Acanthoscaphites nodosus Ammonoid Fossil

 

The image shown above is ammonoid mollusk fossil called Acanthoscaphites nodosus (Owen, 1852). This animal fossil dates to the  Late Maastrichtian Stage, Cretaceous Period between 144 and 65 million years ago of the Mesozoic Era. It was found Montana, USA. 

The fossil was on display in the Evolving Planet section of The Field Museum of Natural History in Chicago Illinois, USA as of August 2020. Accession number is PE3908.

Species named by David Dale Owen, he collected during geological surveys of Wisconsin, Iowa, and Minnesota. Published in 1852 and at that time called Scaphites nodosus. The genus was named by Nowak in 1912.

Neuropteris inflata Fossil of Mazon Creek

 

Above is an image of part of a seed fern frond plant fossil called Neuropteris inflata (Lesquereux). This plant fossil dates to the age Moscovian/Desmoinesian of the Carboniferous (Pennsylvanian) Period between 354 and 290 million years ago. It was found Mazon Creek, Illinois, USA. Like most fossils found at this locality, it was inside a nodule. The layer to fossil was found is the Francis Creek Shale.

The fossil was on display in the Evolving Planet section of The Field Museum of Natural History in Chicago Illinois, USA as of August 2020. Accession number is P30763. They have quite an extensive collection of Mazon Creek fossils at the exhibit.

The Field Museum produced a visual PDF of some of the fossils found at Mazon Creek. It can be found at this link:

https://fieldguides.fieldmuseum.org/sites/default/files/rapid-color-guides-pdfs/534_usa-age_fossils.pdf

Crenulopteris acadica Tree Fern Fossil

 

Above is an image of a tree fern frond plant fossil called Crenulopteris acadica (Bell, 1962). This plant fossil dates to the Carboniferous (Pennsylvanian) Period between 354 and 290 million years ago. It was found Mazon Creek, Illinois, USA. Like most fossils found at this locality, it was inside a nodule. The layer to fossil was found is the Francis Creek Shale.

The fossil was on display in the Evolving Planet section of The Field Museum of Natural History in Chicago Illinois, USA as of August 2020. Accession number is PP46053. They have quite an extensive collection of Mazon Creek fossils at the exhibit.

The Field Museum produced a visual PDF of some of the fossils found at Mazon Creek. It can be found at this link:

https://fieldguides.fieldmuseum.org/sites/default/files/rapid-color-guides-pdfs/534_usa-age_fossils.pdf