REVIEWS 573 
The Cretaceous beds are sedimentary and less thick than the preceding 
ones. . 
The thickness of the Kenai formation ranges from 150 to 10,000 feet 
and embraces widely distributed outcrops of conglomerates, sandstones, 
shales, and coal beds. The last period of diastrophism followed Eocene 
deposition. Glaciation has been an important factor in the development 
of the present topography. 
Gold and coal are the important resources; bituminous coal is of 
far more commercial importance than the lignites. 
EeaAwS: 
The Geology of the Greymouth Subdivision, North Westland, New 
Zealand. By Percy GATES MorGAN. Bull. 13 (New Series), 
Geological Survey Branch of the Department of Mines. Pp. 
160; pls. 6; figs. 7; maps 8; sections 3. 
This area is located along the northwest shore of North Westland 
and includes about 510 square miles. The oldest rocks are strongly 
folded argillites and graywackes known as the Greenland series. These 
are pre-Tertiary in age, no closer correlation being offered. Next 
younger than these are the coal measures, of probable Eocene age, 
consisting of sandstones, conglomerates, shales, and mudstones. Some 
valuable coal seams are also included. Four divisions are recognized: 
the Paparoa beds of shale and sandstone; the Brunner grits, conglom- 
erates, and sandstones; the Island sandstone; and the Kaita mudstone. 
It is believed that glaciers existed in the highlands which were furnishing 
sediments at this time. 
Miocene deposits are largely marine, and contain abundant fossils 
in some localities, so that the age of the rocks is well established. Plio- 
cene exposures are limited. Pleistocene morainic and _fluvio-glacial 
gravels show that a cold climate prevailed at that time. The gravels 
are everywhere auriferous. 
The principal economic resources are the coal beds. The amount 
of coal in the ground is estimated at 600,000,000 tons, about one-fourth 
of which is available under present conditions. There are indications of 
petroleum. 
BAGS: 
