Magnetic particles extracted from manganese nodules: Suggested origin from stony and iron meteorites
R. B. Finkelman
1970, Science (167) 982-984
On the basis of x-ray diffraction and electron microprobe data, spherical and ellipsoidal particles extracted from manganese nodules were divided into three groups. Group I particles are believed to be derived from iron meteorites, and Group II particles from stony meteorites. Group III particles are believed to be volcanic in...
Operators manual for proportional frequency controller
J. V. Skinner, J.P. Beverage
1970, Report
No abstract available....
Distribution of the Toquima-Table Head (Middle Ordovician Whiterock) Faunal Realm in the Northern Hemisphere
Reuben James Ross Jr., J. Keith Ingham
1970, Bulletin of the Geological Society of America (81) 393-408
Discovery of a Whiterock trilobite assemblage in the Albany Mudstone, Girvan District, southwestern Scotland, led to an assessment of the distribution of Middle Ordovician brachiopod and trilobite faunas previously assigned to the White-rock Stage of Cooper (1956).These faunas lie within a belt designated as the Toquima-Table Head Faunal Realm. This...
Environmental conditions and resources of southwestern Mississippi
U.S. Geological Survey
1970, Report
The impending phase-out of Saturn V testing by the National Aeronautics and Space Administration at the Mississippi Test Facility (MTF) necessitates consideration of possible alternative uses for the Facility and surrounding region. To make a rapid and up-to-date study of pertinent environmental factors in that region, remote sensing techniques and...
Origin of the disturbed belt in northwestern Montana
Melville R. Mudge
1970, Article
The northern part of the disturbed belt in Montana is a northwesterly trending zone of closely spaced westerly dipping thrust faults, many folds, and some longitudinal normal faults and transverse faults. The theory of vertical uplift that results in gravitational gliding is a reasonable explanation of the origin of the...
Wildlife imported into the United States in 1969
U.S. Bureau of Sport Fisheries and Wildlife
1970, Wildlife Leaflet 491
No abstract available....
Physical characteristics of the lunar regolith determined from surveyor television observations
Eugene Merle Shoemaker, E. C. Morris
1970, Radio Science (5) 129-155
The new data on the physical characteristics of the lunar surface derived from the Surveyor pictures can be fitted to a simple ballistic model for the origin and development of the lunar regolith. At a given locality, the size-frequency distributions of craters on the lunar surface can...
Effects of local geology on ground motion near San Francisco Bay
Roger D. Borcherdt
1970, Bulletin of the Seismological Society of America (60) 29-61
Measurements of ground motion generated by nuclear explosions in Nevada were made for 37 locations near San Francisco Bay, California. The results were compared with the San Francisco 1906 earthquake intensities and the strong-motion recordings of the San Francisco earthquake of March 22, 1957. The recordings show marked amplitude variations...
Variations of major chemical constituents across the central Sierra Nevada batholith
P. C. Bateman, F. C. W. Dodge
1970, Bulletin of the Geological Society of America (81) 409-420
A study of 193 chemical analyses of plutonic rocks from 132 localities in the central Sierra Nevada shows convincingly that K2O decreases systematically westward and suggests that Fe2O3 and TiO2 may also decrease westward and that FeO, MgO, and CaO may increase. The ratio K2O/SiO2 obviously decreases westward across six of eight provisionally...
Petrogenesis of mylonites of high metamorphic grade in the Peninsular Ranges of southern California
Ted G. Theodore
1970, Bulletin of the Geological Society of America (81) 435-449
A fairly continuous, narrow belt of mylonite gneisses extends approximately 60 miles across southern California and crops out prominently at Coyote Mountain, near Borrego Springs, San Diego County. At Coyote Mountain, both prebatholithic rocks and igneous rocks lithologically similar to rocks from the nearby southern...
Sedimentary volumes and their significance
James Gilluly, John C. Reed Jr., Wallace M. Cady
1970, Bulletin of the Geological Society of America (81) 353-375
Sedimentary volumes are of prime interest in many fields of geology: as measures of erosional rates, of geochemical balance, and recently, with the virtual demonstration of continental drift, as measures of movement of the continental and oceanic plates.The Basement Map of the United States, published by the U.S. Geological Survey...
Nuclear methods applied to uranium geochemistry
J. N. Rosholt
1970, IEEE Transactions on Nuclear Science (17) 173-176
Stable and radioactive daughter products produced from nuclear disintegrations of uranium have proved useful in fundamental studies of the geochemistry of uranium in igneous rock and sedimentary environments and in ore deposits. Information gained from geochemical studies of uranium migration has been used to develop models...
Lunar clinopyroxenes: Chemical composition, structural state, and texture
M. Ross, A.E. Bence, E.J. Dwornik, J. R. Clark, J. J. Papike
1970, Science (167) 628-630
Single-crystal x-ray diffraction, microprobe, optical and electron optical examinations of clinopyroxenes from Apollo 11 lunar samples 10003, 10047, 10050, and 10084 show that generally the crystals are composed of (001) augite-pigeonite intergrowths in varying ratios. Transmission electron micrographs reveal abundant exsolution lamellae, many only 60 Å thick....
