REVIEWS 89 
Coals and Structure of Magoffin County, Kentucky. By Itry B. 
BROWNING and Puitip G. RUssELL. Frankfort: Kentucky 
Geological Survey, 4th Series, Vol. V, Pt. II, with geologic 
ection and maps, 1919. Pp. x+552. 
This is a detailed report on the subject named in the title. The 
columnar section accompanying the report shows twenty-three beds of 
coal, not all workable, most of which are in the Pottsville Series. It is 
stated that only three horizons in the 1,200 foot section are sufficiently 
persistent and well defined to be serviceable as horizon markers. It is 
stated that all the strata exposed are of marine origin. 
RD ES: 
Oil and Gas Resources of Kansas. By RAaymonp C. Moore and 
Winturop P. Haynes. Lawrence: State Geological Survey 
of Kansas, Bulletin 3. 391 pages, 4o plates. 
The volume contains a historical sketch of the oil and gas industry of 
the state, and brief discussions of a general nature on (x) the origin 
of oil and gas, (2) their migration and accumulation, and (3) methods 
of production, refining, etc. These discussions are followed by a sum- 
mary of the stratigraphy of Kansas (pp. 78-173), including the fullest 
account to date of the sub-surface crystalline rocks of the state. These 
rocks (granite) are said to constitute a buried ridge nearly 175 miles 
long and 10 to 25 miles wide, trending in a northeast-southwest direction 
(really north-northeast, south-southwest) from the Nebraska line near 
Bern, to northern Butler County. Its highest elevation is at the north, 
where its top is about 600 feet below the surface, and its maximum 
height above the surrounding crystalline rock floor probably is 2,500 feet 
or more. The age of the granite is conjectured to be pre-Cambrian, 
and to have been uplifted in the late Mississippian or early in the 
Pennsylvanian. 
These preparatory chapters precede the main topic of the bulletin, 
the production of oil in Kansas (pp. 194-397). Most of the oil of the 
state is from the Pennsylvanian system, but the Permian, and perhaps 
the Mississippian, have yielded some. The production of oil in 1916, 
the last year for which data are given, was about 8,750,000 barrels, 
more than twice that of any preceding year. In 1916 more than 3,600 
new wells were completed, about ro per cent of them dry. 
Asmall but clear geological map of the state accompanies the volume, 
also a map showing the distribution of oil and gas. 
