Publications
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Spurs and grooves revisited: construction versus erosion, Looe Key Reef, Florida
Six of 12 core holes drilled at Looe Key Reef (24°37'18"N. 81°24'24"W) by a diver-operated coring device penetrated a spur and groove system. Drilling indicated that: (II the spurs and grooves formed over at least 5 m of carbonate reef sand: (2) the underlying Pleistocene surface is essentially flat and therefore could not control or initiate spacing of spurs or grooves; (3) only the thin seaward
Authors
E.A. Shinn, J.H. Hudson, Daniel M. Robbin, Barbara H. Lidz
The geology of Europa
The map units and lineations of Europa are detailed, and the geologic processes, and history, and thick and thin ice models of the satellite are discussed. It is concluded that Europa lacks evidence of a horizontally stratified crust; the geology appears characterized by disruption of the crust and intrusions into an icy shell. The surface consists of plains and mottled terrain, the former being o
Authors
Baerbel K. Lucchitta, Laurence A. Soderblom
Landslides in the Greater Pittsburgh region, Pennsylvania
No abstract available.
Authors
John S. Pomeroy
Landslide overview map of the conterminous United States
The accompanying landslide overview map of the conterminous United States is one of a series of National Environmental Overview Maps that summarize geologic, hydrogeologic, and topographic data essential to the assessment of national environmental problems. The map delineates areas where large numbers of landslides exist and areas which are susceptible to landsliding. It was prepared by evaluating
Authors
Dorothy H. Radbruch-Hall, Roger B. Colton, William E. Davies, Ivo Lucchitta, Betty A. Skipp, David J. Varnes
Paleomagnetic data from the Coso Range, California and current status of the Cobb Mountain normal geomagnetic polarity event
Two basalt flows which erupted about 1.08 m.y. ago in the Coso Range, California, have normal magnetic polarity and thus provide additional evidence for the Cobb Mountain normal polarity event. A review of available data confirms that this event was of geomagnetic origin. A mean age of 1.10 ± 0.02 m.y. B.P. for the Cobb Mountain normal polarity event was found to best fit all available radiometric
Authors
Edward A. Mankinen, C. Sherman Grommé
International Geomagnetic Reference Field 1980; charts and grid values, IAGA Bulletin No. 47
No abstract available.
Authors
Eugene B. Fabiano, N. W. Peddie, D.R. Barraclough, A. K. Zunde
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: January 1982
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
John B. Townshend, J.E. Papp, E.A. Sauter, L.Y. Torrence
International geomagnetic reference field 1980: a report by IAGA Division I working group.
Describes the recommendations of the working group, which suggested additions to IGRF because of the cumulative effect of the inevitable uncertainties in the secular variation models which had led to unacceptable inaccuracies in the IGRF by the late 1970's. The recommendations were accepted by the International Association of Geomagnetism and Aeronomy on August 15, 1981 at the 4th Scientific Assem
Authors
N. W. Peddie
Huge landslide blocks in the growth of piton de la fournaise, La réunion, and Kilauea volcano, Hawaii
Piton de la Fournaise, on the island of La Réunion, and Kilauea volcano, on the island of Hawaii, are active, basaltic shield volcanoes growing on the flanks of much larger shield volcanoes in intraplate tectonic environments. Past studies have shown that the average rate of magma production and the chemistry of lavas are quite similar for both volcanoes. We propose a structural similarity — speci
Authors
Wendell A. Duffield, Laurent Stieltjes, Jacques Varet
The memory of the accreting plate boundary and the continuity of fracture zones
A detailed aeromagnetic anomaly map of the Mesozoic seafloor-spreading lineations southwest of Bermuda reveals the dominant magnetic grain of the oceanic crust and the character of the accreting boundary at the time of crustal formation. The magnetic anomaly pattern is that of a series of elongate lobes perpendicular to the fracture zone (flowline) trends. The linear sets of magnetic anomaly peaks
Authors
Hans Schouten, Kim D. Klitgord