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Publication Extents

Not all publications have extents, not all extents are completely accurate
Sedimentary facies of iron-formation
H. L. James
1954, Economic Geology (49) 235-293
The sedimentary iron-formations of Precambrian age in the Lake Superior region can be divided on the basis of the dominant original iron mineral into four principal facies: sulfide, carbonate, oxide, and silicate. As chemical sediments, these rocks reflect certain aspects of the chemistry of the depositional environments. The major control, at least for the sulfide,...
Ground-water field trip, Tucson to Nogales, Arizona
D.R. Coates, L.C. Halpenny
1954, Open-File Report 54-52
A field excursion following the route described herein was conducted as a part of the curriculum of the 6th Ground Water Short Course, which was held by the Geological Survey at the University of Arizona in April 1954. The route log and descriptive text were designed to provide a general...
Symposium on land erosion: Introduction
H.V. Peterson
1954, Eos, Transactions, American Geophysical Union (35) 243-244
One of the very obvious geologic phenomena that is continuously in operation throughout the Earth's land surface is erosion, the process of wearing away the soil or the surface mantle. The falling of rain drops on an unprotected slope, the flow of water across land or in a channel, the borings of a rodent, the...
A new sphenopsid cone from Iowa
S.H. Mamay
1954, Annals of Botany (18) 229-239
A new Pennsylvanian cone genus (Litostrobus iowensis, n. gen., n. sp.), apparently of sphenophyllalean affinity, is described on the basis of a coal-ball specimen from the Urbandale Mine, Urbandale, Iowa. The cone is small and extremely simple in organization. It consists of superposed whorls of twelve bracts each. The bases of the bracts are fused to form shallow cuplike...
Marsh and aquatic weed problems in wildlife habitat
A. C. Martin
1954, Weeds (3) 139-142
To most people, the word weeds signifies pest plants of the farm, roadside, or other upland areas. However, weeds also occur on, under, or near water. Fifteen million dollars have been spent on a single aquatic nuisance in the South—the prolific water-hyacinth which clogs navigable streams and lakes with its growth....