Stratigraphy

 

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 65.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
65.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Clay 
Percent
85 
Secondary Lithology
Till 
Percent
10 
Tertiary Lithology
Silt 
Percent
Comments
Start Depth: 65.00 ft
End Depth: 180.00 ft
Unit: Silurian 
System
Silurian 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
65.00 ft
End Depth
180.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
75 
Secondary Lithology
Chert/Chalcedony 
Percent
25 
Tertiary Lithology
 
Percent
Comments
Start Depth: 180.00 ft
End Depth: 275.00 ft
Unit: Maquoketa 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
 
Submember
 
Start Depth
180.00 ft
End Depth
275.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Shale 
Percent
90 
Secondary Lithology
Dolomite 
Percent
10 
Tertiary Lithology
Unknown 
Percent
Comments
Start Depth: 275.00 ft
End Depth: 345.00 ft
Unit: Elgin Limestone 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Elgin Limestone 
Submember
 
Start Depth
275.00 ft
End Depth
345.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Dolomite 
Percent
60 
Secondary Lithology
Shale 
Percent
40 
Tertiary Lithology
 
Percent
Comments
Start Depth: 345.00 ft
End Depth: 450.00 ft
Unit: Galena 
System
Ordovician 
Series
 
Group
Galena 
Formation
 
Member
 
Submember
 
Start Depth
345.00 ft
End Depth
450.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, Gaps, Top & Base Defined 
Primary Lithology
Dolomite 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 450.00 ft
End Depth: 590.00 ft
Unit: Dunleith 
System
Ordovician 
Series
 
Group
Galena 
Formation
Dunleith 
Member
 
Submember
 
Start Depth
450.00 ft
End Depth
590.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Limestone 
Percent
50 
Secondary Lithology
Dolomite 
Percent
25 
Tertiary Lithology
Chert/Chalcedony 
Percent
25 
Comments
Start Depth: 590.00 ft
End Depth: 657.00 ft
Unit: Decorah/Platteville Undiff. 
System
Ordovician 
Series
 
Group
Galena 
Formation
Decorah/Platteville Undiff. 
Member
 
Submember
 
Start Depth
590.00 ft
End Depth
657.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Bedrock Surface - Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
60 
Secondary Lithology
Limestone 
Percent
30 
Tertiary Lithology
Shale 
Percent
10 
Comments
Start Depth: 657.00 ft
End Depth: 660.00 ft
Unit: Harmony Hill 
System
Ordovician 
Series
 
Group
Ancell 
Formation
Glenwood 
Member
Harmony Hill 
Submember
 
Start Depth
657.00 ft
End Depth
660.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
70 
Secondary Lithology
Dolomite 
Percent
30 
Tertiary Lithology
 
Percent
Comments
Start Depth: 660.00 ft
End Depth: 701.00 ft
Unit: Tonti 
System
Ordovician 
Series
 
Group
Ancell 
Formation
St. Peter Sandstone 
Member
Tonti 
Submember
 
Start Depth
660.00 ft
End Depth
701.00 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
97 
Secondary Lithology
Dolomite 
Percent
Tertiary Lithology
Unknown 
Percent
Comments