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erratic
(redirected from Erratics)

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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′rad·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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By soliciting donations from local building stone and other materials suppliers, as well as collecting glacial erratics and other local stone, it should be possible to accumulate a collection of rocks that can be incorporated into campus landscaping, and combined with signage to provide some information about each specimen.
The Waterloo Earth Sciences Museum by Russell, Peter I.; Motz, John E. / Geoscience Canada
Erratics from these deposits differ from glacial strata in many aspects, such as rock types and preservation of existing fossils.
Ordovician sponges (Porifera) and other silicifications from Baltica ... by Rhebergen, Freek / Estonian Journal of Earth Sciences
Much of the improvement in September was due to oil and so-called erratics, goods such as aircraft and precious stones where there is no set pattern to trade.
UK trade gap narrows by guardian.co.uk / guardian.co.uk
 
 
 
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