单词	periglacial
释义	periglacial /ˌpɛrɪˈɡleɪʃ(ə)l / /ˌpɛrɪˈɡsɪəleɪʃ(ə)l/ adjective Geology Relating to or denoting an area adjacent to a glacier or ice sheet or otherwise subject to repeated freezing and thawing.These may be of fluviatile, glacial, periglacial, lacustrine, aeolian, or marine origin.... Sandstone-filled cracks exposed at the unconformity are viewed as periglacial frost fissures. Hence the cracks probably developed following glacial retreat when the area containing the eroded surface of Bedford Sandstone was in a periglacial setting.
随便看	tide someone over tide table tidewaiter tidewater tideway tidily tidiness tiding tidings tidy tie tie-back tie beam tiebreak tiebreaker tie clip tied tie-down tied to someone's apron strings tie-dye tief tie-in tie into tieless tie line

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