Winslow Formation

The Winslow Formation was a geologic formation in Arkansas, now abandoned and replaced by the Atoka Formation, the Hartshorne Formation, and the lower McAlester Formation (previously Spadra Shale^[2]).^[3][4] It preserves fossils dating back to the Carboniferous period.

Winslow Formation
Stratigraphic range: Carboniferous: Pennsylvanian
Type	Formation
Location
Region	Arkansas
Country	United States
Type section
Named for	Winslow, Washington County, Arkansas
Named by	George Irving Adams and Edward Oscar Ulrich[1]

See also

• Earth sciences portal
• United States portal
• Paleontology portal

• List of fossiliferous stratigraphic units in Arkansas
• Paleontology in Arkansas