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A distinction between ice‐pushed and ice‐lifted landforms on lacustrine and marine coasts
Author(s) -
Gilbert Robert
Publication year - 1990
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290150103
Subject(s) - geology , seabed gouging by ice , keel , landform , antarctic sea ice , shelf ice , ice stream , littoral zone , ice sheet , geomorphology , arctic ice pack , drift ice , fast ice , fluvial , oceanography , sea ice , physical geography , cryosphere , structural basin , geography
Study of a small lake, Second Roach Pond, in Maine, U.S.A. clarifies the distinction between shoreline features created by ice push which occurs on both lacustrine and marine coasts, and those created by ice lift related to tidal action in the marine environment. Ice lifting occurred as littoral sediments were frozen into the lake ice, followed by a rise in water level due to damming of the lake before the nival melt each spring. In the period 1905 to 1969 prominent barricades were constructed by this means. A classification based on this distinction is proposed. Ice‐pushed landforms include ramparts, ridges in coarse and fine sediments, stone pavements, ice keel grooves, pushed boulder grooves, and tails off promontories. Ice‐lift features include boulder barricades, perched stones, stone garlands, and ice keel depressions.