REVIEWS 
The Geology of the Neighbourhood of Edinburgh. 2d ed. By 
Be Ne beAcH.C. i Croucn, LL. W. Hinsatan, J 5S. GRANT 
WItson, C. B. Crampton, H. B. MAvuFE, and E. B. BAILEY, 
with contributions by J. HorNE, W. Grsson, E. M. ANDERSON, 
and G. W. GRABHAM, and petrographical chapters by J. S. 
Fretr, Memoirs of the Geological Survey, Scotland. Tan- 
Heldescqno: -Rpa44s; figs. 10; maps I. 
Since the publication of the first edition by H. H. Howell and Sir 
Archibald Geikie in 1861, more detailed study has brought about newer 
interpretations, and the development of mining has allowed more dis- 
coveries to be made. The present edition brings up to date the inter- 
pretation of the geology of this district. 
The rocks of the region represent periods of sedimentation, extru- 
sion, and intrusion from the Silurian to the Permo-Carboniferous, from 
which time on there is a hiatus until the Pleistocene and Recent 
which are represented by glacial, lake, and other characteristic deposits. 
The sedimentary formations and the igneous rocks are described in 
great detail, and the paleontology and petrography are very complete. 
One chapter is given to the economic geology, which is limited prin- 
cipally to the coal deposits. 
A complete bibliography covering the geology of the area described, 
is appended. The geologic map of the entire region reported on does 
not accompany the memoir. aie Oe oe 
The Stratigraphy of the Older Pennsylvanian Rocks of Northeastern 
Oklahoma. By D. W. OHERN. Research Bull. No. 4, State 
Univ, Okla. 10910. Pp. 40; table 1;, map tr. 
In this bulletin the Pennsylvania strata are discussed, and a few new 
subdivisions are differentiated and named. The rocks of southeastern 
Kansas, studied by the Kansas geologists, are correlated with those of 
northeastern Oklahoma. ion ae 
Geology and Water Resources of the San Luis Valley, Colorado. 
By C. E. SIEBENTHAL. Water-Supply Paper No. 240, U.S. 
Geol. Survey. Pp. 128; figs. 15; pls. 13. 
The geography of the valley is described with special reference to 
the hydrography. At the point where the Rio Grande leaves the valley, 
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