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Record #124210:

Thaw modification of frost-fissure wedges, Richards Island, Pleistocene Mackenzie delta, western Arctic Canada / Julian B. Murton, Hugh M. French.

Title: Thaw modification of frost-fissure wedges, Richards Island, Pleistocene Mackenzie delta, western Arctic Canada / Julian B. Murton, Hugh M. French.
Author(s): Murton, Julian B.
French, Hugh M.
Date: 1993.
In: Journal of Quaternary Science : JQS. (1993.), Vol. 8(3) (1993)
Abstract: Specific processes of thaw modification (thermal erosion, collapse, subsidence, refreezing, loading, buoyancy, spreading, folding and shearing) are inferred from ice-wedge pseudomorphs, composite-wedge pseudomorphs, and deformed sand wedges. Thaw preservation is believed to result in selective preservation of pseudomorphs and wedges. Sand wedges are more likely to be preserved than are ice-wedge or composite-wedge pseudomorphs, because only those sand wedges that penetrate massive ice or icy sediments are prone to thaw modification. Furthermore, whereas ice wedges develop preferentially in ice-rich, fine-grained sediments (thaw-sensitive), their pseudomorphs appear to be selectively preserved in ice-poor, coarse-grained sediments (thaw-stable)
Notes:

Journal of Quaternary Science : JQS. Vol. 8(3) :185-196 (1993).

Keywords: 551.34 -- Geocryology. Frozen ground.
551.345.3 -- Permafrost, composition and structure. Ice wedges.
551.345.2 -- Permafrost, formation and decay.
551.345 -- Permafrost. Cryopedology.
536.421.1 -- Melting.
E8 -- Glaciology: frost action and permafrost.
(*41) -- Canada.
(*440) -- Northwest Territories.
(*470) -- Mackenzie District.
SPRI record no.: 124210

MARCXML

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100 1# ‡aMurton, Julian B.
245 10 ‡aThaw modification of frost-fissure wedges, Richards Island, Pleistocene Mackenzie delta, western Arctic Canada /‡cJulian B. Murton, Hugh M. French.
260 ## ‡a[S.l.] :‡b[s.n.],‡c1993.
300 ## ‡ap. 185-196 :‡bill., diags., table, map.
500 ## ‡aJournal of Quaternary Science : JQS. Vol. 8(3) :185-196 (1993).
520 3# ‡aSpecific processes of thaw modification (thermal erosion, collapse, subsidence, refreezing, loading, buoyancy, spreading, folding and shearing) are inferred from ice-wedge pseudomorphs, composite-wedge pseudomorphs, and deformed sand wedges. Thaw preservation is believed to result in selective preservation of pseudomorphs and wedges. Sand wedges are more likely to be preserved than are ice-wedge or composite-wedge pseudomorphs, because only those sand wedges that penetrate massive ice or icy sediments are prone to thaw modification. Furthermore, whereas ice wedges develop preferentially in ice-rich, fine-grained sediments (thaw-sensitive), their pseudomorphs appear to be selectively preserved in ice-poor, coarse-grained sediments (thaw-stable)
650 07 ‡a551.34 -- Geocryology. Frozen ground.‡2udc
650 07 ‡a551.345.3 -- Permafrost, composition and structure. Ice wedges.‡2udc
650 07 ‡a551.345.2 -- Permafrost, formation and decay.‡2udc
650 07 ‡a551.345 -- Permafrost. Cryopedology.‡2udc
650 07 ‡a536.421.1 -- Melting.‡2udc
650 07 ‡aE8 -- Glaciology: frost action and permafrost.‡2local
651 #7 ‡a(*41) -- Canada.‡2udc
651 #7 ‡a(*440) -- Northwest Territories.‡2udc
651 #7 ‡a(*470) -- Mackenzie District.‡2udc
700 1# ‡aFrench, Hugh M.
773 0# ‡7nnas ‡tJournal of Quaternary Science : JQS. ‡gVol. 8(3) (1993) ‡wSPRI-78713
917 ## ‡aUnenhanced record from Muscat, imported 2019
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