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The metalliferous deposits of Chile tend to be restricted to well denned metallogenetic provinces, each characterized by a dominant mineral or mineral assemblage. The most important ore deposits are those of copper, iron, silver, gold, and manganese. The primary minerals are few in number and most are simple sulfides and...

<This basic-data report is limited to the presentation of selected drillers' logs and their geologic correlations, well data, and chemical analyses of water from wells in Burlington County, N. J. The county lies within the Coastal Plain province; it is underlain by unconsolidated sediments of Quarternary, Tertiary, and Cretaceous...

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One of the limitations under which any library operates is the image it creates as a storehouse, This aspect can obscure the purposes and activities which make one library differ from another. In an institutional library, like the Survey's, the library purposes are related to the changing life of the...

Twelve generalized structural contour maps were prepared from a study of 169 well logs or sample logs of drill cuttings from the Coastal Plain of New Jersey, Delaware, and the E astern Shore of Maryland. The configuration of the tops of the nonmarine Cretaceous deposits (Patuxent , Patapsco, Raritan, and Magothy formations) and...

The data in the following tables were abstracted from measurements of physical properties of evaporite minerals or of equivalent synthetic compounds. The compounds considered are the halide and sulfate salts which supposedly precipitated from evaporating ocean water and which form very extensive and thick "rock salt" beds. These beds are...

Uranium-vanadium deposits in the Salt Wash Member of the Morrison Formation in Montezuma Canyon, San Juan County, Utah, exhibit zoning that is interpreted as a result of metal transport by diffusion. The concentric zones consist of a brown nonmineralized core, an olive-gray mineralized shell, and a gray nonmineralized outer zone. The...

The Hopi Buttes diatremes erupted in a shallow lake that was filled in as volcanic activity progressed in Pliocene time. At the end of the period of volcanism the landscape included low lava domes capping some of the diatremes, a few flows, and numerous craters of the maar type, surrounded...

Geological and experimental evidence indicate that the three-phase field, plagioclase-alkalifeldspar-liquid, may terminate in several different ways. The possible terminations have been developed from Schreinemakers' rules governing the disappearance of three-phase fields. In igncous rocks, these different terminations may arise from variations in the relative amounts of additional components in magmas, or from...

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Sulphur has been identified as one of the elements present in the contamination spot which forms under the electron beam in the microprobe. The presence of the sulphur results in a rapid change in intensity measurements causing a loss of observed intensity for elements other than sulphur. The source of...

The potassium and sodium content of chemically analysed Cenozoic igneous rocks from about 150 areas of the western United States has been examined. For each area a plot of the molecular proportion K2O(K2O + Na2O)">K2O(K2O + Na2O) [Niggli's k-value] is shown, and the projected k-value determined at 50...

The solubility of quartz in water was investigated by three sets of experiments at 1000 atm PH2O and temperatures ranging from 45° to 300°C at water pressures appropriate for the coexistence of three phases, gaseous water, liquid, and quartz, at temperatures ranging from 69° to 240°C a long term study of the...

Study of its origin and composition suggests why these shales are not source beds for petroleum....

Minerals that show mixed layering, particularly with the component layers in random sequence, pose problems because they may behave thermodynamically as single phases or as polyphase aggregates. Two operational criteria are proposed for their distinction. The first scheme requires two samples of mixed-layer material which differ only in the proportions...

NORDSTRANDITE (Al2O3·3H2O), previously reported only as a synthetic product1,2, occurs in Miocene limestone on Guam. In south Guam this limestone forms a cap several hundred feet thick, on the Mount Alifan–Mount Lamlan ridge, and overlies late Eocene and early Miocene basalt flows and volcanic conglomerates. The volcanic rocks below the...

The effect of 1 atm of CO2 over initially neutral solutions supersaturated with silica, at room temperature, as contrasted with 1 atm of air was determined over a period of 5 months, together with changes brought about by the introduction of calcite and dolomite to these solutions in the form of...

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The recent measurements of the elastic constants of calcite by Reddy and Subrahmanyam (1960) disagree with the values obtained independently by Voigt (1910) and Bhimasenachar (1945). The present authors, using an ultrasonic pulse technique at 3 Mc and 25°C, determined the elastic constants of calcite using the exact equations governing the wave velocities in the single crystal. The results are C11=13.7, C33=8.11, C44=3.50, C12=4.82, C13=5.68, and C14=−2.00,...

Those of us who seek to explain the variations in hydrologic phenomena such as may be observed in the occurrence of floods or in changes in the shape of river channels are painfully aware of the lack of adequate data. Our existing data, collected mainly to serve immediate practical needs...

The fate of toxaphene, applied in three treatments at a total calculated concentration of 0.05 p.p.m. to Clayton Lake, New Mexico, was followed over a 1.5-year period. A detailed description of the chromatographic method of analysis is given. Water concentrations of toxaphene were higher in leeshore samples than in windward...

No abstract available....