Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Francis P. Shepard"'
Autor:
Francis P. Shepard
Publikováno v:
Marine Geology. 31:M69-M76
The slope of the sea floor down from the north side of St. Croix Island to the Virgin Island Basin, with an average declivity of 50%, is among the steepest scarps that have been surveyed to date. Apparently the north side of the island is cut off by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3eef609ee3407c9e324689dc83d9f297
https://doi.org/10.1016/0025-3227(79)90034-3
https://doi.org/10.1016/0025-3227(79)90034-3
Autor:
Francis P. Shepard, Robert F. Dill
Publikováno v:
Marine Geology. 24:M39-M45
Currents in the heads of two canyons off the north shore of St. Croix, U.S. Virgin Islands are characterized by slow velocity with high-frequency alternations of direction and occasional periods of relatively strong downcanyon flows; the latter occur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35ad2e65044b3d1a1de15cbdbc8cd0fc
https://doi.org/10.1016/0025-3227(77)90025-1
https://doi.org/10.1016/0025-3227(77)90025-1
Autor:
G.G. Kuhn, Francis P. Shepard
Publikováno v:
Marine Geology. 51:139-161
In the past there has been little attempt made to describe and explain the various types of sea arches that are found along the coasts of the world. Since we have some good examples of arches, shown in old photographs around the Point La Jolla area i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c4e0bf6370b8359803b63ee78731c56
https://doi.org/10.1016/0025-3227(83)90094-4
https://doi.org/10.1016/0025-3227(83)90094-4
Autor:
Neil F. Marshall, Francis P. Shepard
Publikováno v:
Marine Geology. 18:313-323
Dives in Lockheed's submarine “Deep Quest” followed the floor of the fan valley and outer gorge of Coronado Canyon, southwest of the California—Baja California border. Both the fan valley and outer gorge have meandering courses. Basin depressio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de11bdd7f1d176be66ef2486cbb5ba37
https://doi.org/10.1016/0025-3227(75)90018-3
https://doi.org/10.1016/0025-3227(75)90018-3
Publikováno v:
Deep Sea Research and Oceanographic Abstracts. 21:691-706
Earlier work indicated that currents move alternately up and down the floors of submarine canyons with greater average speeds and longer duration downcanyon. Now we find there are roughly synchronous movements up to at least 34 m above the canyon flo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d76eb2b1cb479ab2efa414aebed62cbe
https://doi.org/10.1016/0011-7471(74)90077-1
https://doi.org/10.1016/0011-7471(74)90077-1
Publikováno v:
Marine Geology. 20:1-6
A 45-km belt of large symmetrical sediment waves extends along the west coast of Mexico west of Manzanillo between depths of 320 and 770 m. They are thought to be the result of a strong subsurface current that changes seasonally from southeast to nor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbcc74d21ace002332b5828f7720d2ae
https://doi.org/10.1016/0025-3227(76)90071-2
https://doi.org/10.1016/0025-3227(76)90071-2
Autor:
Francis P. Shepard
Publikováno v:
The Journal of Geology. 84:343-350
Alternating up- and downcanyon currents in the heads of submarine canyons have high-frequency reversals, and, in general, the time interval between alternations increases with depth of the canyon axis until it approximates the period of semidiurnal t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e484c15d764ec0e0dc945508d796dee
https://doi.org/10.1086/628199
https://doi.org/10.1086/628199
Autor:
Francis P. Shepard
Publikováno v:
Marine Geology. 19:131-138
Alternating up- and downcanyon currents with velocities up to 50 cm/sec are found in submarine canyons. These alternations have patterns that usually can be matched between adjacent stations in the same canyon, even where separated by as much as 16 k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ca0de19b7158e8865d219bc22066ef7
https://doi.org/10.1016/0025-3227(75)90065-1
https://doi.org/10.1016/0025-3227(75)90065-1
Autor:
Francis P. Shepard, John D. Milliman
Publikováno v:
Marine Geology. 28:245-251
At the shallow heads of canyons and seavalleys (shoaler than about 250 m), currentmeter records have shown high frequency of up- and downvalley alternation, but in the seavalley off the Fraser Delta at an axial depth as shallow as 85 m, the alternati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d48e822495150aa621856374c1f68fc5
https://doi.org/10.1016/0025-3227(78)90020-8
https://doi.org/10.1016/0025-3227(78)90020-8