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  • An adjective describing geologic features that are in an overlapping or staggered arrangement. Each is relatively short but collectively they form a linear zone.
  • A ridge or series of ridges formed by accumulations of drift built along the outer margin of an actively flowing glacier at any given time; a moraine that has been deposited at the lower or outer end of a glacier.
  • An interval of geologic time; a division of a period. (Example: Pleistocene Epoch).
  • Era
    A unit of geologic time that is next in magnitude beneath an eon; consists of two or more periods. (Example: Paleozoic Era).
  • A long, more or less continuous cliff or steep slope facing in one general direction; it generally marks the outcrop of a resistant layer of rocks, or the exposed plane of a fault that has moved recently.