Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 30.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
30.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 30.00 ft
End Depth: 85.00 ft
Unit: St. Louis 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
 
Formation
St. Louis 
Member
 
Submember
 
Start Depth
30.00 ft
End Depth
85.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
40 
Secondary Lithology
Dolomite 
Percent
40 
Tertiary Lithology
Sandstone 
Percent
20 
Comments
Start Depth: 85.00 ft
End Depth: 105.00 ft
Unit: Warsaw 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Augusta 
Formation
Warsaw 
Member
 
Submember
 
Start Depth
85.00 ft
End Depth
105.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
50 
Secondary Lithology
Dolomite 
Percent
45 
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 105.00 ft
End Depth: 180.00 ft
Unit: Keokuk 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Augusta 
Formation
Keokuk 
Member
 
Submember
 
Start Depth
105.00 ft
End Depth
180.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
65 
Secondary Lithology
Shale 
Percent
20 
Tertiary Lithology
Chert/Chalcedony 
Percent
15 
Comments
Start Depth: 180.00 ft
End Depth: 250.00 ft
Unit: Burlington 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Augusta 
Formation
Burlington 
Member
 
Submember
 
Start Depth
180.00 ft
End Depth
250.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
43 
Secondary Lithology
Dolomite 
Percent
32 
Tertiary Lithology
Chert/Chalcedony 
Percent
25 
Comments
Start Depth: 250.00 ft
End Depth: 273.00 ft
Unit: Wassonville 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Sub-Augusta 
Formation
Maynes Creek 
Member
Wassonville 
Submember
 
Start Depth
250.00 ft
End Depth
273.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
50 
Secondary Lithology
Limestone 
Percent
40 
Tertiary Lithology
Shale 
Percent
10 
Comments
top; base picked by B. J. Bunker
Start Depth: 273.00 ft
End Depth: 300.00 ft
Unit: Prospect Hill 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
North Hill 
Formation
Prospect Hill 
Member
 
Submember
 
Start Depth
273.00 ft
End Depth
300.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Siltstone 
Percent
85 
Secondary Lithology
Shale 
Percent
10 
Tertiary Lithology
Limestone 
Percent
Comments
limestone likely cave in from Starrs Cave Member; McCraney Fm missing
Start Depth: 300.00 ft
End Depth: 325.00 ft
Unit: English River 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Maple Mill 
Member
English River 
Submember
 
Start Depth
300.00 ft
End Depth
325.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Siltstone 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 325.00 ft
End Depth: 375.00 ft
Unit: Saverton 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Maple Mill 
Member
Saverton 
Submember
 
Start Depth
325.00 ft
End Depth
375.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 375.00 ft
End Depth: 540.00 ft
Unit: Grassy Creek 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Maple Mill 
Member
Grassy Creek 
Submember
 
Start Depth
375.00 ft
End Depth
540.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 540.00 ft
End Depth: 582.00 ft
Unit: Lime Creek 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Lime Creek 
Member
 
Submember
 
Start Depth
540.00 ft
End Depth
582.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 582.00 ft
End Depth: 640.00 ft
Unit: Rapid 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Little Cedar 
Member
Rapid 
Submember
 
Start Depth
582.00 ft
End Depth
640.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 640.00 ft
End Depth: 715.00 ft
Unit: Solon 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Little Cedar 
Member
Solon 
Submember
 
Start Depth
640.00 ft
End Depth
715.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 715.00 ft
End Depth: 780.00 ft
Unit: Davenport 
System
Devonian 
Series
 
Group
Wapsipinicon 
Formation
Pinicon Ridge 
Member
Davenport 
Submember
 
Start Depth
715.00 ft
End Depth
780.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
50 
Secondary Lithology
Gypsum/Anhydrite 
Percent
45 
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 780.00 ft
End Depth: 800.00 ft
Unit: Spring Grove 
System
Devonian 
Series
 
Group
Wapsipinicon 
Formation
Pinicon Ridge 
Member
Spring Grove 
Submember
 
Start Depth
780.00 ft
End Depth
800.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
50 
Secondary Lithology
Gypsum/Anhydrite 
Percent
30 
Tertiary Lithology
Shale 
Percent
20 
Comments
Start Depth: 800.00 ft
End Depth: 850.00 ft
Unit: Kenwood 
System
Devonian 
Series
 
Group
Wapsipinicon 
Formation
Pinicon Ridge 
Member
Kenwood 
Submember
 
Start Depth
800.00 ft
End Depth
850.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
50 
Secondary Lithology
Ls/Dol Mixed 
Percent
40 
Tertiary Lithology
Gypsum/Anhydrite 
Percent
10 
Comments
Start Depth: 850.00 ft
End Depth: 935.00 ft
Unit: Wise Lake 
System
Ordovician 
Series
 
Group
Galena 
Formation
Wise Lake 
Member
 
Submember
 
Start Depth
850.00 ft
End Depth
935.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
98 
Secondary Lithology
Shale 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 935.00 ft
End Depth: 1055.00 ft
Unit: Dunleith 
System
Ordovician 
Series
 
Group
Galena 
Formation
Dunleith 
Member
 
Submember
 
Start Depth
935.00 ft
End Depth
1055.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
91 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 1055.00 ft
End Depth: 1150.00 ft
Unit: Decorah/Platteville/Glenwood Undiff. 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah/Platteville/Glenwood Undiff. 
Member
 
Submember
 
Start Depth
1055.00 ft
End Depth
1150.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
55 
Secondary Lithology
Shale 
Percent
40 
Tertiary Lithology
Sandstone 
Percent
Comments
Start Depth: 1150.00 ft
End Depth: 1180.00 ft
Unit: St. Peter Sandstone 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
 
Submember
 
Start Depth
1150.00 ft
End Depth
1180.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
50 
Secondary Lithology
Shale 
Percent
50 
Tertiary Lithology
 
Percent
Comments
shale may be cave in or St.Peter might actually be thinner than 30 ft
Start Depth: 1180.00 ft
End Depth: 1535.00 ft
Unit: Shakopee 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
 
Submember
 
Start Depth
1180.00 ft
End Depth
1535.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
80 
Secondary Lithology
Chert/Chalcedony 
Percent
15 
Tertiary Lithology
Sandstone 
Percent
Comments
Start Depth: 1535.00 ft
End Depth: 1765.00 ft
Unit: Oneota 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Oneota 
Member
 
Submember
 
Start Depth
1535.00 ft
End Depth
1765.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
70 
Secondary Lithology
Chert/Chalcedony 
Percent
30 
Tertiary Lithology
 
Percent
Comments
Start Depth: 1765.00 ft
End Depth: 1845.00 ft
Unit: Jordan 
System
Cambrian 
Series
 
Group
 
Formation
Jordan 
Member
 
Submember
 
Start Depth
1765.00 ft
End Depth
1845.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
50 
Secondary Lithology
Dolomite 
Percent
47 
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 1845.00 ft
End Depth: 1970.00 ft
Unit: St. Lawrence 
System
Cambrian 
Series
 
Group
 
Formation
St. Lawrence 
Member
 
Submember
 
Start Depth
1845.00 ft
End Depth
1970.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments