Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 20.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
20.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Gumbotil 
Percent
Secondary Lithology
Till 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 20.00 ft
End Depth: 110.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
20.00 ft
End Depth
110.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till 
Percent
Secondary Lithology
Sand 
Percent
Tertiary Lithology
Gumbotil 
Percent
Comments
Start Depth: 110.00 ft
End Depth: 127.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
110.00 ft
End Depth
127.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Indistinct Lithologic Contact) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sand And Gravel 
Percent
Secondary Lithology
Till 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 127.00 ft
End Depth: 175.00 ft
Unit: Keokuk 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Augusta 
Formation
Keokuk 
Member
 
Submember
 
Start Depth
127.00 ft
End Depth
175.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Bedrock Surface - Complete Penetration, No Gaps 
Primary Lithology
Ls/Dol Mixed 
Percent
Secondary Lithology
Shale 
Percent
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 175.00 ft
End Depth: 275.00 ft
Unit: Burlington 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Augusta 
Formation
Burlington 
Member
 
Submember
 
Start Depth
175.00 ft
End Depth
275.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
Secondary Lithology
Limestone 
Percent
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 275.00 ft
End Depth: 285.00 ft
Unit: Wassonville 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
Sub-Augusta 
Formation
Maynes Creek 
Member
Wassonville 
Submember
 
Start Depth
275.00 ft
End Depth
285.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
Secondary Lithology
Limestone 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 290.00 ft
End Depth: 300.00 ft
Unit: Mccraney 
System
Mississippian (Subsystem Of Carboniferous System) 
Series
 
Group
North Hill 
Formation
Mccraney 
Member
 
Submember
 
Start Depth
290.00 ft
End Depth
300.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
Secondary Lithology
Siltstone 
Percent
Tertiary Lithology
Limestone 
Percent
Comments
Start Depth: 300.00 ft
End Depth: 320.00 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
320.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Indistinct Lithologic Contact) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Siltstone 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 320.00 ft
End Depth: 445.00 ft
Unit: Saverton 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Maple Mill 
Member
Saverton 
Submember
 
Start Depth
320.00 ft
End Depth
445.00 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: 445.00 ft
End Depth: 585.00 ft
Unit: Grassy Creek 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Maple Mill 
Member
Grassy Creek 
Submember
 
Start Depth
445.00 ft
End Depth
585.00 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: 585.00 ft
End Depth: 595.00 ft
Unit: Lime Creek 
System
Devonian 
Series
 
Group
Yellow Spring (New Albany) 
Formation
Lime Creek 
Member
 
Submember
 
Start Depth
585.00 ft
End Depth
595.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 595.00 ft
End Depth: 720.00 ft
Unit: Unknown 
System
Unknown 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
595.00 ft
End Depth
720.00 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: 720.00 ft
End Depth: 760.00 ft
Unit: Wapsipinicon 
System
Devonian 
Series
 
Group
Wapsipinicon 
Formation
 
Member
 
Submember
 
Start Depth
720.00 ft
End Depth
760.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
Dolomite 
Percent
Comments
Start Depth: 760.00 ft
End Depth: 780.00 ft
Unit: Maquoketa 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
 
Submember
 
Start Depth
760.00 ft
End Depth
780.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
Secondary Lithology
Dolomite 
Percent
Tertiary Lithology
Sandstone 
Percent
Comments
Start Depth: 780.00 ft
End Depth: 855.00 ft
Unit: Unknown 
System
Unknown 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
780.00 ft
End Depth
855.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
Secondary Lithology
Sandstone 
Percent
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 855.00 ft
End Depth: 980.00 ft
Unit: Dunleith 
System
Ordovician 
Series
 
Group
Galena 
Formation
Dunleith 
Member
 
Submember
 
Start Depth
855.00 ft
End Depth
980.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 980.00 ft
End Depth: 1035.00 ft
Unit: Decorah/Platteville Undiff. 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah/Platteville Undiff. 
Member
 
Submember
 
Start Depth
980.00 ft
End Depth
1035.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Indistinct Lithologic Contact) 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
Secondary Lithology
Sandstone 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 1035.00 ft
End Depth: 1105.00 ft
Unit: Starved Rock Sandstone 
System
Ordovician 
Series
 
Group
Ancell 
Formation
Glenwood 
Member
Starved Rock Sandstone 
Submember
 
Start Depth
1035.00 ft
End Depth
1105.00 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: 1105.00 ft
End Depth: 1118.00 ft
Unit: Harmony Hill 
System
Ordovician 
Series
 
Group
Ancell 
Formation
Glenwood 
Member
Harmony Hill 
Submember
 
Start Depth
1105.00 ft
End Depth
1118.00 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: 1118.00 ft
End Depth: 1160.00 ft
Unit: St. Peter Sandstone 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
 
Submember
 
Start Depth
1118.00 ft
End Depth
1160.00 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: 1160.00 ft
End Depth: 1168.00 ft
Unit: Willow River 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
Willow River 
Submember
 
Start Depth
1160.00 ft
End Depth
1168.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Chert/Chalcedony 
Percent
Secondary Lithology
Dolomite 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 1168.00 ft
End Depth: 1168.00 ft
Unit: Unknown 
System
Unknown 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
1168.00 ft
End Depth
1168.00 ft
Contact Accuracy
Unknown 
Penetration
Unknown 
Primary Lithology
Unknown 
Percent
Secondary Lithology
Unknown 
Percent
Tertiary Lithology
 
Percent
Comments