Method and importance of obtaining humic and fulvic acids of high purity
Ronald L. Malcolm
1976, Journal of Research of the U.S. Geological Survey (4) 37-40
A detailed procedure incorporating centrifugation, pressure filtration, dialysis, resin exchange, and freeze drying is given for the extraction and purification of fulvic and humic acids from soils and sediments. By use of the procedure humic acids have been prepared which have less than 0.22 percent ash. The isolation of relatively...
Behavior of trace elements during magmatic processes - A summary of theoretical models and their applications
Joseph G. Arth
1976, Journal of Research of the U.S. Geological Survey (4) 41-47
Progress in understanding the behavior of trace elements during the processes that produce igneous rocks has been made possible by the parallel development of theoretical models to describe that behavior and analytical techniques that permit precise measurement of trace-element concentrations in igneous rocks and minerals. The result of this progress...
Petrology of the Paloma Valley ring complex, southern California batholith
D. M. Morton, A.M. Bard
1976, Journal of Research of the U.S. Geological Survey (4) 83-89
The Paloma Valley ring complex is one of the numerous plutons that make up the Cretaceous southern California batholith. The complex is composite, consisting of (1) an older, single ring dike and two subsidiary short-arced inner dikes, and (2) a younger set of thin short-arced dikes largely inside the older...
Oxygen isotopes of some trondhjemites, siliceous gneisses, and associated mafic rocks
F. Barker, I. Friedman, D.R. Hunter, J.D. Gleason
1976, Precambrian Research (3) 547-557
Analyses of oxygen isotopes in whole-rock samples of 58 Precambrian and Phanerozoic trondhjemites and siliceous gneisses and of 28 cogenetic mafic to intermediate rocks from North America, Fennoscandia, and southern Africa give the following results: 1. (1) 47 trondhjemites, tonalites, and mostly Archean acidic gneisses that apparently are not isotopically...
Holocene sedimentation history of the major fan valleys of Monterey fan
G.R. Hess, W. R. Normark
1976, Marine Geology (22) 233-251
There are three major fan valleys on upper Monterey fan. Deep-tow geophysical profiles and 40 sediment cores provide the basis for evaluation of the sedimentation histories of these valleys. Monterey fan valley leads from Monterey canyon to a major suprafan and is bounded by levees that crest more than 400...
Large sand waves on the Atlantic Outer Continental Shelf around Wilmington Canyon, off Eastern United States
H.J. Knebel, D. W. Folger
1976, Marine Geology (22) M7-M15
New seismic-reflection data show that large sand waves near the head of Wilmington Canyon on the Atlantic Outer Continental Shelf have a spacing of 100-650 m and a relief of 2-9 m. The bedforms trend northwest and are asymmetrical, the steeper slopes being toward the south or west. Vibracore sediments...
Revised Miocene and Pliocene diatom biostratigraphy of Upper Newport Bay, Newport Beach, California
J.A. Barron
1976, Marine Micropaleontology (1) 27-63
North Pacific diatom zones XXIII through IX of Schrader are recognizable in the middle Miocene to lower Pliocene stratigraphic section exposed around Upper Newport Bay in Newport Beach, California. Correlation with DSDP Site 173 and other stratigraphic sections in California allows the selection of diatom datums that are the most...
Recent limnological changes in southern Kootenay Lake, British Columbia
James E. Cloern
1976, Canadian Journal of Zoology (54) 1571-1578
n response to a significant abatement of phosphate loading and the construction of a dam on its major inflow (the Kootenay River), southern Kootenay Lake experienced a number of limnological changes between 1969 and 1974. Water temperatures in 1974–1975 were similar to those previously reported for 1966–1969. However, water transparency...
Geologic map of the Crestwood quadrangle, north-central Kentucky
Roy Clark Kepferle
1976, Geologic Quadrangle 1342
Geologic history of the Slick Rock District and vicinity, San Miguel and Dolores counties, Colorado
Daniel R. Shawe
1976, Professional Paper 576-E
Chemical analysis and statistical data for water samples collected in Colorado, New Mexico, and Arizona as part of a study of surface-water and stream-sediment sampling techniques used in uranium exploration
Sylvia S. Burnside, Karen J. Wenrich-Verbeek
1976, Open-File Report 76-851
Geologic and tectonic maps of the Bearpaw Mountains area, north-central Montana
B. C. Hearn Jr.
1976, IMAP 919
Geologic map of the Continental Divide quadrangle, McKinley County, New Mexico
Morris W. Green
1976, Geologic Quadrangle 1338
Geologic map of the Claysville quadrangle, northeastern Kentucky
Stanley J. Luft
1976, Geologic Quadrangle 1341
Sedimentary rock alteration in the Slick Rock District, San Miguel and Dolores counties, Colorado
Daniel R. Shawe
1976, Professional Paper 576-D
Schlumberger electric soundings in and near Gettysburg Basin, Pennsylvania
David L. Campbell
1976, Open-File Report 76-773
Effect of irrigation pumping on desert pupfish habitats in the Ash Meadows, Nye County, Nevada
William W. Dudley Jr., J. D. Larson
1976, Professional Paper 927
The Ash Meadows area, at the southern tip of the Amargosa Desert in southern Nevada, discharges ground water collected over several thousand square miles of a regional flow system developed in Paleozoic carbonate rocks. Water moves westward across fault contacts from the bedrock into poorly interconnected gravel, sand, and terrestrial-limestone...
Map showing total intensity geomagnetic field of the Caribbean region
J.E. Matthews
1976, Miscellaneous Field Studies Map 742
No abstract available....
Accuracy of evapotranspiration rates determined by the water-budget method, Gila River flood plain, southeastern Arizona
R.L. Hanson, D.R. Dawdy
1976, Professional Paper 655-L
Mineral resources of the South Warner Wilderness, Modoc County, California
Wendell A. Duffield, Robert D. Weldin, W. E. Davis
1976, Bulletin 1385-D
No abstract available....
Atlas of urban and regional change, San Francisco Bay region; land-use change, 1970-1972
USGS Land Information and Analysis Office Geography Program
1976, Open-File Report 76-396
No abstract available....
Shaded relief map of the Aeolis Quadrangle of Mars
Water Resources Division, U.S. Geological Survey
1976, IMAP 1000
Aeroradioactivity map of an area south of Boston, Massachusetts
Water Resources Division, U.S. Geological Survey
1976, Open-File Report 76-516
Map showing foundation conditions in the Fairbanks D-2 SW Quadrangle, Alaska
T. L. Pewe, J. W. Bell
1976, IMAP 829-E
A study of the effects of stream channelization and bank stabilization on warm water sport fish in Iowa: subproject no. 3. Organisms in central Iowa warm water streams
Laurence Robert King, Kenneth D. Carlander
1976, FWS/OBS 76/13
