Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 13.00 ft
Unit: Aurora 
System
Quaternary 
Series
Pleistocene Series 
Group
Pre-Illinoian 
Formation
Wolf Creek 
Member
Aurora 
Submember
 
Start Depth
0.00 ft
End Depth
13.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till - Oxidized And Leached 
Percent
85 
Secondary Lithology
Sand 
Percent
15 
Tertiary Lithology
 
Percent
Comments
Start Depth: 13.00 ft
End Depth: 15.00 ft
Unit: Winthrop 
System
Quaternary 
Series
Pleistocene Series 
Group
Pre-Illinoian 
Formation
Wolf Creek 
Member
Winthrop 
Submember
 
Start Depth
13.00 ft
End Depth
15.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till - Oxidized And Unleached 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 15.00 ft
End Depth: 32.00 ft
Unit: Pre-Illinoian 
System
Quaternary 
Series
Pleistocene Series 
Group
Pre-Illinoian 
Formation
 
Member
 
Submember
 
Start Depth
15.00 ft
End Depth
32.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sand And Gravel 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 32.00 ft
End Depth: 36.00 ft
Unit: Alburnett 
System
Quaternary 
Series
Pleistocene Series 
Group
Pre-Illinoian 
Formation
Alburnett 
Member
 
Submember
 
Start Depth
32.00 ft
End Depth
36.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till - Reduced And Unleached 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 36.00 ft
End Depth: 103.00 ft
Unit: Alburnett 
System
Quaternary 
Series
Pleistocene Series 
Group
Pre-Illinoian 
Formation
Alburnett 
Member
 
Submember
 
Start Depth
36.00 ft
End Depth
103.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till - Unoxidized And Unleached 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 103.00 ft
End Depth: 138.00 ft
Unit: Pre-Illinoian 
System
Quaternary 
Series
Pleistocene Series 
Group
Pre-Illinoian 
Formation
 
Member
 
Submember
 
Start Depth
103.00 ft
End Depth
138.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sand And Gravel 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 138.00 ft
End Depth: 145.00 ft
Unit: Wapsipinicon 
System
Devonian 
Series
 
Group
Wapsipinicon 
Formation
 
Member
 
Submember
 
Start Depth
138.00 ft
End Depth
145.00 ft
Contact Accuracy
Contacts From Driller's Log - Accurate 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Limestone 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments