Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 685.00 ft
End Depth: 693.00 ft
Unit: Spechts Ferry 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah 
Member
Spechts Ferry 
Submember
 
Start Depth
685.00 ft
End Depth
693.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
75 
Secondary Lithology
Limestone 
Percent
25 
Tertiary Lithology
Unknown 
Percent
Comments
Start Depth: 693.00 ft
End Depth: 702.00 ft
Unit: Quimbys Mill 
System
Ordovician 
Series
 
Group
Galena 
Formation
Platteville 
Member
Quimbys Mill 
Submember
 
Start Depth
693.00 ft
End Depth
702.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 702.00 ft
End Depth: 736.00 ft
Unit: Mcgregor 
System
Ordovician 
Series
 
Group
Galena 
Formation
Platteville 
Member
Mcgregor 
Submember
 
Start Depth
702.00 ft
End Depth
736.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
Secondary Lithology
Dolomite 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 736.00 ft
End Depth: 750.00 ft
Unit: Pecatonica 
System
Ordovician 
Series
 
Group
Galena 
Formation
Platteville 
Member
Pecatonica 
Submember
 
Start Depth
736.00 ft
End Depth
750.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
Unknown 
Percent
Tertiary Lithology
Unknown 
Percent
Comments
Start Depth: 750.00 ft
End Depth: 758.00 ft
Unit: Glenwood 
System
Ordovician 
Series
 
Group
Ancell 
Formation
Glenwood 
Member
 
Submember
 
Start Depth
750.00 ft
End Depth
758.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
99 
Secondary Lithology
Sandstone 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 758.00 ft
End Depth: 1126.00 ft
Unit: Tonti 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
Tonti 
Submember
 
Start Depth
758.00 ft
End Depth
1126.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 1126.00 ft
End Depth: 1158.00 ft
Unit: Readstown 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
Readstown 
Submember
 
Start Depth
1126.00 ft
End Depth
1158.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
40 
Secondary Lithology
Sandstone 
Percent
35 
Tertiary Lithology
Chert/Chalcedony 
Percent
25 
Comments
Start Depth: 1158.00 ft
End Depth: 1161.00 ft
Unit: Oneota 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Oneota 
Member
 
Submember
 
Start Depth
1158.00 ft
End Depth
1161.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Dolomite 
Percent
95 
Secondary Lithology
Sandstone 
Percent
Tertiary Lithology
 
Percent
Comments