Ground-water supplies of the Ypsilanti area, Michigan
Charles L. McGuinness, O.F. Poindexter, E. G. Otton
1949, Water Supply Paper 1078
As of the date of this report (August 1945), the major water users in the Ypsilanti area are: (1) the city of Ypsilanti, (2) the Willow Run bomber plant, built by the Federal Government and operated by the Ford Motor Co., and (3) the war housing project of the Federal...
Volcanic activity on Umnak and Great Sitkin Islands, 1946–1948
F.M. Byers Jr., W. W. Brannock
1949, Eos, Transactions, American Geophysical Union (30) 719-734
As part of the United States Geological Survey's volcano program in the Aleutian volcanic arc during 1946–1948, the volcanoes and thermal areas on Umnak and Great Sitkin Islands were studied. In addition to observation of the volcanoes, temperatures of fumaroles were measured and some products of the volcanic activity were...
Submarine geology and topography in the Northern Marshalls
K.O. Emery, J. I. Tracey Jr., H. S. Ladd
1949, Eos, Transactions, American Geophysical Union (30) 55-58
The atomic bomb tests at Bikini in 1946 provided an opportunity to study the characteristics of atolls using modern surveying techniques. The work has shown that many of the important features, both above and below sea level, are definitely related to the direction of the prevailing winds, waves, and currents....
Fourth special report of the Hawaiian Volcano Observatory of the U.S. Geological Survey and the Hawaiian Volcano Research Association: Steam blast volcanic eruptions: A study of Mount Pelée in Martinique as type volcano
T. A. Jaggar
1949, Report
The investigation is concerned with the author's expedition to Martinique and St. Vincent in 1902 and comparison of the experience of investigators and sufferers with that of others in so-called "explosive" eruptions. The Hawaiian mechanism is reviewed with special reference to rifts, underground water, intrusion furnace, wedge rupture, and lowering...
The present status of the United States commercial fisheries of the Great Lakes
John Van Oosten
1949, Transactions of the North American Wildlife Conference (14) 319-330
This review of the trends in production on the Great Lakes suggests that great biological changes have taken place. The general abundance of the choicer varieties, and of some of the less choice fishes, has been lowered considerably; and the prospects are that this level will fall still farther....
Progress report on the sea lamprey study
John Van Oosten
1949, The Fisherman (17) 6, 9-10
SUMMARY: The Peromyscus leucopus on a 17-acre study area were live-trapped, marked, and released over a seven-day period. On the three following nights intensive snap-trapping was done on the central acre of the study plot. The animals caught by snap traps in...
Le stereorestituteur Kelsh
H. T. Kelsh
1949, Photogrammetria (6) 123
Le stéréorestituteur Kelsh est un appareil de restitution à double projection basé sur le principe des anaglyphes, comme le Multiplex par exemple, mais il a une plus grande précision que ce dernier, vu que les négatifs sont utilisés directement pour la restitution, sans que l'on soit obligé de les réduire...
Geology applied to modern highways
Leo Maddalena
1948, Open-File Report 48-17-D
"Geology applied to modern highways", by Leo Maddalena, is a study of the contribution of geologic work to the construction of a heavy-duty highway through rugged terrain in the Apennine Mountains of Italy....
Some solutional features of the limestone near Lexington, Kentucky
D.K. Hamilton
1948, Economic Geology (43) 39-52
Field work on the Ordovician limestones and shales of the Lexington area, Kentucky, has shown that no appreciable quantity of ground water is transmitted through interstitial openings in these rocks. Ground-water movement is restricted to joint planes and, to a lesser extent, bedding planes that have been enlarged by solution....
Geology and ground-water resources of Iwo Jima
F. A. Swenson
1948, GSA Bulletin (59) 995-1008
Iwo Jima, in the western Pacific Ocean, consists of Motoyama, a broad volcanic cone, at the north, and Mt. Suribachi at the south, with an undulating isthmus between. Motoyama is largely light-gray-buff tuff. A thick andesitic lava flow under Suribachi, exposed in several places, is overlain by a thick deposit...
Precedence of modern plant names over names based on fossils
James M. Schopf
1948, Science (108) 483
No abstract available....
Runoff from rain and snow
A. M. Piper
1948, Eos, Transactions, American Geophysical Union (29) 511-524
The basic principles of the idealized hydrologic cycle are reviewed with emphasis on storage and movement of water in the soil. A distinction is made between ground‐water runoff and overland runoff in terms of storage and lag, expressed as accumulated deviations from uniform flow over a period of several years....
Geology and ground water of the Casablanca Basin, Chile
G. C. Taylor Jr.
1948, Economic Geology (73) 661-674
"In the uplands the Cretaceous granodiorite and granite contain water in the weathered zones, and in joints and fractures. These yield small supplies of good water to springs and to shallow domestic and stock wells. The alluvial fill of the lowlands contains a zone of saturation that is sustained by...
