Ancient Fossil Ginko Leaves
Species - Ginko Adianroides
Age - 66 - 56 Million Years Old, Paleocene Period
Discovered - Morton Co. North Dakota, Sentinel Butte Formation
Measures 6' Wide
 
- Maidenhair tree 
Ginkgo biloba, commonly known as ginkgo or gingko, also known as the maidenhair tree, is the only living species in the division Ginkgophyta, all others being extinct. It is a member of a very old genus, with some fossils dating back 270 million years. 
 
- Sentinel Butte Formation 
The Sentinel Butte Formation is a geologic formation of the Paleocene age in the Williston Basin of western North Dakota. It preserves significant assemblages of non-marine plant and animal fossils.
 
- Paleocene Period 
The Paleocene, or Palaeocene, is a geological epoch that lasted from about 66 to 56 million years ago. It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The name is a combination of the Ancient Greek palæo- meaning "old" and the Eocene Epoch, translating to "the old part of the Eocene".