Stratigraphy

 

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 30.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
30.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Silt 
Percent
90 
Secondary Lithology
Clay 
Percent
10 
Tertiary Lithology
 
Percent
Comments
Start Depth: 30.00 ft
End Depth: 215.00 ft
Unit: Silurian 
System
Silurian 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
30.00 ft
End Depth
215.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
80 
Secondary Lithology
Chert/Chalcedony 
Percent
20 
Tertiary Lithology
 
Percent
Comments
Start Depth: 215.00 ft
End Depth: 300.00 ft
Unit: Maquoketa 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
 
Submember
 
Start Depth
215.00 ft
End Depth
300.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
80 
Secondary Lithology
Shale 
Percent
20 
Tertiary Lithology
 
Percent
Comments
Start Depth: 300.00 ft
End Depth: 385.00 ft
Unit: Elgin Limestone 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Elgin Limestone 
Submember
 
Start Depth
300.00 ft
End Depth
385.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
90 
Secondary Lithology
Shale 
Percent
10 
Tertiary Lithology
 
Percent
Comments
Start Depth: 385.00 ft
End Depth: 490.00 ft
Unit: Galena 
System
Ordovician 
Series
 
Group
Galena 
Formation
 
Member
 
Submember
 
Start Depth
385.00 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
Tertiary Lithology
 
Percent
Comments
Start Depth: 490.00 ft
End Depth: 605.00 ft
Unit: Dunleith 
System
Ordovician 
Series
 
Group
Galena 
Formation
Dunleith 
Member
 
Submember
 
Start Depth
490.00 ft
End Depth
605.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
99 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 605.00 ft
End Depth: 675.00 ft
Unit: Decorah 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah 
Member
 
Submember
 
Start Depth
605.00 ft
End Depth
675.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
60 
Secondary Lithology
Dolomite 
Percent
35 
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 675.00 ft
End Depth: 715.00 ft
Unit: Platteville 
System
Ordovician 
Series
 
Group
Galena 
Formation
Platteville 
Member
 
Submember
 
Start Depth
675.00 ft
End Depth
715.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Base 
Primary Lithology
Dolomite 
Percent
75 
Secondary Lithology
Shale 
Percent
20 
Tertiary Lithology
Limestone 
Percent
Comments
Start Depth: 715.00 ft
End Depth: 738.00 ft
Unit: St. Peter Sandstone 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
 
Submember
 
Start Depth
715.00 ft
End Depth
738.00 ft
Contact Accuracy
Top And Base Inaccurate - (Poor Samples, Contact Gap, Indistinct Lithologic Break) 
Penetration
Complete Penetration, Gaps At Top & Base 
Primary Lithology
Sandstone 
Percent
50 
Secondary Lithology
Shale 
Percent
30 
Tertiary Lithology
Chert/Chalcedony 
Percent
20 
Comments
Start Depth: 738.00 ft
End Depth: 925.00 ft
Unit: Shakopee 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Shakopee 
Member
 
Submember
 
Start Depth
738.00 ft
End Depth
925.00 ft
Contact Accuracy
Base Accurate, Top Less Accurate - (Poor Samples, Gap At Contact) 
Penetration
Complete Penetration, Gap At Top 
Primary Lithology
Dolomite 
Percent
85 
Secondary Lithology
Shale 
Percent
10 
Tertiary Lithology
Sandstone 
Percent
Comments
Start Depth: 925.00 ft
End Depth: 976.00 ft
Unit: Oneota 
System
Ordovician 
Series
 
Group
Prairie Du Chien 
Formation
Oneota 
Member
 
Submember
 
Start Depth
925.00 ft
End Depth
976.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Dolomite 
Percent
45 
Secondary Lithology
Chert/Chalcedony 
Percent
45 
Tertiary Lithology
Shale 
Percent
10 
Comments