Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 182.00 ft
Unit: Unknown 
System
Unknown 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
182.00 ft
Contact Accuracy
Unknown 
Penetration
Complete Gap 
Primary Lithology
 
Percent
0 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 182.00 ft
End Depth: 230.00 ft
Unit: Pleistocene Series 
System
Quaternary 
Series
Pleistocene Series 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
182.00 ft
End Depth
230.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Top 
Primary Lithology
Till 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 230.00 ft
End Depth: 255.00 ft
Unit: Keokuk 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Augusta 
Formation
Keokuk 
Member
 
Submember
 
Start Depth
230.00 ft
End Depth
255.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Bedrock Surface - Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 255.00 ft
End Depth: 333.00 ft
Unit: Burlington 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Augusta 
Formation
Burlington 
Member
 
Submember
 
Start Depth
255.00 ft
End Depth
333.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Limestone 
Percent
0 
Tertiary Lithology
Chert/Chalcedony 
Percent
0 
Comments
Start Depth: 333.00 ft
End Depth: 335.00 ft
Unit: Iowa Falls Dolomite 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Sub-Augusta 
Formation
Gilmore City 
Member
Iowa Falls Dolomite 
Submember
 
Start Depth
333.00 ft
End Depth
335.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 335.00 ft
End Depth: 370.00 ft
Unit: Eagle City 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Sub-Augusta 
Formation
Maynes Creek 
Member
Eagle City 
Submember
 
Start Depth
335.00 ft
End Depth
370.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
Chert/Chalcedony 
Percent
0 
Comments
Start Depth: 370.00 ft
End Depth: 380.00 ft
Unit: Maynes Creek 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Sub-Augusta 
Formation
Maynes Creek 
Member
 
Submember
 
Start Depth
370.00 ft
End Depth
380.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 380.00 ft
End Depth: 410.00 ft
Unit: Chapin 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
North Hill 
Formation
Chapin 
Member
 
Submember
 
Start Depth
380.00 ft
End Depth
410.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Limestone 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 410.00 ft
End Depth: 485.00 ft
Unit: Maple Mill 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Maple Mill 
Member
 
Submember
 
Start Depth
410.00 ft
End Depth
485.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 485.00 ft
End Depth: 490.00 ft
Unit: Aplington 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Aplington 
Member
 
Submember
 
Start Depth
485.00 ft
End Depth
490.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 490.00 ft
End Depth: 560.00 ft
Unit: Sheffield 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Sheffield 
Member
 
Submember
 
Start Depth
490.00 ft
End Depth
560.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 560.00 ft
End Depth: 690.00 ft
Unit: Lime Creek 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Lime Creek 
Member
 
Submember
 
Start Depth
560.00 ft
End Depth
690.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
Limestone 
Percent
0 
Comments
Start Depth: 690.00 ft
End Depth: 810.00 ft
Unit: Coralville 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Coralville 
Member
 
Submember
 
Start Depth
690.00 ft
End Depth
810.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
Shale 
Percent
0 
Comments
Start Depth: 810.00 ft
End Depth: 945.00 ft
Unit: Rapid 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Little Cedar 
Member
Rapid 
Submember
 
Start Depth
810.00 ft
End Depth
945.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
Gypsum/Anhydrite 
Percent
0 
Comments
Start Depth: 945.00 ft
End Depth: 994.00 ft
Unit: Solon 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Little Cedar 
Member
Solon 
Submember
 
Start Depth
945.00 ft
End Depth
994.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 994.00 ft
End Depth: 1042.00 ft
Unit: Kenwood 
System
Devonian 
Series
 
Group
Wapsipinicon 
Formation
Pinicon Ridge 
Member
Kenwood 
Submember
 
Start Depth
994.00 ft
End Depth
1042.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Gypsum/Anhydrite 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
Shale 
Percent
0 
Comments
Start Depth: 1042.00 ft
End Depth: 1165.00 ft
Unit: Laporte City 
System
Silurian 
Series
 
Group
 
Formation
Laporte City 
Member
 
Submember
 
Start Depth
1042.00 ft
End Depth
1165.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Chert/Chalcedony 
Percent
0 
Secondary Lithology
Limestone 
Percent
0 
Tertiary Lithology
Dolomite 
Percent
0 
Comments
Start Depth: 1165.00 ft
End Depth: 1190.00 ft
Unit: Silurian 
System
Silurian 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
1165.00 ft
End Depth
1190.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1190.00 ft
End Depth: 1310.00 ft
Unit: Brainard Shale 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Brainard Shale 
Submember
 
Start Depth
1190.00 ft
End Depth
1310.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1310.00 ft
End Depth: 1355.00 ft
Unit: Ft. Atkinson Limestone 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Ft. Atkinson Limestone 
Submember
 
