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Geological Society of America Bulletin, Volúmenes11-20
Geological Society of America
Vista completa - 1910
abundant American Appalachian basin Bighorn Bull calcareous character conglomerate correlation County December delta deposits diabase dikes discussion dolomite drift east Edgewood Eocene erosion Eurypterids Eurypterus evidence fault fauna feet thick formation fossils Frank Leverett gases Geol geologist glacial glaciers gravel gray hornblende ice-sheet igneous igneous rocks Illinois Iowa Jour Juniata Lake lava layers limestone lower marine mass Medina miles minerals Missouri moraines mountain Museum nepheline syenite Niagara observed occur Ontario oolite Ordovician Ordovicic origin outcrops Paleozoic paper pebbles peneplain plain Pleistocene Presented in abstract probably Pterygotus quartz quartzite region relations represented ridges River rocks sand sandstone scarp Science sediments Sexton Creek shale shown Silurian Siluric slate Society species specimens strata streams structure surface Tarr terraces tion Trenton U. S. Geological Survey unconformity University uplift upper Valley volcanic Washington Wenlock Wisconsin York
Página 22 - Soil Erosion," published as a bulletin of the Bureau of Soils in the United States Department of Agriculture, is a complete and graphic refutation — if such were really needed — of this contention.
Página 165 - ... non-eroding amounts. EXTENSION AREA. A test range in excess of that provided by the main White Sands Missile Range (WSMR) required for an indefinite period of time to support future military programs. EXTRUSIVE ROCK. Rocks derived from magma poured out or ejected at the earth's surface . FAULT. A fracture in the earth's crust accompanied by a displacement of one side with respect to the other. FAULT BLOCK. A...
Página 173 - The dip-shift (Fig. 90) is the component of the shift parallel with the fault dip. The bending of the strata near the fault may be so great that the direction of the shift is no longer even nearly parallel with the fault surface; it is better, then, to use the three following components of the shift: The strike-shift denotes the horizontal component of the shift parallel with the fault strike, as already defined. The normal shift denotes the horizontal component of the shift at right angles to the...
Página 361 - Cyrene member, which will include the lower, fossiliferous limestone phase of the formation, below the Bowling Green member, exposed one to two miles east of Cyrene and Edgewood in Pike County, Missouri, and about two miles north of Thebes in Alexander County, Illinois; (2) The Noix oolite member which will refer to the local oolite facies of the formation, which is the equivalent of a variable portion of the upper part of the Cyrene member; and (3) the Bowling Green member, which will embrace the...
Página 16 - I have in many places departed from the severe ascetic style which has become conventional in scientific monographs. Perhaps no apology is called for. Under ordinary circumstances the ascetic discipline is necessary. Give the imagination an inch and it is apt to take an ell, and the fundamental requirement of the scientific method -- accuracy of statement -- is imperiled.
Página 593 - ... condensed water) yielded no more than 0.4 grams of chlorine. If this be calculated in the form of gas, it will correspond at most to 0.02%, assuming that approximately 1000 liters of gas, were drawn into the tubes. Fluorine seems to be present in about twice this quantity, but in no sense can...
Página 176 - Luess, in which the strike is transverse to the strike of the rocks, the dip high and varying from one side to the other in the course of the fault, and the relative movement practically horizontal and parallel...
Página 172 - shift" is used to denote the relative displacements of the rock masses situated outside the zone of dislocation; the qualifying 4. — The Shift words relate to the strike and dip of the fault with one exception, in which the meaning is clear. The shift, or net shift...
Página 58 - To change is always seeming fickleness. But not to change with the advance of science, is worse ; it is persistence in error ; and, therefore, notwithstanding the former adoption of what has been called the Natural History System, and the pledge to its support given by the author in supplying it with a Latin nomenclature, the whole system, its classes, orders, genera, and Latin names, have been rejected ; and even the trace...