Stratigraphy

 

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 95.00 ft
Unit: Pleistocene Series 
System
Quaternary 
Series
Pleistocene Series 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
95.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till 
Percent
85 
Secondary Lithology
Sand And Gravel 
Percent
15 
Tertiary Lithology
 
Percent
Comments
Start Depth: 95.00 ft
End Depth: 220.00 ft
Unit: Silurian 
System
Silurian 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
95.00 ft
End Depth
220.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Dolomite 
Percent
60 
Secondary Lithology
Chert/Chalcedony 
Percent
40 
Tertiary Lithology
 
Percent
Comments
Start Depth: 220.00 ft
End Depth: 462.00 ft
Unit: Maquoketa 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
 
Submember
 
Start Depth
220.00 ft
End Depth
462.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
80 
Secondary Lithology
Dolomite 
Percent
19 
Tertiary Lithology
Siltstone 
Percent
Comments
Start Depth: 462.00 ft
End Depth: 570.00 ft
Unit: Galena 
System
Ordovician 
Series
 
Group
Galena 
Formation
 
Member
 
Submember
 
Start Depth
462.00 ft
End Depth
570.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
75 
Secondary Lithology
Limestone 
Percent
25 
Tertiary Lithology
 
Percent
Comments
Start Depth: 570.00 ft
End Depth: 670.00 ft
Unit: Dunleith 
System
Ordovician 
Series
 
Group
Galena 
Formation
Dunleith 
Member
 
Submember
 
Start Depth
570.00 ft
End Depth
670.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
48 
Secondary Lithology
Limestone 
Percent
48 
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 670.00 ft
End Depth: 770.00 ft
Unit: Decorah/Platteville Undiff. 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah/Platteville Undiff. 
Member
 
Submember
 
Start Depth
670.00 ft
End Depth
770.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
80 
Secondary Lithology
Shale 
Percent
20 
Tertiary Lithology
 
Percent
Comments
Start Depth: 770.00 ft
End Depth: 775.00 ft
Unit: Glenwood 
System
Ordovician 
Series
 
Group
Ancell 
Formation
Glenwood 
Member
 
Submember
 
Start Depth
770.00 ft
End Depth
775.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
80 
Secondary Lithology
Limestone 
Percent
20 
Tertiary Lithology
 
Percent
Comments
Start Depth: 775.00 ft
End Depth: 825.00 ft
Unit: Tonti 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
Tonti 
Submember
 
Start Depth
775.00 ft
End Depth
825.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
80 
Secondary Lithology
Shale 
Percent
18 
Tertiary Lithology
Dolomite 
Percent
Comments
Start Depth: 825.00 ft
End Depth: 837.00 ft
Unit: Readstown 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
Readstown 
Submember
 
Start Depth
825.00 ft
End Depth
837.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Chert/Chalcedony 
Percent
60 
Secondary Lithology
Dolomite 
Percent
30 
Tertiary Lithology
Shale 
Percent
10 
Comments
Start Depth: 837.00 ft
End Depth: 927.00 ft
Unit: Willow River 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
Willow River 
Submember
 
Start Depth
837.00 ft
End Depth
927.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
90 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 927.00 ft
End Depth: 970.00 ft
Unit: New Richmond 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
New Richmond 
Submember
 
Start Depth
927.00 ft
End Depth
970.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Indistinct Lithologic Contact) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
70 
Secondary Lithology
Shale 
Percent
15 
Tertiary Lithology
Sandstone 
Percent
15 
Comments
Start Depth: 970.00 ft
End Depth: 1129.00 ft
Unit: Oneota 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Oneota 
Member
 
Submember
 
Start Depth
970.00 ft
End Depth
1129.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
80 
Secondary Lithology
Chert/Chalcedony 
Percent
17 
Tertiary Lithology
Sandstone 
Percent
Comments
Start Depth: 1129.00 ft
End Depth: 1137.00 ft
Unit: Coon Valley 
System
Cambrian 
Series
 
Group
 
Formation
Jordan 
Member
Coon Valley 
Submember
 
Start Depth
1129.00 ft
End Depth
1137.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Indistinct Lithologic Contact) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
95 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 1137.00 ft
End Depth: 1232.00 ft
Unit: Jordan 
System
Cambrian 
Series
 
Group
 
Formation
Jordan 
Member
 
Submember
 
Start Depth
1137.00 ft
End Depth
1232.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
75 
Secondary Lithology
Dolomite 
Percent
25 
Tertiary Lithology
 
Percent
Comments
Start Depth: 1232.00 ft
End Depth: 1270.00 ft
Unit: St. Lawrence 
System
Cambrian 
Series
 
Group
 
Formation
St. Lawrence 
Member
 
Submember
 
Start Depth
1232.00 ft
End Depth
1270.00 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
Dolomite 
Percent
98 
Secondary Lithology
Sandstone 
Percent
Tertiary Lithology
 
Percent
Comments