Archimedes screw bryozoan, 345 million years old


SKU: 8799

This fascinating fossil is part of the structure formed by a colony of bryozoans, marine invertebrates that lived in colonies, like coral, and still exist today.  This specific form is now extinct however.  This fossil came from Alabama, and is approximately 345 million years old.

9/16 inch (1.4 cm) wide, 1/2 inch (1.3 cm) deep and 7/8 inch (2.2 cm) tall.