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单词 septarium
释义 septarium
[sep`tar·ē·ǝm]
GEOLOGY
A large (32-36 inches or 80-90 centimeters in diameter), spheroidal concretion, usually composed of argillaceous carbonate, characterized by internal cracking into irregular polygonal blocks that become cemented together by crystalline minerals. Also known as beetle stone; septarian boulder; septarian nodule; turtle stone.
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