Stratigraphy

Start Depth
End Depth
Stratigraphic Unit
Start Depth: 0.00 ft
End Depth: 15.00 ft
Unit: Quaternary 
System
Quaternary 
Series
 
Group
 
Formation
 
Member
 
Submember
 
Start Depth
0.00 ft
End Depth
15.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Soil Or Fill 
Percent
100 
Secondary Lithology
 
Percent
Tertiary Lithology
 
Percent
Comments
Start Depth: 15.00 ft
End Depth: 95.00 ft
Unit: Hopkinton 
System
Silurian 
Series
 
Group
 
Formation
Hopkinton 
Member
 
Submember
 
Start Depth
15.00 ft
End Depth
95.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Bedrock Surface - Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
85 
Secondary Lithology
Chert/Chalcedony 
Percent
10 
Tertiary Lithology
Shale 
Percent
Comments
Start Depth: 95.00 ft
End Depth: 155.00 ft
Unit: Blanding 
System
Silurian 
Series
 
Group
 
Formation
Blanding 
Member
 
Submember
 
Start Depth
95.00 ft
End Depth
155.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
70 
Secondary Lithology
Chert/Chalcedony 
Percent
40 
Tertiary Lithology
 
Percent
Comments
Start Depth: 155.00 ft
End Depth: 167.00 ft
Unit: Tete Des Morts/Mosalem Undiff. 
System
Silurian 
Series
 
Group
 
Formation
Tete Des Morts/Mosalem Undiff. 
Member
 
Submember
 
Start Depth
155.00 ft
End Depth
167.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Dolomite 
Percent
85 
Secondary Lithology
Shale 
Percent
10 
Tertiary Lithology
Chert/Chalcedony 
Percent
Comments
Start Depth: 167.00 ft
End Depth: 325.00 ft
Unit: Brainard Shale 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Brainard Shale 
Submember
 
Start Depth
167.00 ft
End Depth
325.00 ft
Contact Accuracy
Top & Base Accurate For Sample 
Penetration
Complete Penetration, No Gaps 
Primary Lithology
Shale 
Percent
80 
Secondary Lithology
Dolomite 
Percent
20 
Tertiary Lithology
 
Percent
Comments
Start Depth: 325.00 ft
End Depth: 380.00 ft
Unit: Elgin Limestone 
System
Ordovician 
Series
 
Group
 
Formation
Maquoketa 
Member
Elgin Limestone 
Submember
 
Start Depth
325.00 ft
End Depth
380.00 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: 380.00 ft
End Depth: 540.00 ft
Unit: Galena 
System
Ordovician 
Series
 
Group
Galena 
Formation
 
Member
 
Submember
 
Start Depth
380.00 ft
End Depth
540.00 ft
Contact Accuracy
Top Accurate, Base Less Accurate - (Indistinct Lithologic Break) 
Penetration
Partial Penetration (Base Not Met), No Gap At Top 
Primary Lithology
Dolomite 
Percent
95 
Secondary Lithology
Chert/Chalcedony 
Percent
Tertiary Lithology
 
Percent
Comments