Review of Literature. Ill 
list of the faunas entombed in the strata constituting the Quebec group 
in the Province of Quebec, and reference, etc., points of contact between 
these and similar series in the Newfoundland section. 
On the Lower CamhrianAge of the Stockhridrje limestone. B\' J. E. 
Wolff. Bulletin, G. S. A., vol. ii, pp. 331-338, with two figures ; March 
18, 1891. A detailed description of the structure of the Green mountains 
and western parallel valleys and ridges in Rutland, Vt., is here given 
with a map and a section. The rocks dip steeply eastward and comprise, 
in order from east to west, (1) the Green mountain gneissic schists, with 
beds of conglomerate ; (2) quartzite, proved by Walcott's discoveries to 
belong to the Olenellus zone of the Lower Cambrian ; (3) the limestone 
of the Rutland valley, in which Dr. A. F. Foerste and Dr. Wolff last 
year found fossils at numerous localities, including a Salterella closely 
resembling or Identical with S. ciirvatus of the Olenellus Cambrian of 
North Attleboro,Mass. ; (4) quartzite, conglomerate, gneiss, and schists, 
forming Pine hill ; (5) the limestone of the Center Rutland valley, in 
which Dr. Foerste has detected fossils of Lower Silurian age, like those 
found by Rev. A. Wing in the West Rutland limestone; (6) a belt of 
schists: (7) the limestone of the West Rutland valley; and (8) the 
schists of the Taconic range. The stratigraphy includes overturned 
folds and probably a thrust plain along which the Cambrian is pushed 
westward to overlie the Lower Silurian limestone. 
This paper has an important bearing on the vexed Taconic question, 
since in verifying the stratigraphy of the lower part of the Taconic as 
made out by Dr. Emmons, conforming in that respect with results pub- 
lished in the last number of the Geologist by Mr. Dale, it shows the 
partial incorrectness of the stratigraphic scheme lately published by 
Mr. Walcott, and earlier by Prof. Dana. 
Tlie Oeologi) of Mount Diablo, Calif oDiia. By H. W. Turner. With a 
supplement on The Chemistry of the Mount Diablo rocks, by W. H. Mel- 
ville. Bulletin, G. S. A., vol. ii, pp. 383-414, with a map and three fig- 
ures; March 30, 1891. Mount Diablo, an isolated peak of the Coast ranges, 
lying 27 miles east of San Francisco and rising nearly 4,000 feet from 
the sea level, was selected by Whitney, in the Geological Survey of Cal- 
ifornia, for detailed examination, which resulted in the discovery that 
the greater part of the metamorphic rocks of these ranges are of Creta- 
ceous age. More recently Mr. G. F. Becker, of the U. S. Geological 
Survey, has shown that only the Necocomian or basal strata of the Cre- 
taceous series have been highly silicified, serpentinized, and otherwise 
altered ; and the continuation of this investigation by further field work 
and chemical analyses is described in the present paper. The metamor- 
phism probably took place at the time of the first folding and uplift of 
the Sierra Nevada, which Becker refers to the close of the Gault epoch. 
After this date four terranes, namely, the Chico, Tejon, Miocene, and 
Pliocene, were deposited in succession and conformably with each other 
upon the Mount Diablo area; and the main upheaval of this mountain 
occurred, according to Mr. Turner, at the close of the Pliocene. The 
uplift of the central metamorphic mass was so energetic thai part of the 
strata to the south wei-e thrown into an overturned fold, and in one 
