OBJECTID |
MapUnit |
Name |
FullName |
Age |
Description |
HierarchyKey |
ParagraphStyle |
Label |
Symbol |
AreaFillRGB |
AreaFillPatternDescription |
DescriptionSourceID |
GeoMaterial |
GeoMaterialConfidence |
_ID |
39 |
--- |
Pennsylvanian |
Pennsylvanian |
Pennsylvanian |
Pennsylvanian |
1 |
Heading1 |
--- |
--- |
--- |
--- |
DAS1 |
--- |
--- |
DMU01 |
40 |
Pm |
Mansfield Formation |
Mansfield Formation of the Raccoon Creek Group |
Pennsylvanian |
Sandstone and shale with minor amounts of coal, underclay, and ironstone. The Mansfield Formation is the lowest formation in the Raccoon Creek Group, which consists of, in descending order, the Staunton, Brazil, and Mansfield Formations. The base of the Mansfield is a regional diachronous unconformity that includes networks of southwestward-trending paleovalleys with relief in excess of 100 feet. The Mansfield rests on the West Baden and Blue River Groups in the southwestern part of the map area and rocks of the Sanders and Borden Groups in the northwestern part of the map area. The full thickness of the Mansfield is not present in map area. |
1-1 |
Normal |
Pm |
--- |
104,160,201 |
--- |
DAS1 |
Sandstone and mudstone |
Medium |
DMU02 |
41 |
--- |
Mississippian |
Mississippian |
Mississippian |
Mississippian |
2 |
Heading1 |
--- |
--- |
--- |
--- |
DAS1 |
--- |
--- |
DMU03 |
42 |
Mwb |
West Baden Group |
West Baden Group |
Mississippian |
Shale, sandstone, and limestone. The West Baden Group consists of five thin formations, in descending order these are the Elwren Formation, thin-bedded sandstones; Reelsville Limestone, thin-bedded gray micritic limestone; Sample Formation, shale; Beaver Bend Limestone, calcarenite; and Bethel Formation, shale and fine-grained sandstone. All West Baden formations are present in the map area but the full thickness of the group is not attained in the map area owing to erosion and the group's unconformable contact with the overlying Mansfield Formation. |
2-1 |
Normal |
Mwb |
--- |
104,104,201 |
--- |
DAS1 |
Mostly mudstone |
Medium |
DMU04 |
43 |
Mbr |
Blue River Group |
Blue River Group |
Mississippian |
Limestone, dolomite, and minor amounts of shale, calcareous sandstone, and chert. The Blue River Group consists of three formations, in descending order these are the Paoli Limestone, thin-bedded calcarenite and fine-grained limestone; Ste. Genevieve Limestone, calcarenite and calcareous sandstone; and St. Louis Limestone, fine-grained cherty limestones and dolomites. The Blue River thickens southwestward in the map area. Recorded thickness of the Blue River Group ranges from 156 to 234 feet and averages 199 feet in the map area. |
2-2 |
Normal |
Mbr |
--- |
202,205,210 |
--- |
DAS1 |
Carbonate rock |
Medium |
DMU05 |
44 |
Ms |
Sanders Group |
Sanders Group |
Mississippian |
Limestone, cherty limestone, dolomite, and impure carbonate. The Sanders Group consists of three formations, in descending order these are the Salem Limestone, massive and cross-bedded coarse-grained calcarenite; Harrodsburg Limestone, gray cherty calcarenite and fine-grained limestone; and Ramp Creek Formation, predominantly fine-grained cherty limestone and dolomite interbedded with shale. The Sanders thickens southwestward in the map area. Recorded thickness of the Sanders ranges from 76 to 175 feet and averages 126 feet In the map area. |
2-3 |
Normal |
Ms |
--- |
128,145,172 |
--- |
DAS1 |
Carbonate rock |
Medium |
DMU06 |
45 |
Mske |
Edwardsville and Spickert Knob Formations (Mississippian) undifferentiated |
Edwardsville and Spickert Knob Formations of the Borden Group |
Mississippian |
Thin-, medium-, and thick-bedded siltstone, shale and fine-grained sandstone with minor amounts of limestone. The Edwardsville and Spickert Knob Formations are the uppermost formations in the Borden Group, which consists of the Edwardsville Formation, Spickert Knob Formation, and New Providence Shale, in descending order. The Edwardsville is difficult to distinguish from the uppermost beds of the underlying Spickert Knob where the basal member of the Edwardsville, the Floyds Knob Limestone Member, is missing. Such is the case in much of the map area. For that reason the Edwardsville and Spickert Knob are mapped as an undifferentiated unit. Recorded thickness of the undifferentiated Edwardsville/Spickert Knob ranges from 521 to 643 feet and averages 585 feet in the map area. The base of the Spickert Knob is typically a sharp contact between porous sandstones or siltstones at the base of the Spickert Knob to the New Providence shale in the map area. The contact between the top of the Edwardsville and overlying Ramp Creek Limestone is gradational. |
2-4 |
Normal |
Mske |
--- |
153,174,195 |
--- |
DAS1 |
Clastic sedimentary rock |
Medium |
DMU07 |
46 |
Mnp |
New Providence Shale |
New Providence Shale of the Borden Group |
Mississippian |
Clay shale and silty shale. The New Providence Shale is the lowest formation in the Borden Group. The New Providence thins westward in the map area. Recorded thickness of the New Providence ranges from 23 to 227 feet and averages 142 feet in the map area. The contact between the New Providence and the overlying Spickert Knob Formation is typically an abrupt transition from shale to porous sandstone or siltstone in the map area. The contact between the New Providence and underlying Rockford Limestone or New Albany Shale typically is abrupt. |
