The role of larval Chironomidae in the production of lacustrine copropel in Mud Lake, Marion County, Florida
A. J. Iovino, W. H. Bradley
1969, Limnology and Oceanography (14) 898-905
Mud Lake is a shallow (avg 45 cm), alkaline (pH 7.7–10.2), brown‐water lake having an area of about 180 ha. A study of its organic sediment was undertaken because it appears to be a present‐day analogue of the richly organic lacustrine oozes that were the precursors of the oil shales...
Profiles of regional ground-water flow in glacial deposits in Minnesota based on existing well data
W. A. Van Voast
1969, Conference Paper
No abstract available....
Ground water for irrigation near Lake Emily, Pope County, west-central Minnesota
W. A. Van Voast
1969, Report
No abstract available....
Graphs of ground-water levels in Minnesota, 1962-1966
W. A. Miller, G.C. Straka
1969, Report
No abstract available....
Implications of the Surveyor 7 results
R. A. Phinney, J. A. O’Keefe, J. B. Adams, D. E. Gault, G. P. Kuiper, H. Masursky, R. J. Collins, Eugene Merle Shoemaker
1969, Journal of Geophysical Research (74) 6053-6080
The chemical and television data from the Surveyor 7 mission are discussed. The significance of the α-scattering analysis is found to depend on whether the flow unit underlying the spacecraft was laid down by mass flow at the time of the Tycho-forming impact. The chemical composition of...
The new federal OCS regulations in the light of Santa Barbara
Russell G. Wayland
1969, Conference Paper, SPE California regional meeting
When the first Outer Continental Shelf leases were issued in 1954, the oil industry was operating near shore in shallow waters. Although regional OCS Orders issued under the regulations have been kept reasonably up to date with advancing technology, the Secretary's regulations had not undergone a complete review by the...
Great Salt Lake, Utah: Chemical and physical variations of the brine, 1963-1966
D. C. Hahl, A.H. Handy
1969, Utah Geological and Mineralogical Survey Water-Resources Bulletin 12
Great Salt Lake is a shallow, closed-basin lake in northern Utah. Its surface area and concentration of dissolved solids vary in response to both annual and long-term climatic changes. The lake gains water mainly as streamflow from mountains to the east and loses water through evaporation. In 1965, at a...
Mud Lake, Florida: Its algae and alkaline brown water
W. H. Bradley, M. E. Beard
1969, Limnology and Oceanography (14) 889-897
Mud Lake (Marion County, Florida), in the Ocala National Forest, is elliptical, has an area of ca. 180 ha, and a mean depth of less than 50 cm. The water contains about 200 ppm dissolved solids, ranges from brown to nearly colorless (15 to 100 Pt units),...
Glaciation on the continental margin off New England
Richard M. Pratt, John Schlee
1969, Geological Society of America Bulletin (80) 2335-2341
The Pleistocene glacial limit in the marine environment off New England can be traced by plotting the seaward limit of abundant sandy gravel and the position of shoals. Maximum limit of the last glaciation was probably along an irregular line extending through Nantucket Shoals, across...
Casing detector and self-potential logger
Michael H. Frimpter
1969, Groundwater (7) 24-27
A simple and rapid method of determining casing length and permeable zones in wells tapping bedrock can be useful to well drillers and hydrologists. A device consisting of a galvanometer, a reel of insulated wire, and a copper...
Fission-track ages of accessory minerals from granitic rocks of the central Sierra Nevada batholith, California
C. W. Naeser, F. C. W. Dodge
1969, Geological Society of America Bulletin (80) 2201-2211
Ages of apatite, sphene, allanite, epidote, and garnet from plutonic rocks of the central Sierra Nevada and Inyo Mountains have been determined by the fission-track method.Ages of 44 specimens of apatite range from 54 to 128 m.y. Oldest apatites generally occur in rocks from the western portion of the batholith;...
On the use of magnetic cleaning in paleointensity studies
Richard R. Doell, Peter J. Smith
1969, Journal of Geomagnetism & Geoelectricity (21) 579-594
The use of partial alternating field demagnetization and, to a lesser extent, partial thermal demagnetization has been found useful as a means of removing secondary components of magnetization from rocks used in certain methods of determining paleointensities. During the course of this investigation, which was carried out on lavas erupted...
Effect of rainfall variability on streamflow simulation
D.R. Dawdy, James M. Bergmann
1969, Water Resources Research (5) 958-966
Three recording rain gages in a 9.7‐square‐mile basin in southern California were used with a deterministic rainfall‐runoff model to simulate flood hydrographs and peaks and to assess the effects of data errors on simulation results. Bias in the estimation of effective basin rainfall seemed to result in curve fitting parameter...
