Pictures of Mazon Creek Fossils

Out of the Francis Creek Shale in Illinois come Mazon Creek Fossils, dated from the Pennsylvanian Period, 325 to 286 million years ago. This noted lagerstatten, located in northeastern Illinois, has yielded over 400 species of flora and 320 species of fauna. Contained within siderite concretions, both hard and soft tissues of animal and plant materials are preserved. This page exhibits examples of plant materials: Annularia, Neuropteris scheuchzeri, and Calamites species; and examples of animal materials: Essexella asherae and a Pecten.

The pictures below depict the Mazon Creek fossil you will receive. Click on the thumbnail image to view an additional photograph of the fossils from Mazon Creek being offered for sale by Texas Rock Shop.

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All weights and measurements are approximate.

#FO2242 Annularia, Fossil Leaf Whorls of Extinct Horsetail - Pennsylvanian Period (325 - 286 mya) - Mazon Creek, Illinois - Weight: 15/16 pound - Measurement: 6.25" x 4.50" x .25" - Price: $ Sold - Comment: Single Part

#FO2243 - Pennsylvanian Period (325 - 286 mya) - Mazon Creek, Illinois - Weight: 1.25 pounds - Measurement: 4.50" x 3" x 1" - Price: $ Sold - Comment: Part and Counter-part

#FO2244 Fossil Seed Fern Leaf, Neuropteris scheuchzeri - Pennsylvanian Period (325 - 286 mya) - Mazon Creek, Illinois - Weight: 106.4 grams - Measurement: 4" x 1.50" x .50" - Price: $25.00 - Comment: Part and Counter-part

#FO2245 Calamites sp., Fossil Horsetail Stem - Pennsylvanian Period (325 - 286 mya) - Mazon Creek, Illinois - Weight: 133.5 grams - Measurement: 2.75" x 2" x 7/8" - Price: $15.00 - Comment: Part and Counter-part

#FO2246 Essexella asherae, Fossil Jellyfish - Pennsylvanian Period (325 - 286 mya) - Mazon Creek, Illinois - Weight: 68.3 grams - Measurement: 1.75" x 1.75" x .50" - Price: $8.00 - Comment: Part and Counter-part

#FO2247 Neuropteris sp. - Fossil Seed Fern Leaf - Pennsylvanian Period (325 - 286 mya) - Mazon Creek, Illinois - Weight: 37.0 grams - Measurement: 2" x 1.50" x 3/8" - Price: $ Sold - Comment: Part and Counter-part

#FO2248 Pecten - Fossil Bivalve - Pennsylvanian Period (325 - 286 mya) - Mazon Creek, Illinois - Weight: 56.7 grams - Measurement: 1.75" x 1.50" x 5/8" - Price: $10.00 - Comment: Part and Counter-part

All weights and measurements are approximate.

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