2-5 |
Normal |
Mnp |
--- |
178,181,199 |
--- |
DAS1 |
Mostly mudstone |
Medium |
DMU08 |
47 |
--- |
Mississippian-Devonian |
Mississippian-Devonian |
Mississippian-Devonian |
Mississippian-Devonian |
3 |
Heading1 |
--- |
--- |
--- |
--- |
DAS1 |
--- |
--- |
DMU09 |
48 |
DMnar |
Rockford Limestone and New Albany Shale undifferentiated |
Rockford Limestone and New Albany Shale undifferentiated of the Muscatatuck Group |
Mississippian-Devonian |
Organic-rich shale and minor amounts of impure limestone. The Rockford Limestone is a thin, persistent, impure limestone that rests conformably on the New Albany Shale. The Rockford and New Albany are not differentiated because the Rockford, which is rarely more than 10 feet thick, is too thin to map as a separate unit. The New Albany consists of brownish-black, carbon-rich shale, greenish-gray shale, and minor amounts of carbonate and quartz sandstone. The New Albany is divided into six irregularly developed members, in descending order these are the Ellsworth, Clegg Creek, Camp Run, Morgan Trail, Selmier, and Blocher Members. The undifferentiated Rockford/New Albany is thickest in the south-central part of the map area. Recorded thickness of the undifferentiated Rockford/New Albany ranges from 97 to 155 feet and averages 127 feet thick in the map area. |
3-1 |
Normal |
DMnar |
--- |
126,124,185 |
--- |
DAS1 |
Mostly mudstone |
Medium |
DMU10 |
49 |
--- |
Devonian |
Devonian |
Devonian |
Devonian |
4 |
Heading1 |
--- |
--- |
--- |
--- |
DAS1 |
--- |
--- |
DMU11 |
50 |
Dm |
Muscatatuck Group |
Muscatatuck Group |
Devonian |
Limestone and dolomite. The Muscatatuck Group consists of two formations; these are, in descending order, the North Vernon Limestone and Jeffersonville Limestone. Muscatatuck formations were not mapped because they are thin and not well documented in the map area. Drillers' logs, especially older drillers' logs in the northeastern part of the map area refer to the Muscatatuck as the "Corniferous Limestone” and do not differentiate units within the Muscatatuck. The contact between the Muscatatuck and overlying New Albany Shale is an abrupt and possibly unconformable transition from limestone to black, organic-rich shale (Droste and Shaver, in Shaver and others, 1986, p. 99) that is well documented in drilling records in the map area. The contact between the Muscatatuck and underlying Silurian rocks is a diachronous regional unconformity. The Muscatatuck rests on the Wabash Formation throughout the map area. The Muscatatuck thickens southward in the map area. Recorded thickness of the Muscatatuck ranges from 86 to 155 feet end averages 115 feet thick in the map area. |
4-1 |
Normal |
Dm |
--- |
202,189,219 |
--- |
DAS1 |
Carbonate rock |
Medium |
DMU12 |
51 |
--- |
Silurian |
Silurian |
Silurian |
Silurian |
5 |
Heading1 |
--- |
--- |
--- |
--- |
DAS1 |
--- |
--- |
DMU13 |
52 |
Sw |
Wabash Formation |
Wabash Formation of the Bainbridge or Salina Group |
Silurian |
Limestone, dolomite, and argillaceous or silty dolomite. The Wabash Formation is subdivided into two irregularly developed named members; these are, in descending order, Liston Creek Limestone and Mississinewa Shale Members. The upper contact of the Wabash Formation is a regional unconformity between Devonian and Silurian rocks. The Wabash thickens westward in the map area. Recorded thickness of the Wabash Formation ranges from 16 to 210 feet and averages 89 feet in the map area. The contact between the Wabash Formation and underlying Pleasant Mills Formation is conformable and gradational. The gradation from the Mississinewa Shale Member of the Wabash Formation to the Louisville Limestone Member of the Pleasant Mills Formation is generally an interval of several feet. Wabash boundaries are extrapolations where reef facies replace the above-mentioned members. |
5-1 |
Normal |
Sw |
--- |
176,114,181 |
--- |
DAS1 |
Carbonate rock |
Medium |
DMU14 |
53 |
Spm |
Pleasant Mills Formation |
Pleasant Mills Formation of the Bainbridge of Salina Group |
Silurian |
Dolomite, limestone, and argillaceous dolomite. The Pleasant Mills Formation was proposed by Droste and Shaver (1982, p. 11– 17) to include, in descending order, the Louisville Limestone, Waldron Shale, and Limberlost Dolomite Members. It rarely is possible to differentiate the Limberlost Dolomite and underlying Salamonie Dolomite carbonates in the map area. The lithologic change that marks the base of the Waldron Shale Member of the Pleasant Mills Formation is distinct and commonly noted in drillers' logs and other geologic records from the map area; therefore, the Pleasant Mills Formation is herein restricted to the rocks from the top of the Louisville Limestone Member to the base of the Waldron Shale Member and the Limberlost Dolomite is assigned to the Salamonie Dolomite. Both the upper and lower contacts of the Pleasant Mills Formation, as herein defined, are conformable. The Pleasant Mills thickens northwestward in the map area. Recorded thickness of the Pleasant Mills ranges from 28 to 88 feet and averages 53 feet in the map area. Pleasant Mills boundaries are extrapolations where reef facies replace the above-mentioned members. |
5-2 |
Normal |
Spm |
--- |
222,199,225 |
--- |
DAS1 |
Carbonate rock |
Medium |
DMU15 |