Burgess Shale
(mineralogy) A triclinic-pinacoidal mineral containing arsenic, hydrogen, iron, and oxygen.
A speech, given by U.S. President Abraham Lincoln at Gettysburg, Pennsylvania on November 19, 1863, in memory of the Battle of Gettysburg, which has been fought there the past July.
plural of photocopier
A rock formation in the Canadian Rockies that contains very many fossils from the Cambrian period.
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