Start Depth
1310.00 ft
End Depth
1355.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1355.00 ft
End Depth: 1400.00 ft
Unit: Elgin Limestone 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Elgin Limestone 
Submember
 
Start Depth
1355.00 ft
End Depth
1400.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1400.00 ft
End Depth: 1505.00 ft
Unit: Unknown 
System
Unknown 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
1400.00 ft
End Depth
1505.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1505.00 ft
End Depth: 1630.00 ft
Unit: Dunleith 
System
Ordovician 
Series
 
Group
Galena 
Formation
Dunleith 
Member
 
Submember
 
Start Depth
1505.00 ft
End Depth
1630.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1630.00 ft
End Depth: 1636.00 ft
Unit: Guttenberg 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah 
Member
Guttenberg 
Submember
 
Start Depth
1630.00 ft
End Depth
1636.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
0 
Secondary Lithology
Shale 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1636.00 ft
End Depth: 1643.00 ft
Unit: Spechts Ferry 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah 
Member
Spechts Ferry 
Submember
 
Start Depth
1636.00 ft
End Depth
1643.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
Limestone 
Percent
0 
Comments
Start Depth: 1643.00 ft
End Depth: 1688.00 ft
Unit: Mcgregor 
System
Ordovician 
Series
 
Group
Galena 
Formation
Platteville 
Member
Mcgregor 
Submember
 
Start Depth
1643.00 ft
End Depth
1688.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Limestone 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1688.00 ft
End Depth: 1693.00 ft
Unit: Harmony Hill 
System
Ordovician 
Series
 
Group
Ancell 
Formation
Glenwood 
Member
Harmony Hill 
Submember
 
Start Depth
1688.00 ft
End Depth
1693.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1693.00 ft
End Depth: 1727.00 ft
Unit: St. Peter Sandstone 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
 
Submember
 
Start Depth
1693.00 ft
End Depth
1727.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 1727.00 ft
End Depth: 1900.00 ft
Unit: Willow River 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
Willow River 
Submember
 
Start Depth
1727.00 ft
End Depth
1900.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
Sandstone 
Percent
0 
Comments
Start Depth: 1900.00 ft
End Depth: 1975.00 ft
Unit: New Richmond 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
New Richmond 
Submember
 
Start Depth
1900.00 ft
End Depth
1975.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Sandstone 
Percent
0 
Secondary Lithology
Dolomite 
Percent
0 
Tertiary Lithology
Chert/Chalcedony 
Percent
0 
Comments
Start Depth: 1975.00 ft
End Depth: 2194.00 ft
Unit: Oneota 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Oneota 
Member
 
Submember
 
Start Depth
1975.00 ft
End Depth
2194.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Chert/Chalcedony 
Percent
0 
Tertiary Lithology
Sandstone 
Percent
0 
Comments
Start Depth: 2194.00 ft
End Depth: 2247.00 ft
Unit: Jordan 
System
Cambrian 
Series
 
Group
 
Formation
Jordan 
Member
 
Submember
 
Start Depth
2194.00 ft
End Depth
2247.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 2247.00 ft
End Depth: 2508.00 ft
Unit: St. Lawrence 
System
Cambrian 
Series
 
Group
 
Formation
St. Lawrence 
Member
 
Submember
 
Start Depth
2247.00 ft
End Depth
2508.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
0 
Secondary Lithology
Sandstone 
Percent
0 
Tertiary Lithology
Shale 
Percent
0 
Comments
Start Depth: 2508.00 ft
End Depth: 2798.00 ft
Unit: Lone Rock 
System
Cambrian 
Series
 
Group
Tunnel City 
Formation
Lone Rock 
Member
 
Submember
 
Start Depth
2508.00 ft
End Depth
2798.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
0 
Secondary Lithology
Sandstone 
Percent
0 
Tertiary Lithology
Dolomite 
Percent
0 
Comments
Start Depth: 2798.00 ft
End Depth: 2865.00 ft
Unit: Eau Claire 
System
Cambrian 
Series
 
Group
Tunnel City 
Formation
Eau Claire 
Member
 
Submember
 
Start Depth
2798.00 ft
End Depth
2865.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 2865.00 ft
End Depth: 2955.00 ft
Unit: Mt. Simon 
System
Cambrian 
Series
 
Group
Tunnel City 
Formation
Mt. Simon 
Member
 
Submember
 
Start Depth
2865.00 ft
End Depth
2955.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments
Start Depth: 2955.00 ft
End Depth: 2970.00 ft
Unit: Unknown 
System
Unknown 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
2955.00 ft
End Depth
2970.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Quartzite 
Percent
100 
Secondary Lithology
 
Percent
0 
Tertiary Lithology
 
Percent
0 
Comments