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Topography, structure, and mare ridges in southern Mare Imbrium and northern Oceanus Procellarum Topography, structure, and mare ridges in southern Mare Imbrium and northern Oceanus Procellarum
The gross topography in southern Mare Imbrium and northern Oceanus Procellarum correlates with the buried structure and deposits of the Imbrium Basin and its rim, and many of the mare slopes may be depositional and reflect the pre-existing major features of the basin. Post-depositional, local distortion of the mare surface, however, is present and in many places associated with mare...
Authors
Baerbel K. Lucchitta
Crater clusters and light mantle at the Apollo 17 site: A result of secondary impact from Tycho Crater clusters and light mantle at the Apollo 17 site: A result of secondary impact from Tycho
The morphologies of Tycho secondary craters and their ejecta deposits were studied using full-Moon, Lunar-Orbiter, and Apollo panoramic photographs. These data were compared with similar data for the secondary craters and light mantle of the Apollo 17 landing site. The results indicate that (1) the central crater cluster and the light mantle can be attributed to Tycho, (2) the dominant...
Authors
Baerbel K. Lucchitta
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: July 1977 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: July 1977
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory; therefore it should be regarded as preliminary.
Authors
J.B. Townshend, J.E. Papp, M.J. Moorman, C.E. Deadmon, S.P. Tilton
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1977 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1977
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory; therefore it should be regarded as preliminary.
Authors
J.B. Townshend, J.E. Papp, M.J. Moorman, C.E. Deadmon, S.P. Tilton
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: February 1977 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: February 1977
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory; therefore it should be regarded as preliminary.
Authors
J.B. Townshend, J.E. Papp, M.J. Moorman, C.E. Deadmon, S.P. Tilton
Earthquake-hazard map of the United States Earthquake-hazard map of the United States
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Authors
Sylvester Theodore Algermissen, David M. Perkins
A FORTRAN program for calculating nonlinear seismic ground response A FORTRAN program for calculating nonlinear seismic ground response
The program described here was designed for calculating the nonlinear seismic response of a system of horizontal soil layers underlain by a semi-infinite elastic medium representing bedrock. Excitation is a vertically incident shear wave in the underlying medium. The nonlinear hysteretic behavior of the soil is represented by a model consisting of simple linear springs and Coulomb...
Authors
William B. Joyner
Large landslides, composed of megabreccia, interbedded in Miocene basin deposits, southeastern Arizona Large landslides, composed of megabreccia, interbedded in Miocene basin deposits, southeastern Arizona
The landslides in the Kearny and El Capitan Mountain quadrangles, Pinal and Gila Counties, Ariz., are tabular or lens like masses of megabreccia enclosed in Miocene basin deposits. The megabreccias within individual slide blocks are composed of pervasively brecciated Precambrian and younger formations that remain in normal stratigraphic sequence, indicating that each landslide moved as a...
Authors
Medora Louise Hooper Krieger