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Collection Tier:
Tier 3

Fossils ➔ Bivalve


This specimen is a siderite concretion that was split open to reveal an impression of a bivalve. It was discovered in Mazon Creek, Illinois. 

Mazon Creek, Illinois is a famous fossil locality containing plants and animals from 309 million years ago. These fossils formed from a large flooding event that rapidly buried organisms, allowing for soft parts to be preserved.

5.50-2" h 1.50-2.5" w .75-1" d
Current Location Status:
On Exhibit

F is for Fossils ()

Discovery Kit: Fossils (October 25 2019)
Discovery Kits include a variety of artifacts and specimens from the Museum’s Collection that allow students to investigate global and local objects. The Collections support the Museum’s mission of inspiring curiosity and discovery around science, history, and culture. Each kit includes objects from the Museums archives, helpful resources and suggested activities. Discovery Kits are a great way for teachers to incorporate primary source and object-based learning into the classroom or as a way to prepare for or extend a Museum visit.        

Virtual Discovery Kit: Fossils (April 2020)
Calling all paleontologists! Step back on the geological timeline to explore a variety of plant and animal fossils. Learn all about the science of fossils and how prehistoric creatures lived, ate, and moved about our world.