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Page 6398, results 159926 - 159950

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Preliminary chemical correlation of chromite with the containing rocks
Thomas P Thayer
1946, Economic Geology (41) 202-217
Chromite investigations of the U. S. Geological Survey since 1939 indicate that economic deposits of chromite rich in normative spinel ((Mg, Fe)Al 2 O 4 ) occur in peridotites which are closely associated with gabbro; high-chrome chromites occur in feldspar-free peridotites; and chromites rich in both normative chromite ((Mg, Fe)Cr 2 O 4 ) and magnetite (FeFe 2 O 4 ) are...
General principles of artificial ground-water recharge
O. E. Meinzer
1946, Economic Geology (41) 191-201
The natural subterranean reservoirs formed by the porous and permeable rocks differ from surface reservoirs chiefly in that they have complex structure and great internal resistanc• to the How of water. Their full utilization requires systematic development based on the geology and hydrology of the aquifer and the principles of...
Artificial recharge of artesian limestone at Orlando, Florida
A.G. Unklesbay, H.H. Cooper
1946, Economic Geology (41) 293-307
The principal aquifer in the Orlando area consists of 900 feet or more of permeable artesian limestones of upper and middle Eocene age. As in most other parts of the Florida peninsula, these limestones are overlain by the Hawthorn formation of Miocene age which contains relatively impervious beds. The Hawthorn...
The quartz crystal deposits of western Arkansas
A.E.J. Engel
1946, Economic Geology (41) 598-618
Extensive geological investigations of domestic deposits of quartz crystals were undertaken by the Geological Survey of the United States Department of the Interior in the fall of 1942 in response to the urgent demand for crystals for war purposes. The work was continued throughout 1943 and took survey geologists into...
Artificial recharge of productive ground-water aquifers in New Jersey
H.C. Barksdale, G.D. DeBuchananne
1946, Economic Geology (41) 726-737
Artificial recharge by water spreading is practiced in several places in New Jersey. Rates of recharge ranging from 3,000 to 125,000 gallons per acre per day have been measured at the Perth Amboy Water Works, where artificial recharge of the Old Bridge sand, of upper Cretaceous age, has been practiced...
Hydrothermal alteration in the Castle Dome copper deposit, Arizona
Nels P. Peterson, Charles Gilbert, G.L. Quick
1946, Economic Geology (41) 820-840
Hydrothermal alteration of the quartz monzonite host rock in the Castle Dome copper deposit consists of three phases. Very weak propylitic alteration of biotite and plagioclase occurs in the marginal part of the mineralized area. Where mineralization is stronger most of the plagioclase and some of the orthoclase and biotite...
Facts about ANTU
U.S. Division Of Wildlife Research
1946, Wildlife Leaflet 288
No abstract available....
Facts about 1080
U.S. Division Of Wildlife Research
1946, Wildlife Leaflet 287
No abstract available....
Trace elements investigations in the Sweepstakes Creek area, Koyuk district, Seward Peninsula, Alaska
H. Richard Gault, Robert F. Black, John B. Lyons
1946, Trace Elements Investigations 25
A significant content of radioactive material was recognized in a few placer concentrates from Sweepstakes and Rube Creeks in the Koyuk district of eastern Seward Peninsula, Alaska, when old collections were scanned for radioactivity in the spring of 1945. Subsequent field investigations with a Geiger-Mueller counter were made of the...