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High porosity of basal till at Burroughs Glacier, southeastern Alaska

Debris-rich basal ice at Burroughs glacier, southeastern Alaska, has 60 vol% to 70 vol% debris. Recently deposited basal till exceeds 60 vol% sediment with 30% to almost 40% porosity. Where basal ice is very rich in debris, basal till is deposited through melt out with only slight compaction of the...

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Published in:	Geology (Boulder) 1992-09, Vol.20 (9), p.849-852
Main Authors:	Ronnert, Lars, Mickelson, David M
Format:	Article
Language:	English
Subjects:	Alaska basal till Burroughs Glacier clastic sediments debris Geology geomorphology glacial geology glacial sedimentation glacial transport Glacier Bay National Park Glaciers porosity processes Quaternary geology sedimentation sediments Southeastern Alaska till United States
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creator	Ronnert, Lars Mickelson, David M
description	Debris-rich basal ice at Burroughs glacier, southeastern Alaska, has 60 vol% to 70 vol% debris. Recently deposited basal till exceeds 60 vol% sediment with 30% to almost 40% porosity. Where basal ice is very rich in debris, basal till is deposited through melt out with only slight compaction of the debris. Porosity this high in till is commonly associated with subglacially deforming and dilated sediment. However, the recently deposited basal melt-out till at Burroughs glacier has not been deformed after deposition, but has porosity values similar to tills elsewhere interpreted to be subglacially deforming and dilated in an unfrozen state. High porosity can occur in basal melt-out till deposited directly by basal melt out.
doi_str_mv	10.1130/0091-7613(1992)020<0849:HPOBTA>2.3.CO;2
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High porosity can occur in basal melt-out till deposited directly by basal melt out.</description><subject>Alaska</subject><subject>basal till</subject><subject>Burroughs Glacier</subject><subject>clastic sediments</subject><subject>debris</subject><subject>Geology</subject><subject>geomorphology</subject><subject>glacial geology</subject><subject>glacial sedimentation</subject><subject>glacial transport</subject><subject>Glacier Bay National Park</subject><subject>Glaciers</subject><subject>porosity</subject><subject>processes</subject><subject>Quaternary geology</subject><subject>sedimentation</subject><subject>sediments</subject><subject>Southeastern Alaska</subject><subject>till</subject><subject>United States</subject><issn>0091-7613</issn><issn>1943-2682</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><recordid>eNpdkNFKwzAUhoMoOKfvELwQRbudJG3aqAjb0E0YzIt5HdI23TqzZSYtsre3paLg1bn5zn_-8yE0JDAghMEQQJAg5oRdEyHoDVB4hCQU97O3xXg5eqIDNpgsHugR6hERsoDyhB6j3u_WKTrzfgNAwihOeuh5Vq7WeG-d9WV1wLbAqfLK4Ko0BqsKj2vnbL1aezw1Kiu1u8Pe1tVaK19pt8Mjo_yHOkcnhTJeX_zMPnp_eV5OZsF8MX2djOaBYoxXgeKFzlmaJkyQrKBJDEoAUKUYsCwPOVOQaR5xSGkk0iKKC64ZJSSnEc1JRlkfXXW5e2c_a-0ruS19po1RO21rLykIHoqEN-DlP3Bja7drujVMo1FENG6gaQdlzffe6ULuXblV7iAJyNa1bK3J1ppsXcvGtWxdy861pJLJyUK2vW67pJW2vrG0y_SXdSb_u9rtsygOI_YNPkWDEw</recordid><startdate>19920901</startdate><enddate>19920901</enddate><creator>Ronnert, Lars</creator><creator>Mickelson, David M</creator><general>Geological Society of America (GSA)</general><general>Geological Society of America</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>19920901</creationdate><title>High porosity of basal till at Burroughs Glacier, southeastern Alaska</title><author>Ronnert, Lars ; Mickelson, David M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a336t-a6fed3bb8391cf2870a9002aa303cd463a0ce6560b259bf57f6e3211d252d1c23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Alaska</topic><topic>basal till</topic><topic>Burroughs Glacier</topic><topic>clastic sediments</topic><topic>debris</topic><topic>Geology</topic><topic>geomorphology</topic><topic>glacial geology</topic><topic>glacial sedimentation</topic><topic>glacial transport</topic><topic>Glacier Bay National Park</topic><topic>Glaciers</topic><topic>porosity</topic><topic>processes</topic><topic>Quaternary geology</topic><topic>sedimentation</topic><topic>sediments</topic><topic>Southeastern Alaska</topic><topic>till</topic><topic>United States</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ronnert, Lars</creatorcontrib><creatorcontrib>Mickelson, David M</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Geology (Boulder)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ronnert, Lars</au><au>Mickelson, David M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High porosity of basal till at Burroughs Glacier, southeastern Alaska</atitle><jtitle>Geology (Boulder)</jtitle><date>1992-09-01</date><risdate>1992</risdate><volume>20</volume><issue>9</issue><spage>849</spage><epage>852</epage><pages>849-852</pages><issn>0091-7613</issn><eissn>1943-2682</eissn><abstract>Debris-rich basal ice at Burroughs glacier, southeastern Alaska, has 60 vol% to 70 vol% debris. 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language	eng
recordid	cdi_proquest_miscellaneous_20964986
source	AUTh Library subscriptions: Society of Exploration Geophysicists
subjects	Alaska basal till Burroughs Glacier clastic sediments debris Geology geomorphology glacial geology glacial sedimentation glacial transport Glacier Bay National Park Glaciers porosity processes Quaternary geology sedimentation sediments Southeastern Alaska till United States
title	High porosity of basal till at Burroughs Glacier, southeastern Alaska
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