Author(s): W. F. Weeks; Austin Kovacs
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Keywords: No Keywords
Abstract: Cross-sectional profiles, internal structures, temperatures, salinities and brine volumes have been obtained from eight pressure ridges off Barrow, Alaska. Two of these ridges are described in detail and underwater photographs of the ridge keels are shown. Ridges form by either marginal "crushing" or overthrusting. Lack of isostatic adjustment appears to be common. The degree of bonding between ice blocks in a ridge is related to the cold reserve of the blocks when they are incorporated into the ridge. Representative ridge salinities are 4ppt and the keels are commonly at near melting temperatures (brine volumes between 40 and 120ppt). The repose angles of the upper and lower parts of the ridges appear similar.
Year: 1970