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Record #164658:

Basal-crevasse-fill origin of laminated debris bands at Matanuska Glacier, Alaska, U.S.A / Staci L. Ensminger, Richard B. Alley, Edward B. Evenson, Daniel E. Lawson, Grahame J. Larson.

Title: Basal-crevasse-fill origin of laminated debris bands at Matanuska Glacier, Alaska, U.S.A / Staci L. Ensminger, Richard B. Alley, Edward B. Evenson, Daniel E. Lawson, Grahame J. Larson.
Author(s): Ensminger, Staci L.
Alley, Richard B.
Evenson, Edward B.
Lawson, Daniel E.
Larson, Grahame J.
Date: 2001.
In: Journal of Glaciology. (2001.), Vol. 47(158) (2001)
Abstract: Discusses formation mechanisms for debris bands in glacier. Describes sampling of four laminated debris bands and adjacent englacial ice near the margin of Matanuska Glacier and subsequent analysis. Describes field relations and sediment characteristics. Reports ice- isotopic ratios (δ¹⁸O and δD) and composition (³H) and ice petrofabrics in and adjacent to debris bands. Reports debris bands significantly enriched in anthropogenic (³H) compared to adjacent englacial ice. Debris lacks coarse clasts associated with shearing or folding into the ice or squeezing/creep of till into large basal crevasses, but is similar to suspended load of subglacial discharge and of ice grown from supercooling of discharge. Concludes that common debris bands of Matanuska Glacier were formed by injection of turbid basal waters into basal crevasses.
Notes:

Journal of Glaciology. Vol. 47(158) :412-422 (2001).

Keywords: 551.324.22 -- Glaciers: Matanuska Glacier.
551.324.81 -- Glacier bands, lamination, layering and foliation.
E7 -- Glaciology: glacial geology and ice ages.
(73) -- United States.
(*49) -- Alaska.
(*491) -- Alaska, southcentral and southwest.
SPRI record no.: 164658

MARCXML

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245 00 ‡aBasal-crevasse-fill origin of laminated debris bands at Matanuska Glacier, Alaska, U.S.A /‡cStaci L. Ensminger, Richard B. Alley, Edward B. Evenson, Daniel E. Lawson, Grahame J. Larson.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2001.
300 ## ‡ap. 412-422 :‡bill., diags., tables.
500 ## ‡aJournal of Glaciology. Vol. 47(158) :412-422 (2001).
520 3# ‡aDiscusses formation mechanisms for debris bands in glacier. Describes sampling of four laminated debris bands and adjacent englacial ice near the margin of Matanuska Glacier and subsequent analysis. Describes field relations and sediment characteristics. Reports ice- isotopic ratios (δ¹⁸O and δD) and composition (³H) and ice petrofabrics in and adjacent to debris bands. Reports debris bands significantly enriched in anthropogenic (³H) compared to adjacent englacial ice. Debris lacks coarse clasts associated with shearing or folding into the ice or squeezing/creep of till into large basal crevasses, but is similar to suspended load of subglacial discharge and of ice grown from supercooling of discharge. Concludes that common debris bands of Matanuska Glacier were formed by injection of turbid basal waters into basal crevasses.
650 07 ‡a551.324.22 -- Glaciers: Matanuska Glacier.‡2udc
650 07 ‡a551.324.81 -- Glacier bands, lamination, layering and foliation.‡2udc
650 07 ‡aE7 -- Glaciology: glacial geology and ice ages.‡2local
651 #7 ‡a(73) -- United States.‡2udc
651 #7 ‡a(*49) -- Alaska.‡2udc
651 #7 ‡a(*491) -- Alaska, southcentral and southwest.‡2udc
700 1# ‡aEnsminger, Staci L.
700 1# ‡aAlley, Richard B.
700 1# ‡aEvenson, Edward B.
700 1# ‡aLawson, Daniel E.
700 1# ‡aLarson, Grahame J.
773 0# ‡7nnas ‡tJournal of Glaciology. ‡gVol. 47(158) (2001) ‡wSPRI-20534
917 ## ‡aUnenhanced record from Muscat, imported 2019
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