Publications
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The importance of earthquake-induced landslides to long-term slope erosion and slope-failure hazards in seismically active regions The importance of earthquake-induced landslides to long-term slope erosion and slope-failure hazards in seismically active regions
This paper describes a general method for determining the amount of earthquake-induced landsliding that occurs in a seismically active region over time; this determination can be used as a quantitative measure of the long-term hazard from seismically triggered landslides as well as a measure of the importance of this process to regional slope-erosion rates and landscape evolution. The...
Authors
D. K. Keefer
Hydrologic hazards at Alaska volcanoes?Chakachatna River Basin near Crater Peak, Spurr Volcano Hydrologic hazards at Alaska volcanoes?Chakachatna River Basin near Crater Peak, Spurr Volcano
No abstract available.
Authors
J.M. Dorava, C. F. Waythomas
Historical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico Historical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico
A new, state-of-the-art method for mapping historical shorelines from maps and aerial photographs, the Digital Shoreline Mapping System (DSMS), has been developed. The DSMS is a freely available, public domain software package that meets the cartographic and photogrammetric requirements of precise coastal mapping, and provides a means to quantify and analyze different sources of error in...
Authors
E. Robert Thieler, William W. Danforth
Overview of the southern Lake Michigan coastal erosion study Overview of the southern Lake Michigan coastal erosion study
No abstract available.
Authors
David W. Folger, Steven M. Colman, Peter W. Barnes
Decade-scale trend in sea water salinity revealed through d18O analysis of Montastraea annularis annual growth bands Decade-scale trend in sea water salinity revealed through d18O analysis of Montastraea annularis annual growth bands
Stable oxygen isotope ratios (1)180) of coral skeletons are influenced by ambient water temperature and by the oxygen isotope ratio in the surrounding sea water, which, in turn, is linked to evaporation (salinity) and precipitation. To investigate this relationship more thoroughly, we collected hourly temperature data from the Hen and Chickens Reef in the Florida Keys between 1975 and...
Authors
Robert B. Halley, Peter K. Swart, Richard E. Dodge, J. Harold Hudson
Landslides triggered by the Northridge earthquake Landslides triggered by the Northridge earthquake
No abstract available.
Authors
R.W. Jibson, E. L. Harp, D. K. Keefer, R. C. Wilson
Landslides in colluvium Landslides in colluvium
No abstract available.
Authors
Robert W. Fleming, Arvid M. Johnson
Seismic structure of the uppermost mantle beneath the Kenya rift Seismic structure of the uppermost mantle beneath the Kenya rift
A major goal of the Kenya Rift International Seismic Project (KRISP) 1990 experiment was the determination of deep lithospheric structure. In the refraction/wide-angle reflection part of the KRISP effort, the experiment was designed to obtain arrivals to distances in excess of 400 km. Phases from interfaces within the mantle were recorded from many shotpoints, and by design, the best...
Authors
Gordon R. Keller, J. Mechie, L.W. Braile, Walter D. Mooney, C. Prodehl
Acoustic mapping as an environmental management tool: I. detection of barrels of low-level radioactive waste, Gulf of the Farallones National Marine Sanctuary, California Acoustic mapping as an environmental management tool: I. detection of barrels of low-level radioactive waste, Gulf of the Farallones National Marine Sanctuary, California
The oceans have been and will continue to be disposal sites for a wide variety of waste products. Often these wastes are not dumped at the designated sites or transport occurs during or after dumping, and, subsequent attempts to monitor the effects the waste products have on the environment are inadequate because the actual location of the waste is not known. Acoustic mapping of the...
Authors
Herman A. Karl, William C. Schwab, A. St. C. Wright, David E. Drake, John L. Chin, William W. Danforth, Edward Ueber
Deep structure beneath Lake Ontario: Crustal-scale Grenville subdivisions Deep structure beneath Lake Ontario: Crustal-scale Grenville subdivisions
Lake Ontario marine seismic data reveal major Grenville crustal subdivisions beneath central and southern Lake Ontario separated by interpreted shear zones that extend to the lower crust. A shear zone bounded transition between the Elzevir and Frontenac terranes exposed north of Lake Ontario is linked to a seismically defined shear zone beneath central Lake Ontario by prominent...
Authors
D. A. Forsyth, Bernd Milkereit, Colin A. Zelt, D. J. White, R. M. Easton, Deborah R. Hutchinson
Lake Michigan's late Quaternary limnological and climate history from ostracode, oxygen isotope, and magnetic susceptibility Lake Michigan's late Quaternary limnological and climate history from ostracode, oxygen isotope, and magnetic susceptibility
The limnology of Lake Michigan has changed dramatically since the late Pleistocene in response to the expansion and contraction of continental glaciers, to differential isostatic rebound, and to climate change. The lake sediment's stratigraphic trends, magnetic susceptibility, δ18O, and ostracode species abundance ratios provide criteria to identify the lake's response to glacial ice and...
Authors
Richard M. Forester, Steven M. Colman, Richard L. Reynolds, Loyd D. Keigwin