Geological Oceanography of the Bering Shelf

1974 ◽  
pp. 141-156 ◽  
Author(s):  
Ghanshyam D. Sharma
Keyword(s):  
Bering Shelf

Tectonic Evolution of the Bering Shelf-Chukchi Sea-Artic Margin and Adjacent Landmasses

2002 ◽  
Author(s):  
Elizabeth L. Miller ◽  
Arthur Grantz ◽  
Simon L. Klemperer
Keyword(s):  
Tectonic Evolution ◽  
Chukchi Sea ◽  
Bering Shelf

Modern biogenic gas-generated craters (sea-floor “pockmarks”) on the Bering Shelf, Alaska

1979 ◽  
Vol 90 (12) ◽  
pp. 1144 ◽  
Author(s):  
HANS NELSON ◽  
D. R. THOR ◽  
M. W. SANDSTROM ◽  
K. A. KVENVOLDEN
Keyword(s):  
Sea Floor ◽  
Biogenic Gas ◽  
Bering Shelf

Crustal structure in the southern Bering Shelf and the Alaska Peninsula from inversion of surface-wave dispersion data

1989 ◽  
Vol 79 (6) ◽  
pp. 1883-1893
Author(s):  
Mansour Niazi ◽  
Kin-Yip Chun
Keyword(s):  
Crustal Structure ◽  
Velocity Structure ◽  
Structural Characteristics ◽  
Resolving Power ◽  
Surface Wave Dispersion ◽  
Bristol Bay ◽  
Alaska Peninsula ◽  
South Central ◽  
Bering Shelf ◽  
Group Velocities

Abstract Dispersion of surface waves in the southern Bering Shelf (Bristol Bay) and the Alaska Peninsula is investigated for a study of the regional crustal structure. Our data consist of five shallow earthquakes located along the Aleutian Arc and recorded by long-period, three-component seismographs sited in south-central Alaska. Both Love and Rayleigh group velocities are obtained through the application of the phase-matched filtering technique. The results are converted to equivalent pure-path data by appropriate adjustment using the published information for the continental Alaska. Treating the shear velocity of each layer as an independent parameter, the pure-path group velocities of Love and Rayleigh waves are jointly inverted in order to obtain a satisfactory agreement between the theoretical and the observed dispersion characteristics. Estimates of the resolving power of the inversion and uncertainty of the final velocity structure show substantial improvement over the previously published models. With their crustal thicknesses ranging between 33 and 36 km, none of the final models displays structural characteristics reminiscent of an oceanic crust. Over the northernmost path across the Bristol Bay, we found an indication of a weak low-velocity zone (five per cent reduction relative to the lid velocity) whose prominence diminishes towards the south.

An Anvilian (Early Pleistocene) Marine Fauna from Western Seward Peninsula, Alaska

1974 ◽  
Vol 4 (4) ◽  
pp. 441-470 ◽  
Author(s):  
D.M. Hopkins ◽  
R.W. Rowland ◽  
R.E. Echols ◽  
P.C. Valentine
Keyword(s):  
North Atlantic ◽  
Early Pleistocene ◽  
Middle Pleistocene ◽  
Northwestern Pacific ◽  
River Terrace ◽  
Bering Strait ◽  
Land Bridge ◽  
Marine Fauna ◽  
Seward Peninsula ◽  
Bering Shelf

Cover sediments of the York Terrace exposed near the California River, western Seward Peninsula, Alaska, yield mollusks, ostracodes, and foraminifera that lived during the Anvilian transgression of early Pleistocene age. The fossiliferous sediments lie at the inner edge of the York Terrace, a deformed wave-cut platform that extends eastward from Bering Strait along much of the southern coast of Seward Peninsula. The seaward margin is truncated by the little-deformed Lost River Terrace, carved during the Pelukian (Sangamonian) transgression. The early Pleistocene sediments seem to have been deposited between the first and second of four glaciations for which evidence can be found in the California River area.The California River fauna includes several extinct species and several species now confined to areas as remote as the northwestern Pacific and north Atlantic. The fauna probably lived in water temperatures much like those of the present time but deeper water on the Bering Shelf is suggested.The presence of an early Pleistocene fauna at the inner edge of the York Terrace at California River shows that the terrace was largely carved before and during early Pleistocene time. However, a marine fauna apparently of middle Pleistocene age is found on the York Terrace near Cassiterite Peak, and this seems to indicate that the terrace remained low until middle Pleistocene time. Uplift of the York Terrace probably was accompanied by uplift of Bering Strait. The strait may have been deeper, and there may have been no land bridge between the Seward Peninsula of Alaksa and the Chukotka Peninsula of Siberia during most of early and middle Pleistocene time.

Geology of Bering Shelf: ABSTRACT

AAPG Bulletin ◽  
1976 ◽  
Vol 60 ◽  
Author(s):  
Sankey L. Blanton, Jr.
Keyword(s):  
Bering Shelf

Uplifted Trench Sediments: Southwestern Alaska-Bering Shelf Edge

Science ◽  
1972 ◽  
Vol 175 (4026) ◽  
pp. 1103-1105 ◽  
Author(s):  
J. C. Moore
Keyword(s):  
Shelf Edge ◽  
Trench Sediments ◽  
Bering Shelf ◽  
Southwestern Alaska
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