Related Records

1. Petrified Leaf in Shale - Slate

   Shale is a soft, brittle, fine-grained, and easily eroded sedimentary rock formed from mineral-rich silt, or mud, that was deposited in an aquatic environment, buried by other sediment, and compacted and cemented into hard rock. When exposed at the surface by erosion, shale weathers into thin layers called plates. This petrified leaf image in shale was found in Jefferson County Montana.

   Record Type: Object