Batholith and associated rocks of Corona, Elsinore, and San Luis Rey quadrangles southern California
Esper S. Larsen Jr.
1948, GSA Memoirs
The batholith of Southern and Lower California is exposed continuously from near Riverside, California, southward for a distance of about 350 miles. In central Lower California it is covered in part by younger rocks, but discontinuous bodies extend to the southern end of Lower California, and hence the batholith is...
Geologic features of dam sites in the Nehalem, Rogue, and Willamette River basins, Oregon, 1935-37
A. M. Piper
1947, Open-File Report 47-12
The present report comprises brief descriptions of geologic features at 19 potential dam sites in the Nehalem, Rogue, and Willamette River basins in western Oregon. The topography of these site and of the corresponding reservoir site was mapped in 1934-36 under an allocation of funds, by the Public Works...
Structure contour map of the surface rocks of the Model anticline, Las Animas County, Colorado
N. W. Bass, C.E. Straub, H.O. Woodbury
1947, Oil and Gas Investigation Map 68
Geology of the lead-silver deposits of the Clark Fork district, Bonner County, Idaho
Alfred Leonard Anderson
1947, Bulletin 944-B
This report gives the results of a reinvestigation of the lead-silver deposits of the Clark Fork district, Bonner County, Idaho, which since the late twenties have been the most important producers of lead-silver ore in northern Idaho outside of the Coeur d'Alene district, their production up to the end of...
Cobalt-copper deposits of the Blackbird district, Lemhi County, Idaho
J. S. Vhay
1947, Open-File Report 48-1
The Blackbird district is in east-central Idaho, about 20 miles west-southwest of Salmon. The area is one of deeply weathered, flat-topped upland surfaces cut by several steep-walled valleys, which are tributary to the canyon of Panther Creek. Most of the area has a heavy vegetative cover and outcrops are relatively...
Part 3: Volcano investigations on Umnak Island, 1946
F. M. Byers Jr., D.M. Hopkins, K. L. Wier, Bernard Fisher
1947, Report, Alaskan Volcano Investigations Report No. 2
Umnak Island is a dumbbell-shaped island in the eastern part of the Aleutian Islands. The island is 70 miles long and trends northeast-southwest. During 1946 volcano investigations were begun on the island and geologic mapping of most of northeastern Umnak Island was completed.Okmok Volcano, a large, broad volcanic mountain rising...
Chemical analyses and calculated modes of the Oliverian magma series, Mt. Washington Quadrangle, New Hampshire
M.P. Billings, J.C. Rabbitt
1947, GSA Bulletin (58) 573-596
Complete chemical analyses, including the spectrographic determination of 44 trace elements, have been made of six representative specimens from each of the six map units constituting the Oliverian magma series in the Mt. Washington quadrangle of New Hampshire. Potash is systematically higher than soda. An increase in silica, which ranges...
Geology of the Borah Peak quadrangle, Idaho
C. P. Ross
1947, GSA Bulletin (58) 1085-1160
This report is on result of a long program of geologic investigation in south-central Idaho, undertaken as an aid in the development of the mineral resources of the region. This quadrangle was examined because of the exceptional opportunities for the study of stratigraphy and structure afforded by the Lost River...
Geology and ground-water resources of Puerto Rico
Charles Lee McGuinness
1947, Economic Geology (42) 563-571
Puerto Rico, the easternmost and smallest of the Greater Antilles, has an axis of deformed and metamorphosed volcanic rocks of Upper Cretaceous age, intruded by dioritic rocks during the Antillean revolution. The hard-rock core is flanked on the north and south by limestones and clastic rocks of late Oligocene and...
Radioactivity of the rocks of the batholith of southern California
Esper S. Larsen Jr., N.B. Keevil
1947, GSA Bulletin (58) 483-494
Determination of radioactivity has been made on 43 rocks, carefully selected from the different mapped units of the complex Cretaceous batholith of Southern California; they range from gabbro to granite. The activity of the gabbro averages about 0.3 alphas/mg./hr., that of the tonalites, 0.8, the granodiorite 1.3, and the granites...
Petrology and structure of the Moa Chromite district, Oriente Province, Cuba
P. W. Guild
1947, Eos, Transactions, American Geophysical Union (28) 218-246
Chromite deposits In the Moa district, on the north coast of Oriente Province, Cuba, form one facies of the ultramafic complex in which they occur. Two planar structures, one a compositional layering due to variations in the relative proportions of olivine, pyroxene, plagioclase feldspar, and chromite, and the other a...
Copper deposits at the Rush and Brown mine and Venus prospect, Prince of Wales Island, southeastern Alaska
L.A. Warner, R.G. Ray, G.M. Flint Jr.
1946, Open-File Report 46-16
The Rush and Brown mine and the Venus prospect are near the head of Kasaan Bay about 10 miles northwest of the village of Kasaan and about 45 miles northwest of Ketchikan, the nearest port. (See fig. 1.) They are in an area of moderate relief in in which some...
