Publications
Filter Total Items: 7238
Coastal processes and morphology of the Bering Sea coast of Alaska
No abstract available.
Authors
A. H. Sallenger, R. Hunter, J. R. Dingler
Topographic control and accumulation rate of some Holocene coral reefs: south Florida and Dry Tortugas
Core drilling and examination of underwater excavation on 6 reef sites in south Florida and Dry Tortugas revealed that underlying topography is the major factor controlling reef morphology. Carbon-14 dating on coral recovered from cores enables calculation of accumulation rates. Accumulation rates were found to range from 0.38 m/1000 years in thin Holocene reefs to as much as 4.85 m/1000 years in
Authors
E.A. Shinn, J.H. Hudson, R. B. Halley, B. H. Lidz
Limestone compaction: an enigma
Compression of an undisturbed carbonate sediment core under a pressure of 556 kg/cm2 produced a “rock” with sedimentary structures similar to typical ancient fine-grained limestones. Surprisingly, shells, foraminifera, and other fossils were not noticeably crushed, which indicates that absence of crushed fossils in ancient limestones can no longer be considered evidence that limestones do not comp
Authors
Eugene A. Shinn, Robert B. Halley, J. Harold Hudson, Barbara H. Lidz
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 ridges. Many m
Authors
Baerbel K. Lucchitta
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 mechanism f
Authors
Baerbel K. Lucchitta
Preliminary reconnaissance map showing landslides in Butler County, Pennsylvania
No abstract available.
Authors
John S. Pomeroy
Preliminary reconnaissance map showing landslides in Beaver County, Pennsylvania
No abstract available.
Authors
John S. Pomeroy
Reconnaissance map showing landslides in Washington County, Pennsylvania
No abstract available.
Authors
John S. Pomeroy
Late Quaternary depositional history, Holocene sea-level changes, and vertical crustal movement, southern San Francisco Bay, California
Sediments collected for bridge foundation studies at southern San Francisco Bay, Calif., record estuaries that formed during Sangamon (100,000 years ago) and post-Wisconsin (less than 10,000 years ago) high stands of sea level. The estuarine deposits of Sangamon and post-Wisconsin ages are separated by alluvial and eolian deposits and by erosional unconformities and surfaces of nondeposition, feat
Authors
Brian F. Atwater, Charles W. Hedel, Edward J. Helley