|Name||Undifferentiated Jurassic Sediments|
Sedimentary > Clastic > Mudstone > Shale (Bed)mainly nearshore marine sediments
Sedimentary > Carbonate > Limestone (Bed)local limestone; mainly nearshore marine sediments
|Stratigraphic units||Swift and Rierdon Formation equivalents|
North Dakota Geological Survey, 2001, Geologic Bedrock Map of North Dakota based on Bluemle, John P., 1983, Geologic and Topographic Bedrock Map of North Dakota, NDGS Miscellaneous Map 25, 1:670,000 scale.
|Counties||Pembina - Walsh|