Stratigraphy

 

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 37.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
37.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Silt 
Percent
85 
Secondary Lithology
Till 
Percent
15 
Tertiary Lithology
 
Percent
Comments
Start Depth: 37.00 ft
End Depth: 270.00 ft
Unit: Silurian 
System
Silurian 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
37.00 ft
End Depth
270.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Base 
Primary Lithology
Dolomite 
Percent
90 
Secondary Lithology
Chert/Chalcedony 
Percent
10 
Tertiary Lithology
 
Percent
Comments
Start Depth: 270.00 ft
End Depth: 480.00 ft
Unit: Maquoketa 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
 
Submember
 
Start Depth
270.00 ft
End Depth
480.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Top 
Primary Lithology
Dolomite 
Percent
60 
Secondary Lithology
Shale 
Percent
40 
Tertiary Lithology
 
Percent
Comments
Start Depth: 480.00 ft
End Depth: 720.00 ft
Unit: Galena 
System
Ordovician 
Series
 
Group
Galena 
Formation
 
Member
 
Submember
 
Start Depth
480.00 ft
End Depth
720.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
60 
Secondary Lithology
Limestone 
Percent
38 
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 720.00 ft
End Depth: 807.00 ft
Unit: Decorah 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah 
Member
 
Submember
 
Start Depth
720.00 ft
End Depth
807.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
84 
Secondary Lithology
Shale 
Percent
Tertiary Lithology
Dolomite 
Percent
Comments
Start Depth: 807.00 ft
End Depth: 860.00 ft
Unit: Tonti 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
Tonti 
Submember
 
Start Depth
807.00 ft
End Depth
860.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Sandstone 
Percent
90 
Secondary Lithology
Dolomite 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 860.00 ft
End Depth: 975.00 ft
Unit: Shakopee 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
 
Submember
 
Start Depth
860.00 ft
End Depth
975.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
96 
Secondary Lithology
Sandstone 
Percent
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 975.00 ft
End Depth: 1175.00 ft
Unit: Oneota 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Oneota 
Member
 
Submember
 
Start Depth
975.00 ft
End Depth
1175.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
84 
Secondary Lithology
Chert/Chalcedony 
Percent
15 
Tertiary Lithology
Sandstone 
Percent
Comments
Start Depth: 1175.00 ft
End Depth: 1200.00 ft
Unit: Jordan 
System
Cambrian 
Series
 
Group
 
Formation
Jordan 
Member
 
Submember
 
Start Depth
1175.00 ft
End Depth
1200.00 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
Sandstone 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments