A Pliocene flora and insect fauna from the Bering Strait region
D.M. Hopkins, J.V. Matthews, J. A. Wolfe, M.L. Silberman
1971, Palaeogeography, Palaeoclimatology, Palaeoecology (9) 211-231
A flood-plain forest has been preserved beneath a lava flow that invaded the Inmachuk River Valley in the northern part of the Seward Peninsula, Alaska, during the Pliocene Epoch. The fossil flora is of great biogeographic interest because of its position (Fig. 1)...
Paleomagnetism of San Cristobal Island, Galapagos
A. Cox
1971, Earth and Planetary Science Letters (11) 152-160
Isla San Cristobal, the most easterly of the Galapagos Islands, consists of two parts: a large volcano constitutes the southwest half of the island and an irregular apron of small cones and flows makes up the northeast half. As some of the...
Determination of silver in soils, sediments, and rocks by organic-chelate extraction and atomic absorption spectrophotometry
T. T. Chao, J.W. Ball, H. M. Nakagawa
1971, Analytica Chimica Acta (54) 77-81
A useful method for the determination of silver in soil, sediment, and rock samples in geochemical exploration has been developed. The sample is digested with concentrated nitric acid, and the silver extracted with triisooctyl thiophosphate (TOTP) in methyl isobutyl ketone (MIBK) after dilution of the...
Reactivity of clay minerals with acids and alkalies
Dorothy Carroll, Harry C. Starkey
1971, Clays and Clay Minerals (19) 321-333
One-g samples of a montmorillonite, a metabentonite, an illite, two kaolinites, and three halloysites were treated with 50 ml of hydrochloric acid (6⋅45 N, 1:1), acetic acid (4⋅5 N, 1:3), sodium hydroxide (2⋅8 N), sodium chloride solution (pH 6⋅10; Na = 35‰; Cl = 21⋅5‰), and natural sea water (pH...
Brucite identified as crystallizing from a natural cold alkaline spring gel
Robert W. Luce
1971, Clays and Clay Minerals (19) 335-336
This note presents evidence for the natural low temperature crystallization of brucite, and also indicates the possibility of ambient temperature serpentinization....
Mixed-layer kaolinite-montmorillonite from the Yucatan Peninsula, Mexico
L.G. Schultz, A.O. Shepard, P.D. Blackmon, H.C. Starkey
1971, Clays and Clay Minerals (19) 137-150
Clay beds 1–2 m thick and interbedded with marine limestones probably of early Eocene age are composed of nearly pure mixed-layer kaolinite-montmorillonite. Particle size studies, electron micrographs, X-ray diffraction studies, chemical analyses, cation exchange experiments, DTA, and TGA indicate that clays from three different localities contain roughly equal proportions of...
An annotated bibliography of fauna and flora described from the Dockum Group of Triassic age in eastern New Mexico and West Texas
James C. Wright, Warren I. Finch
1971, Open-File Report 71-333
This annotated bibliography was prepared by Warren I. Finch from a rough copy compiled by the late James C. Wright in either late 1967 or early 1968 as an aid to his understanding of the stratigraphic distribution of uranium deposits in Triassic rocks of the Southern high Plains. He did...
Magnetic susceptibilities of crystalline rock samples, Yukon River-Porcupine River area, east-central Alaska
William Peters Brosge, Arthur Conradi
1971, Open-File Report 71-55
No abstract available....
Soft-egg disease of fishes
K. Wolf
1971, Fish Disease Leaflet 34
No abstract available at this time...
Quantitative comparison of RTG-2 cell growth a 5 - 25 C
J.A. Plumb, K. Wolf
1971, In Vitro (7) 42-45
Mississippian stratigraphy of the Diamond Peak area, Eureka County, Nevada, with a section on the biostratigraphy and age of the Carboniferous formations
David A. Brew, Mackenzie Gordon Jr.
1971, Professional Paper 661
No abstract available....
The earth's core: Speculations on its chemical equilibrium with the mantle
R. Brett
1971, Geochimica et Cosmochimica Acta (35) 203-221
A review of the literature indicates that a reasonable estimate of the composition of the earth's core is iron with Ni0–5, Si10–25 (wt.%). Thermodynamic calculations and comparison of chondritic with terrestrial abundances indicate that 1 wt.% each of Mn, P, and Cr might also be present. A core of this composition...
