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bergschrunds

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Journal Article
Journal: Geology
Published: 01 September 2012
Geology (2012) 40 (9): 779–782.
... from three cirque glacier bergschrunds, including the first temperature series recorded at depth throughout most of an annual cycle. Compared to the ambient air, the bergschrunds were colder in summer and warmer in winter. Freeze-thaw cycles were rare, and relatively stable subfreezing temperatures...
FIGURES
Image
Temperature (bold line) and relative light intensity (thin line) at depth i...
Published: 01 September 2012
Figure 3. Temperature (bold line) and relative light intensity (thin line) at depth in two bergschrunds. Light intensity is a proxy for the extent bergschrund is open. In late summer, temperature and light at ∼10 m depth vary daily. In three of four autumn records, temperatures stabilize
Image
Measured temperature (left axis) and modeled frost cracking rates (right ax...
Published: 01 September 2012
Figure 2. Measured temperature (left axis) and modeled frost cracking rates (right axis) for subaerial headwall and bergschrunds. Each panel shows modeled crack growth rates at two depths in the headwall. Horizontal gray bars delineate nominal values for frost cracking window (see text
Image
A: Example of schrundlines, Great Western Divide, Sierra Nevada, California...
Published: 01 September 2012
Figure 1. A: Example of schrundlines, Great Western Divide, Sierra Nevada, California. B: West Washmawapta Glacier (WWG) and surrounding cirque (51.177°N, 116.33°W), highlighting sensor locations and prominent schrundline; view is to west. C: South wall bergschrund at WWG. In photo, verglas coats
Image
Wire-line logs illustrating aspects of K2 sequence set. Well locations are ...
Published: 01 March 2004
Figure 9 Wire-line logs illustrating aspects of K2 sequence set. Well locations are shown in Figure 8 . Candidate sequence boundaries are shown for illustrative purposes, although well density is insufficient for reliable correlation. Depositional sequences identified in the Bergschrund well
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—Log from the 1 <b>Bergschrund</b> discovery well for Alpine field, showing gamma-...
Published: 01 July 1998
Figure 12 —Log from the 1 Bergschrund discovery well for Alpine field, showing gamma-ray and resistivity curves.
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—Porosity-permeability plots for productive Alpine sandstone, 1 <b>Bergschrund</b>...
Published: 01 July 1998
Figure 13 —Porosity-permeability plots for productive Alpine sandstone, 1 Bergschrund and 1 Alpine wells, Alpine field.
Journal Article
Journal: The Leading Edge
Published: 01 July 2001
The Leading Edge (2001) 20 (7): 730–738.
... ) and owned by Phillips Alaska (78%) and Anadarko Petroleum (22%), is estimated to contain more than 400 million barrels of proven plus potential oil and 1 billion barrels of oil in place. Following the discovery well drilled in 1994 (the ARCO Bergschrund 1), the field was delineated over two successive...
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Journal Article
Journal: GSA Bulletin
Published: 01 August 1991
GSA Bulletin (1991) 103 (8): 1104–1108.
...ROGER LEB. HOOKE Abstract The principal points of water input to a glacier are the bergschrund in cirques, and crevasse fields lower on the glacier. Crevasse fields commonly occur over convexities at the heads of overdeepenings in glacier beds. The amplitude of subglacial water-pressure...
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1998
AAPG Bulletin (1998) 82 (7): 1281–1299.
...Figure 12 —Log from the 1 Bergschrund discovery well for Alpine field, showing gamma-ray and resistivity curves. ...
FIGURES | View All (16)
Journal Article
Journal: GSA Bulletin
Published: 01 January 2013
GSA Bulletin (2013) 125 (1-2): 229–248.
... exist at the interface between glacial and periglacial processes, where rock-wall, glacial, fluvial, and groundwater processes are all acting simultaneously. A given rock, for example, may release from the headwall, fall into the bergschrund, participate in subglacial abrasion, be flushed from...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 2004
AAPG Bulletin (2004) 88 (3): 279–302.
...Figure 9 Wire-line logs illustrating aspects of K2 sequence set. Well locations are shown in Figure 8 . Candidate sequence boundaries are shown for illustrative purposes, although well density is insufficient for reliable correlation. Depositional sequences identified in the Bergschrund well...
FIGURES | View All (15)
Journal Article
Journal: Geology
Published: 01 January 2015
Geology (2015) 43 (1): 35–38.
.... Sanders et al. (2012) showed how rock fracturing on cirque headwalls and within the bergschrund of a cirque glacier via ice segregation may drive headwall retreat. Headwall erosion in this manner is most effective when ice is present in the basin. Frost cracking within certain temperature—and thus...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1933
AAPG Bulletin (1933) 17 (10): 1194–1212.
... that the main snow-ice mass in a cirque tends to pull away from the rock walls to form the bergschrund. The Groesbeck-Mexia-Powell-Sulphur River line of faults and the Cherokee-Anderson County line of faults look as if they were such bergschrund-like lines of faulting. That latter line of faulting lies...
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Journal Article
Journal: Geology
Published: 24 June 2021
Geology (2021) 49 (10): 1209–1213.
.... , Cuffey , K.M. , Moore , J.R. , MacGregor , K.R. , and Kavanaugh , J.L. , 2012 , Periglacial weathering and headwall erosion in cirque glacier bergschrunds : Geology , v. 40 , p. 779 – 782 , https://doi.org/10.1130/G33330.1 . Shuster , D.L. , Cuffey , K.M. , Sanders...
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Journal Article
Journal: Geology
Published: 01 April 2007
Geology (2007) 35 (4): 375–378.
..., erosion of the lower headwall (i.e., the headwall below the bergschrund) by glacial quarrying undermines the upper headwall ( Hooke, 1991 ). Both of these processes are likely aided by bedrock fracturing on the headwall caused by topographically induced stress ( Miller and Dunne, 1996 ). In either case...
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Journal Article
Journal: Geology
Published: 01 November 2014
Geology (2014) 42 (11): 1019–1022.
... – 230 . Sanders J.W. Cuffey K.M. Moore J.R. MacGregor K.R. Kvanaugh J.L. , 2012 , Periglacial weathering and headwall erosion in cirque glacier bergschrunds : Geology , v. 40 , p. 779 – 782 , doi:10.1130/G33330.1. Schelling D. , 1992 , The tectonostratigraphy...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 June 2014
AAPG Bulletin (2014) 98 (6): 1235–1267.
... Upper Kuparuk Fm. Shublik M1 34 wildcat 1 OCS 0334 (Mukluk) 70.6833 − 150.92 7360 7372 Upper Kuparuk Shublik B1 5 Colville River 1 Bergschrund 70.3522 − 150.9163 6837 6932 Kingak Sh., Alpine Sand Kingak CR22 16 Colville River CD1-22 Colville River...
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Journal Article
Published: 27 May 2020
Environmental and Engineering Geoscience (2020) 26 (2): 201–215.
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1968
AAPG Bulletin (1968) 52 (3): 420–444.
... away from it. This resembles the familiar “Bergschrund” crevasse where a glacier pulls away from a mountain ice field. It is explained easily as that zone along which the creeping sediments are torn loose from the stationary area. This zone coincides in the Gulf Coast with the approximate subsurface...
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