Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 145.00 ft
Unit: Quaternary
System
Quaternary
Series
Group
Formation
Member
Submember
Start Depth
0.00 ft
End Depth
145.00 ft
Contact Accuracy
Top & Base Accurate For Sample
Penetration
Complete Gap
Primary Lithology
Percent
0
Secondary Lithology
Percent
0
Tertiary Lithology
Percent
0
Comments
Start Depth: 145.00 ft
End Depth: 380.00 ft
Unit: Pleistocene Series
System
Quaternary
Series
Pleistocene Series
Group
Formation
Member
Submember
Start Depth
145.00 ft
End Depth
380.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact)
Penetration
Complete Penetration, No Gaps
Primary Lithology
Till
Percent
0
Secondary Lithology
Percent
0
Tertiary Lithology
Percent
0
Comments
Start Depth: 380.00 ft
End Depth: 520.00 ft
Unit: Nishnabotna
System
Cretaceous
Series
Group
Fort Benton ("Lower Colorado ")
Formation
Dakota
Member
Nishnabotna
Submember
Start Depth
380.00 ft
End Depth
520.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break)
Penetration
Complete Gap
Primary Lithology
Percent
0
Secondary Lithology
Percent
0
Tertiary Lithology
Percent
0
Comments
contact based on nearby well data made by Bill Bunker
Start Depth: 520.00 ft
End Depth: 595.00 ft
Unit: Nishnabotna
System
Cretaceous
Series
Group
Fort Benton ("Lower Colorado ")
Formation
Dakota
Member
Nishnabotna
Submember
Start Depth
520.00 ft
End Depth
595.00 ft
Contact Accuracy
Top & Base Accurate For Sample
Penetration
Complete Penetration, Gap At Top
Primary Lithology
Shale
Percent
98
Secondary Lithology
Sandstone
Percent
2
Tertiary Lithology
Unknown
Percent
0
Comments
Start Depth: 595.00 ft
End Depth: 765.00 ft
Unit: Woodbury
System
Cretaceous
Series
Group
Fort Benton ("Lower Colorado ")
Formation
Dakota
Member
Woodbury
Submember
Start Depth
595.00 ft
End Depth
765.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact)
Penetration
Partial Penetration (Base Not Met), No Gap At Top
Primary Lithology
Sandstone
Percent
89
Secondary Lithology
Gravel
Percent
10
Tertiary Lithology
Coal
Percent
1
Comments