GSA Connection

November 2012


Geoscience Trivia


  1. When was the most recent M~9.0 Kamchatka "megathrust" earthquake?
    4 November 1952 (see sources 1 and 2)

  2. What does the image portray?
    Alternating bands of red hematite, siliceous chert, and argillaceious shale (aka, a banded iron formation, or BIF). From A History of Earth in 100 Groundbreaking Discoveries by Douglas Palmer (Firefly Books, Oct. 2011, p. 124–125).

  3. When and where did the devastating "Big Thompson Flood" occur?
    31 July 1976 in Colorado's Big Thompson Canyon. (See Geology Underfoot: Along Colorado's Front Range by Lon Abbott and Terri Cook and this Wikipedia article.)

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