Spence Shale

The Spence Shale is a shale geologic formation in Idaho and Utah.

It preserves fossils dating back to the Cambrian period.

单词	Spence Shale
释义	Spence Shale 英语百科 Spence Shale The Spence Shale is a shale geologic formation in Idaho and Utah. It preserves fossils dating back to the Cambrian period.
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