirely upon field study 
in the region in question, and which I can substantiate by actual 
occurrences, are the following: 
1. The impossibility, from a physical standpoint, of drawing 
the line between the Coast Ranges and the Sierra Nevada, 
