Geologic Systems, Sequences, and Plays
Upper Cretaceous System |
Upper Cretaceous | |
Play | Associated with... |
S. Williston Basin Margin - Niobrara Shallow Biogenic | Williston Basin |
Fractured Niobrara - Greater Silo/Dale Salt-Edge Oil | Denver Basin |
Fractured Niobrara - Greater Northern Denver Basin Oil | Denver Basin |
Niobrara Chalk - Shallow Biogenic Gas | Denver Basin |
Codell / Niobrara Oil and Gas | Denver Basin |
Pierre Shale Sandstones | Denver Basin |
Fractured Shale - Pierre | Denver Basin |