Annularia

Photographed by Michael P. Klimetz

Photographed by Michael P. Klimetz

Mazon Creek

Will County

ILLINOIS

Mazon Creek

Will County

ILLINOIS

Photographed by Michael P. Klimetz

Wigan

Lancashire

UNITED KINGDOM

Photographed by Michael P. Klimetz

Annularia stellata

Leon

SPAIN

Photographed by Michael P. Klimetz

Annularia sphenophylloides

Leon

SPAIN

Photographed by Michael P. Klimetz

[Sheared Impression in Slate]

Carboniferous

Newport

Newport County

RHODE ISLAND

Photographed by Michael P. Klimetz

Permian

Beijing

CHINA

Photographed by Michael P. Klimetz

Permian

Beijing

CHINA

Photographed by Michael P. Klimetz

Permian

Beijing

CHINA