Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 8.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
8.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Base 
Primary Lithology
Sand And Gravel 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 8.00 ft
End Depth: 105.00 ft
Unit: Pleistocene Series 
System
Quaternary 
Series
Pleistocene Series 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
8.00 ft
End Depth
105.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Top 
Primary Lithology
Till 
Percent
94 
Secondary Lithology
Silt 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 105.00 ft
End Depth: 155.00 ft
Unit: Rapid 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Little Cedar 
Member
Rapid 
Submember
 
Start Depth
105.00 ft
End Depth
155.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
50 
Secondary Lithology
Dolomite 
Percent
50 
Tertiary Lithology
 
Percent
Comments
Start Depth: 155.00 ft
End Depth: 200.00 ft
Unit: Solon 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Little Cedar 
Member
Solon 
Submember
 
Start Depth
155.00 ft
End Depth
200.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
55 
Secondary Lithology
Dolomite 
Percent
45 
Tertiary Lithology
 
Percent
Comments
Start Depth: 200.00 ft
End Depth: 222.00 ft
Unit: Wapsipinicon 
System
Devonian 
Series
 
Group
Wapsipinicon 
Formation
 
Member
 
Submember
 
Start Depth
200.00 ft
End Depth
222.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, Gap At Base 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
calc.
Start Depth: 222.00 ft
End Depth: 295.00 ft
Unit: Silurian 
System
Silurian 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
222.00 ft
End Depth
295.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Top 
Primary Lithology
Dolomite 
Percent
99 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 295.00 ft
End Depth: 300.00 ft
Unit: Mosalem 
System
Silurian 
Series
 
Group
 
Formation
Mosalem 
Member
 
Submember
 
Start Depth
295.00 ft
End Depth
300.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
50 
Secondary Lithology
Dolomite 
Percent
50 
Tertiary Lithology
 
Percent
Comments
Start Depth: 300.00 ft
End Depth: 455.00 ft
Unit: Maquoketa 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
 
Submember
 
Start Depth
300.00 ft
End Depth
455.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Shale 
Percent
55 
Secondary Lithology
Dolomite 
Percent
45 
Tertiary Lithology
 
Percent
Comments
Start Depth: 455.00 ft
End Depth: 525.00 ft
Unit: Elgin Limestone 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Elgin Limestone 
Submember
 
Start Depth
455.00 ft
End Depth
525.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Shale 
Percent
60 
Secondary Lithology
Dolomite 
Percent
40 
Tertiary Lithology
 
Percent
Comments
Start Depth: 525.00 ft
End Depth: 750.00 ft
Unit: Galena 
System
Ordovician 
Series
 
Group
Galena 
Formation
 
Member
 
Submember
 
Start Depth
525.00 ft
End Depth
750.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Limestone 
Percent
70 
Secondary Lithology
Dolomite 
Percent
29 
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 750.00 ft
End Depth: 805.00 ft
Unit: Decorah/Platteville Undiff. 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah/Platteville Undiff. 
Member
 
Submember
 
Start Depth
750.00 ft
End Depth
805.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
90 
Secondary Lithology
Dolomite 
Percent
10 
Tertiary Lithology
 
Percent
Comments
Dol. is arg.
Start Depth: 805.00 ft
End Depth: 870.00 ft
Unit: Starved Rock Sandstone 
System
Ordovician 
Series
 
Group
Ancell 
Formation
Glenwood 
Member
Starved Rock Sandstone 
Submember
 
Start Depth
805.00 ft
End Depth
870.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Sandstone 
Percent
40 
Secondary Lithology
Limestone 
Percent
30 
Tertiary Lithology
Dolomite 
Percent
30 
Comments
Start Depth: 870.00 ft
End Depth: 890.00 ft
Unit: St. Peter Sandstone 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
 
Submember
 
Start Depth
870.00 ft
End Depth
890.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, Gap At Base 
Primary Lithology
Sandstone 
Percent
65 
Secondary Lithology
Limestone 
Percent
30 
Tertiary Lithology
Dolomite 
Percent
Comments
Start Depth: 890.00 ft
End Depth: 1160.00 ft
Unit: Shakopee 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
 
Submember
 
Start Depth
890.00 ft
End Depth
1160.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Top 
Primary Lithology
Dolomite 
Percent
98 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 1160.00 ft
End Depth: 1387.00 ft
Unit: Oneota 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Oneota 
Member
 
Submember
 
Start Depth
1160.00 ft
End Depth
1387.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Base 
Primary Lithology
Dolomite 
Percent
81 
Secondary Lithology
Chert/Chalcedony 
Percent
19 
Tertiary Lithology
 
Percent
Comments
Start Depth: 1387.00 ft
End Depth: 1455.00 ft
Unit: Jordan 
System
Cambrian 
Series
 
Group
 
Formation
Jordan 
Member
 
Submember
 
Start Depth
1387.00 ft
End Depth
1455.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Dolomite 
Percent
65 
Secondary Lithology
Sandstone 
Percent
34 
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 1455.00 ft
End Depth: 1470.00 ft
Unit: Unknown 
System
Unknown 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
1455.00 ft
End Depth
1470.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Gap 
Primary Lithology
 
Percent
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments