Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 16.00 ft
Unit: Deforest 
System
Quaternary 
Series
Holocene Series 
Group
 
Formation
Deforest 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
16.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Silt 
Percent
Secondary Lithology
Soil Or Fill 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 16.00 ft
End Depth: 51.00 ft
Unit: Noah Creek 
System
Quaternary 
Series
Pleistocene Series 
Group
Wisconsinan Episode 
Formation
Noah Creek 
Member
 
Submember
 
Start Depth
16.00 ft
End Depth
51.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sand And Gravel 
Percent
100 
Secondary Lithology
Unknown 
Percent
Tertiary Lithology
Unknown 
Percent
Comments
Start Depth: 51.00 ft
End Depth: 81.00 ft
Unit: Noah Creek 
System
Quaternary 
Series
Pleistocene Series 
Group
Wisconsinan Episode 
Formation
Noah Creek 
Member
 
Submember
 
Start Depth
51.00 ft
End Depth
81.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Clay 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 81.00 ft
End Depth: 86.00 ft
Unit: Noah Creek 
System
Quaternary 
Series
Pleistocene Series 
Group
Wisconsinan Episode 
Formation
Noah Creek 
Member
 
Submember
 
Start Depth
81.00 ft
End Depth
86.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sand And Gravel 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 86.00 ft
End Depth: 111.00 ft
Unit: Noah Creek 
System
Quaternary 
Series
Pleistocene Series 
Group
Wisconsinan Episode 
Formation
Noah Creek 
Member
 
Submember
 
Start Depth
86.00 ft
End Depth
111.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Clay 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 111.00 ft
End Depth: 146.00 ft
Unit: Noah Creek 
System
Quaternary 
Series
Pleistocene Series 
Group
Wisconsinan Episode 
Formation
Noah Creek 
Member
 
Submember
 
Start Depth
111.00 ft
End Depth
146.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sand 
Percent
100 
Secondary Lithology
Unknown 
Percent
Tertiary Lithology
Unknown 
Percent
Comments
Start Depth: 146.00 ft
End Depth: 328.00 ft
Unit: Dakota 
System
Cretaceous 
Series
 
Group
Fort Benton ("Lower Colorado ") 
Formation
Dakota 
Member
 
Submember
 
Start Depth
146.00 ft
End Depth
328.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Bedrock Surface - Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Sandstone 
Percent
Secondary Lithology
Shale 
Percent
Tertiary Lithology
 
Percent
Comments