Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 28.00 ft
Unit: Deforest 
System
Quaternary 
Series
Holocene Series 
Group
 
Formation
Deforest 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
28.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Alluvium 
Percent
Secondary Lithology
Silt 
Percent
Tertiary Lithology
Clay 
Percent
Comments
Start Depth: 28.00 ft
End Depth: 65.00 ft
Unit: Noah Creek 
System
Quaternary 
Series
Pleistocene Series 
Group
Wisconsinan Episode 
Formation
Noah Creek 
Member
 
Submember
 
Start Depth
28.00 ft
End Depth
65.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sand And Gravel 
Percent
95 
Secondary Lithology
Clay 
Percent
Tertiary Lithology
Unknown 
Percent
Comments
Start Depth: 65.00 ft
End Depth: 162.00 ft
Unit: Woodbury 
System
Cretaceous 
Series
 
Group
Fort Benton ("Lower Colorado ") 
Formation
Dakota 
Member
Woodbury 
Submember
 
Start Depth
65.00 ft
End Depth
162.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Bedrock Surface - Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
Secondary Lithology
Shale 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 162.00 ft
End Depth: 289.00 ft
Unit: Nishnabotna 
System
Cretaceous 
Series
 
Group
Fort Benton ("Lower Colorado ") 
Formation
Dakota 
Member
Nishnabotna 
Submember
 
Start Depth
162.00 ft
End Depth
289.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Sandstone 
Percent
Secondary Lithology
Shale 
Percent
Tertiary Lithology
 
Percent
Comments