Manganese Biominerals (Todorokite, Romanechite, Birnessite) Ps. After Arthropod Burrows (Ref: CHESA-19)
Chesapeake Bay, Calvert County, Maryland, USA
60mm x 60mm x 30mm
minID: 222-PWJ
This is a Manganese Biominerals (Todorokite, Romanechite, Birnessite) Ps. After Arthropod Burrows from Chesapeake Bay, Calvert County, Maryland, USA. Among the most distinctive specimens from the new find are mineralized arthropod burrows and "gyroliths" - enigmatic helical burrows occasionally found in the Miocene sediments of southern Maryland.From: The Arkenstone
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