Continuous extraction of organic materials from water
M. C. Goldberg, L. DeLong, L. Kahn
1971, Environmental Science & Technology (5) 161-162
No abstract available....
Comparison of Sr87 Sr86 for sea-water strontium and the Eimer and Amend SrCO3
R.A. Hildreth, W.T. Henderson
1971, Geochimica et Cosmochimica Acta (35) 235-238
A series of analyses were undertaken to determine a precise difference between sea-water strontium and the Eimer and Amend SrCO3 standard. A mean difference between the sea-water composite and the Eimer and Amend SrCO3 of 0.00107 ± 0.000042 was obtained....
Glacial marine sediments in the precambrian Gowganda formation at Whitefish Falls, Ontario (Canada)
D. A. Lindsey
1971, Palaeogeography, Palaeoclimatology, Palaeoecology (9) 7-25
Study of a well-exposed section of the Gowganda Formation at Whitefish Falls, Ontario, suggests criteria for the recognition of glacial marine sediments. Thickness of hundreds of feet, lateral continuity, faint internal stratification, sorted lenses of sandstone and conglomerate, and dropstones characterize much of the tillite. Thickness of hundreds of feet,...
Alewife dieoffs: Why do they occur?
Peter J. Colby
1971, Limnos (4) 18-27
Periodid midwinter, early spring, and summer mortalities of alewives (Alosa pseudoharengus) have been common in the Great Lakes since the first appearance of the silvery marine invader in Lake Ontario in the mid-1870's. In 1967 a nationally publicized dieoff of tremendous magnitude (estimated at several hundred million pounds of...
Earthquakes: May-June 1971
Carl A. Posey, editor(s)
1971, Earthquake Information Bulletin (USGS) (3) 26-27
No abstract available....
Duck mortality caused by wind
H.A. Kantrud
1971, Prairie Naturalist (3) 32-32
Abstract has not been submitted...
Albinism in lampreys in the upper Great Lakes
Robert A. Braem, Everett L. King
1971, Copeia (1971) 176-179
Albinism in fishes is relatively rare except in some stocks of hatchery-reared salmonids. In the Petromyzonidae, only four albino lampreys have been reported....
Selenography and selenodesy with Apollo whole-disk lunar photographs I. Selenography
D.W.G. Arthur
1971, Icarus (14) 388-418
The Apollo whole-disk lunar photographs, with spacecraft lunar nadirs about 70° from the center of mean face, have considerable selenodetic potential provided that the requirements of resolution and precision can be met. Uncertainties in the internal camera geometry degrade the precision and make...
Petrology of the Triassic Moenkopi Formation and related strata in the Colorado Plateau region, with a section on stratigraphy
Robert Allen Cadigan, John Harris Stewart
1971, Professional Paper 692
No abstract available....
Results from the apollo-12 passive seismic experiment
G. Latham
1971, Earthquake Information Bulletin (USGS) (3) 4-9
The objective of the passive seismic experiment is to measure vibrations of the lunar surface produced by all natural and artificial sources of seismic energy and to use these data to deduce the internal structure and composition of the moon, the nature of forces which may cause deformation of the...
Review of: Fish, amphibian and reptile remains from archaeological sites, Part 1: Southeastern and southwestern United States
C. L. Douglas
Stanley J. Olsen, editor(s)
1971, Report
No abstract available at this time...
Determination of iodine in the p.p.m. range in rocks
F. S. Grimaldi, M. M. Schnepfe
1971, Analytica Chimica Acta (53) 181-184
No abstract available....
Hydrogeochemical effects of injecting wastes into a limestone aquifer near Pensacola, Florida
Donald A. Goolsby
1971, Groundwater (9) 13-19
Acidic industrial wastes have been injected into deep wells in a limestone aquifer near Pensacola, Florida, since 1963. Prior geohydrologic studies in the area had indicated that the limestone aquifer contained nonpotable water and was overlain by an extensive clay confining layer.Two injection wells are presently being used to inject...
