Stratigraphy

 

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 28.00 ft
Unit: Pleistocene Series 
System
Quaternary 
Series
Pleistocene Series 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
28.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Till 
Percent
85 
Secondary Lithology
Dolomite 
Percent
15 
Tertiary Lithology
 
Percent
Comments
Start Depth: 28.00 ft
End Depth: 75.00 ft
Unit: Shell Rock 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Shell Rock 
Member
 
Submember
 
Start Depth
28.00 ft
End Depth
75.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
55 
Secondary Lithology
Limestone 
Percent
45 
Tertiary Lithology
 
Percent
Comments
Start Depth: 75.00 ft
End Depth: 200.00 ft
Unit: Lithograph City 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Lithograph City 
Member
 
Submember
 
Start Depth
75.00 ft
End Depth
200.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
80 
Secondary Lithology
Limestone 
Percent
19 
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 200.00 ft
End Depth: 270.00 ft
Unit: Coralville 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Coralville 
Member
 
Submember
 
Start Depth
200.00 ft
End Depth
270.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
75 
Secondary Lithology
Limestone 
Percent
25 
Tertiary Lithology
 
Percent
Comments
Start Depth: 270.00 ft
End Depth: 396.00 ft
Unit: Little Cedar 
System
Devonian 
Series
 
Group
Cedar Valley 
Formation
Little Cedar 
Member
 
Submember
 
Start Depth
270.00 ft
End Depth
396.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Dolomite 
Percent
96 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Dol contains emb Sd.