Petrology of unshocked crystalline rocks and shock effects in lunar rocks and minerals
E. C. T. Chao, O.B. James, J.A. Minkin, J.A. Boreman, E.D. Jackson, C.B. Raleigh
1970, Science (167) 644-647
On the basis of rock modes, textures, and mineralogy, unshocked crystalline rocks are classified into a dominant ilmenite-rich suite (subdivided into intersertal, ophitic, and hornfels types) and a subordinate feldspar-rich suite (subdivided into poikilitic and granular types). Weakly to moderately shocked rocks show high strain-rate deformation and solid-state transformation of...
Quantitative chemical analysis of lunar samples
L. C. Peck, V. C. Smith
1970, Science (167) 532-532
In three lunar samples the high titanium contents previously reported were confirmed. Water and ferric oxide were absent....
Crystallography of some lunar plagioclases
D. B. Stewart, D.E. Appleman, J.S. Huebner, J. R. Clark
1970, Science (167) 634-635
Crystals of calcic bytownite from type B rocks have space group I1 with c ≈ 14 angstroms. Bytownite crystals from type A rocks...
Thermoluminescence of lunar samples
G. B. Dalrymple, Richard R. Doell
1970, Science (167) 713-715
Appreciable natural thermoluminescence with glow curve peaks at about 350 degrees centigrade for lunar fines and breccias and above 400 degrees centigrade for crystalline rocks has been recognized in lunar samples. Plagioclase has been identified as the principal carrier of thermoluminescence, and the difference in peak temperatures indicates compositional or...
Water, hydrogen, deuterium, carbon, carbon-13, and oxygen-18 content of selected lunar material
I. Friedman, J. R. O’Neil, L.H. Adami, J.D. Gleason, K. Hardcastle
1970, Science (167) 538-540
The water content of the breccia is 150 to 455 ppm, with a δD from—580 to —870 per mil. Hydrogen gas content is...
Lunar troilite: Crystallography
H. T. Evans Jr.
1970, Science (167) 621-623
Fine, euhedral crystals of troilite from lunar sample 10050 show a hexagonal habit consistent with the high-temperature NiAs-type structure. Complete three-dimensional counter intensity data have been measured and used to confirm and refine Bertaut's proposed low-temperature crystal structure....
Specific heats of lunar surface materials from 90 to 350 degrees Kelvin
R. A. Robie, B. S. Hemingway, W.H. Wilson
1970, Science (167) 749-750
The specific heats of lunar samples 10057 and 10084 returned by the Apollo 11 mission have been measured between 90 and 350 degrees Kelvin by use of an adiabatic calorimeter. The samples are representative of type A vesicular basalt-like rocks and of finely divided lunar soil. The...
Magnetic studies of lunar samples
Richard R. Doell, C. Sherman Gromme, A. N. Thorpe, F. E. Senftle
1970, Science (167) 695-697
The remanent magnetism of a lunar type C breccia sample includes a large viscous component with a time constant of several hours, and a high coercivity remanence, possibly acquired by impact processes on the lunar surface. Ilmenite(?) and metallic iron in breccias, and ferrous and metallic iron in glass beads...
Lunar regolith at Tranquillity Base
E.M. Shoemaker, M. H. Hait, G.A. Swann, D. L. Schleicher, D.H. Dahlem, G. G. Schaber, R. L. Sutton
1970, Science (167) 452-455
The regolith at Tranquillity Base is a layer of fragmental debris that ranges in thickness from about 3 to 6 meters. The thickness of the regolith and the exposure histories of its constituent fragments can be related, by means of a relatively simple model, to the observed crater distribution....
Lunar rock compositions and some interpretations
A.E.J. Engel, C.G. Engel
1970, Science (167) 527-528
Samples of igneous "gabbro," "basalt," and lunar regolith have compositions fundamentally different from all meteorites and terrestrial basalts. The lunar rocks are anhydrous and without ferric iron. Amounts of titanium as high as 7 weight percent suggest either extreme fractionation of lunar rocks or an unexpected solar abundance of titanium....
Lunar soil: Size distribution and mineralogical constituents
M.B. Duke, C.C. Woo, M. L. Bird, G.A. Sellers, R. B. Finkelman
1970, Science (167) 648-650
The lunar soil collected by Apollo 11 consists primarily of submillimeter material and is finer in grain size than soil previously recorded photographically by Surveyor experiments. The main constituents are fine-grained to glassy rocks of basaltic affinity and coherent breccia of undetermined origin. Dark glass, containing abundant nickel-iron spheres, coats...
Emission spectrographic determination of trace elements in lunar samples
C. Annell, A. Helz
1970, Science (167) 521-523
Eighteen minor or trace elements were detected and determined by emission spectroscopy. Direct d-c arc excitation of powdered samples was used with three variations in the procedure. Thirteen lunar samples consisting of four fine-grained igneous rocks, one medium-grained igneous rock, seven breccias, and one sample of fines were analyzed. The...
