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Slope-stability analysis and creep susceptibility of Quaternary sediments on the northeastern United States continental slope Slope-stability analysis and creep susceptibility of Quaternary sediments on the northeastern United States continental slope

The continental slope off the northeastern United States is a relatively steep, morphologically complex surface which shows abundant evidence of submarine slides and related processes. Because this area may be developed by the petroleum industry, questions arise concerning the potential for further slope failures or unacceptable deformations and the conditions necessary to cause such...
Authors
James S. Booth, Armand J. Silva, Stephen A. Jordan
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

SOME APPLICATIONS OF SEISMIC SOURCE MECHANISM STUDIES TO ASSESSING UNDERGROUND HAZARD. SOME APPLICATIONS OF SEISMIC SOURCE MECHANISM STUDIES TO ASSESSING UNDERGROUND HAZARD.

Various measures of the seismic source mechanism of mine tremors, such as magnitude, moment, stress drop, apparent stress, and seismic efficiency, can be related directly to several aspects of the problem of determining the underground hazard arising from strong ground motion of large seismic events. First, the relation between the sum of seismic moments of tremors and the volume of...
Authors
Art McGarr

SPATIAL AND SPECTRAL RESOLUTION IN GEOBOTANY. SPATIAL AND SPECTRAL RESOLUTION IN GEOBOTANY.

Remotely sensed data are now available from a wide variety of instruments, each data set having a particular spectral and spatial resolution. The changes in vegetation associated with changes in lithology or the presence of mineral deposits can also occur at different scales. The task of geobotanical remote sensing is to choose or adapt the remotely sensed data to the appropriate...
Authors
Nancy M. Milton, D.A. Mouat

SPECTRAL REFLECTANCE OF THE CARBONATITE COMPLEXES AT MOUNTAIN PASS, CALIFORNIA AND IRON HILL, COLORADO. SPECTRAL REFLECTANCE OF THE CARBONATITE COMPLEXES AT MOUNTAIN PASS, CALIFORNIA AND IRON HILL, COLORADO.

This paper describes the distinctive spectral reflectance of these two carbonatites and their related rocks, and also discusses the possible use of spectral reflectance measurements for exploring carbonatites. Laboratory spectra recorded in the 0. 4-2. 5 micrometer wavelength range showed absorption features discussed in the abstract. High spectral-resolution airborne radiance...
Authors
Lawrence C. Rowan, Williams Collins, Marguerite J. Kingston, James K. Crowley

Status and future of satellite image mapping: Based on experience of the U.S. Geological Survey Status and future of satellite image mapping: Based on experience of the U.S. Geological Survey

Space systems now provide data in basically orthographic form which greatly simplifies the production of the image map. Moreover, the multispectral capability of space systems facilitates the use of the color mode when compared to aerial photography. Digital graphical information systems are now being developed on a global basis and the response from space which represents the image in
Authors
Alden P. Colvocoresses

STRUCTURAL AND HYDROGEOLOGIC APPLICATIONS OF REMOTE SENSING DATA, EASTERN YUCATAN PENINSULA, MEXICO. STRUCTURAL AND HYDROGEOLOGIC APPLICATIONS OF REMOTE SENSING DATA, EASTERN YUCATAN PENINSULA, MEXICO.

Landsat and Seasat satellite images and aerial photographs of eastern Yucatan Peninsula, Mexico, were analyzed to delineate geologic controls of ground water. Significant interpretation results include the delineation of linear topographic swales, interpreted as fractures, extending more than 50 km along strike from the previously known limit of the Holbox fracture system; the alignment...
Authors
C. Scott Southworth
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