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Field guide to sedimentary structures in the Navajo and Entrada sandstones in southern Utah and northern Arizona Field guide to sedimentary structures in the Navajo and Entrada sandstones in southern Utah and northern Arizona

This field-trip guide describes the common sedimentary structures that occur in eolian sands. The outcrops that are described occur in the Navajo and Entrada Sandstones between the areas of Page, Arizona and St. George, Utah (figure I), but the sedimentary structures of these two sandstones are typical of most eolian deposits. The main part of the guide discusses the geologic setting and...
Authors
David M. Rubin, Ralph E. Hunter

Gulf trough: The Atlantic connection Gulf trough: The Atlantic connection

Analyses of seismic reflection profiles and stratigraphic data indicate a continuation of the Gulf trough trend across eastern South Carolina and offshore between Cape Fear and Cape Hatteras, North Carolina. Seismic profiles show a linear northeast-trending zone of nondeposition and erosion and areas of chaotic deposition in the Eocene and Oligocene sections. The character of deposition...
Authors
Peter Popenoe, Vernon J. Henry, Faisal M. Idris

On the interpretation of the geomagnetic energy spectrum On the interpretation of the geomagnetic energy spectrum

Two recent high-degree magnetic energy spectra, based mostly on MAGSAT data, are compared and found to agree very well out to order and degree n = 15, but the spectrum remains somewhat uncertain for higher degrees. The hypothesis that a primary break in the slope of the spectrum, plotted semi-logarithmically, is due to a transition from dominance by core sources to dominance by crustal
Authors
E.R. Benton, L.R. Alldredge
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