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erratic
(redirected from Erratic block)

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia 0.02 sec.
erratic
a piece of rock that differs in composition, shape, etc., from the rock surrounding it, having been transported from its place of origin, esp by glacial action

erratic [ə′radĀ·ik]
(geology)
A rock fragment that has been transported a great distance, generally by glacier ice or floating ice, and differs from the bedrock on which it rests.


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