Geophysical Abstracts 152 January-March 1953

42 GEOPHYSICAL ABSTRACTS 152, JANUARY-MARCH 1953
14320. Robin, G. de Q. Measurements of ice thickness in Dronning Maud Land,
Antarctica: Nature, v. 171, no. 4341, p. 55-58, 1953.
Using standard seismic reflection techniques, a profile across the ice cap was
determined. In order, the following features were observed: floating ice shelves,
coastal ice hills, mountain ice sheet, and mountain inland plateau. The velocities
in ice were: longitudinal, 3,800 m per sec; shear (?), 1,650 m per sec, and
Rayleigh, 1,050 m per sec. M. C. R.
14321. Con well, C. L. Seismic investigations of areas near Bphrata, Washing­
ton Columbia Basin project: U. S. Bur. Reclamation Geology Rept.
G-120, 23 p., 1952;
Seismic refraction surveys were made in four areas near Bphrata to determine
depth to the top of the basalt bedrock as part of a program of ground water
investigations. The areas chosen were south and southeast of Soap Lake, be­
tween Soap Lake and Lake Lenore, along the west abutment of Long Lake Dam,
and west of the town of Quincy. Two bedrock contour maps were drawn on the
basis of the seismic data. These indicate that a bedrock divide separates Soap
Lake from Lake Lenore, that a .bedrock channel exists starting near the southwest
corner of Soap Lake and trending toward Rock Ford Creek southeast of Soap
Lake, and that a bedrock ridge exists, trending north and south, in the area
southeast of Soap Lake. Depths to bedrock estimated on the basis of seismic
data in the right abutment of Long Lake Dam were found to be inaccurate
"because of the broken fractured condition of the bedrock. M. C. R.
14322. Innes, Arland I. The seismic history of southwestern New Mexico:
Geophysics, v. 18, no. 1, p. 142-159,1953.
Seismic exploration for oil in southeastern New Mexico was begun by the
Amerada Petroleum Corp. and the Gulf Oil Co. early in 1928 when two crews of
the Geophysical Research Corp. initiated seismic refraction profiling. Refrac­
tion profiling continued through 1931, and in 1932 a program of correlation
refraction shooting was initiated when it was found that a deeply buried lime
could be mapped on second arrivals. Correlation refraction shooting was con­
tinued into 1935. From 1934 to 1950 reflection shooting was dominant. The
early refraction profiling detailed the Hobbs structure and led to the discovery
of the Monument field early in 1935. Reflection profiling was credited in the
American Association of Petroleum Geologists Bulletin for June 1950 with locat­
ing the Knowles, Bagley, Hightower, Cross Roads, Denton and Bough oil fields.
Three other oil fields were also probably located by the reflection seismograph.
L. C. P.
MICROSEISMS
14323. Gilmore, M. H. Frontal microseisms: Am. Meteorol. Soc. Bull., v. 32,
no. 11, p. 346,355,1951.
The data presented in this paper concerning frontal microseisms, together
with data previously published concerning tropical storm microseisms, lead to the
conclusion that most microseisrnic storms are a direct function of the wind force,
the density of the air mass involved and the area over which the force acts.
Most reliable sources of information also lead to the conclusion that micro-
seismic storms are generated on the ocean bottom directly under the storm area,
probably by means of compression al water waves set up by the storm. Author's
A ~bstra.ct