International geophysics: Symposium on the hydrology of deltas
Ted Arnow
1969, Eos Science News (50) 556-556
A Symposium on the Hydrology of Deltas was held in Bucharest, Romania, on May 6–9; it was followed by a field trip to the delta of the Danube River on May 10–14. The Symposium was organized by Unesco, with the collaboration of the Romanian Government and the support of the...
The use of Schlumberger and equatorial soundings in groundwater investigations near El Paso, Texas
Adel A. R. Zohdy
1969, Geophysics (34) 713-728
Electrical soundings using the symmetric AMNB Schlumberger and the bipole-dipole equatorial arrays were made along two profiles near El Paso, Texas, in support of a groundwater exploration program which included seismic refraction and gravity surveys. Electrode spacings (AB/2 or R) reaching 12,000 ft allowed exploration to depths of about 7000...
The U.S. Geological Survey's gravity program in California
Howard W. Oliver
1969, Eos Science News (50) 543-545
Since the 1963 gravity symposium, the U.S. Geological Survey has entered into a cooperative program with the California Division of Mines and Geology, the Army Map Service, and several universities for the purpose of completing a 5-mgal Bouguer gravity map of the entire State of California at a scale of...
Progress on a gravity map of Alaska
David F. Barnes
1969, Eos Science News (50) 550-552
The U.S. Geological Survey began gravity surveys in Alaska ten years ago with local surveys in the Copper River and Tanana Basins. Shortly before the 1963 AGU gravity symposium [Barnes, 1965], the emphasis shifted from local surveys to the preparation of a reconnaissance gravity map of the whole state with...
The structure and tectonic history of the eastern Aleutian Trench
Roland E. von Huene, George G. Shor Jr.
1969, Geological Society of America Bulletin (80) 1889-1902
The tectonic character of the eastern Aleutian Trench and some major events in its geologic history can be estimated from nine continuous seismic reflection records. A section of pre-trench, deep oceanic sediments rests on the down-warped crust that forms the trench. Nearly horizontal undeformed strata that unconformably overlie this deep...
Significance of lineation and minor folds near major thrust faults in the southern Appalachians and the British and Norwegian Caledonides
Bruce Bryant, John C. Reed Jr.
1969, Geological Magazine (106) 412-429
The Blue Ridge thrust sheet is one of the principal thrust masses of metamorphic rocks in the southern Appalachians. A broad zone of sheared and retrogressively metamorphosed rocks near the sole of the thrust sheet around the Grandfather Mountain window displays numerous small tight or isoclinal folds having axes subparallel...
Rheology of basalt in the melting range
Herbert R. Shaw
1969, Journal of Petrology (10) 510-535
Experimental data have been obtained for viscosities of tholeiite melts at temperatures from 1300 to 1120 °Cat 1 atm, using a concentric cylinder viscometer. The apparent viscosity increases more than two orders of magnitude between 1200 and 1120 °C (0–25 per cent crystallization) for shear rates of about 10 sec-1 and...
The U.S. Geological Survey's gravity program in the Rocky Mountain and Basin Range areas
M. Dean Kleinkopf, Donald L. Peterson
1969, Eos, Transactions, American Geophysical Union (50) 529-531
Most of the gravity surveys of the U.S. Geological Survey have been support programs in connection with regional geologic structural studies, ground-water investigations, and heavy-metals exploration. Many of the studies were undertaken in conjunction with geological mapping and mineral...
Standardization of gravimeter calibrations in the geological survey
David F. Barnes, Howard W. Oliver, Stephen L. Robbins
1969, Eos Science News (50) 526-527
The calibration of gravimeters has long been primarily the concern of geodesists involved in measuring large gravity differences, but recent developments suggest that the precision and stability of gravimeter calibrations may have greater geologic importance in the future. First, the use of high-speed computers and an increasing variety of supplemental...
Establishing hunting regulations and allowable harvest of mallards in the United States
A. D. Geis, R. K. Martinson, David R. Anderson
1969, Journal of Wildlife Management (33) 848-859
As a major part of establishing hunting regulations each year in the United States, data for the mallard (Anas platyrhynchos) are examined extensively to estimate the effect of various harvest strategies on the breeding population the following spring. This requires estimates of the breeding-population level and of the production, harvest,...
Inorganic composition of gallbladder bile from fasted rainbow trout
Joseph B. Hunn
1969, Progressive Fish-Culturist (31) 221-222
Abstract not available. ...
Some aspects of the effects of the quantity and quality of water on biological communities in Everglades National Park
Milton C. Kolipinski, Aaron L. Higer
1969, Open-File Report FL 69-007
No abstract available....
