Pages authored by Nancy R. Hasenmueller:

1. Bedrock Geology / Karst in Indiana
   Karst is a distinctive type of landscape or topography that commonly occurs where carbonate strata (limestones and dolostones) are at the surface. Slightly acidic rainwater and water in the soil slowly percolate through fractures, dissolving the rock and creating sinkholes, caves, and many other features that characterize karst.
2. Rock Unit Names / Antrim Shale
   Type area and use of name in Indiana: The name Antrim Shale was suggested by A. C. Lane in 1901 for the shale unit, then called the St. Cleric, that was well exposed in Antrim County, Mich.
3. Rock Unit Names / New Albany Shale
   Type locality and synonyms: The name New Albany Black Slate was first used by Borden (1874, p. 158) in describing 104 feet (32 m) of well-exposed rocks along the Ohio River at New Albany, Floyd County, Ind.
4. Rock Unit Names / Staunton Formation
   Raccoon Creek Group,Type locality, history of name, and related nomenclature: The Staunton Formation was named by Cumings (1922, p. 525) for rocks exposed near Staunton, Clay County.
5. Geology / Bedrock Geology
   The principal bedrock units found in Marion County are composed of Paleozoic limestone, dolostone, siltstone, shale, and sandstone ranging from the Silurian to Mississippian age (Hasenmueller, 2003a, b). These rocks dip to the southwest at 10 to 20 ft per mile (3.0 to 6.1 m per 1.6 km), with the dip increasing from the northeast to southwest.
6. Geology / Bedrock Topography
   The bedrock surface in Marion County is composed of Paleozoic stratigraphic units ranging from Silurian to Mississippian age (Hasenmueller, 2003a, b) (fig. 1). These units are composed of shales, siltstones, sandstones, limestones, and dolostones.
7. Geology / Bedrock Geology
   The principal bedrock units found in Allen County are composed of Paleozoic limestone, dolomite, and shale ranging in age from the Silurian to Upper Devonian.
8. Geology / Bedrock Topography
   The bedrock surface, or topography, in Allen County is erosional in origin and the relief on the bedrock surface is approximately 200 ft.
9. Carbondale Group / Dugger Formation
   Type locality and use of name: The name Dugger Formation was used by Wier (1950 1952, p. 17) in describing rocks exposed in secs. 31 and 32, T. 8 N., R. 7 W., and secs. 5 and 6, T. 7 N., R. 7 W., 2 miles (3.2 km) northeast of Dugger, Sullivan County, Ind.
10. Dugger Formation / Bridge Junction Sandstone Member
    Type section: The name Bridge Junction Sandstone Member was first used by Friedman (in preparation) in describing a sandstone exposed at Bridge Junction in Coal Creek valley in the NE¼ sec. 29, T. 13 N., R. 9 W., 3 : miles (6.0 km) southwest of New Goshen, Vigo County, Ind.
11. Dugger Formation / Bucktown Coal Member
    Type locality and identification problem: The name Bucktown Coal Member (Dugger Formation) was proposed by Wier (1965) in an unpublished manuscript and was first published by Burger and Wier (1970), who also designated a type section in sec.
12. New Albany Shale / Camp Run Member
    Type section and description: The Camp Run Member of the New Albany Shale was named by Lineback (1968, 1970) for exposures of greenish- to olive-gray shale interbedded with brownish-black pyritic fissile shale along the south side of Indiana Highway 311 at the Interstate Highway 65 overpass west of Sellersburg, Clark County, Ind.
13. New Albany Shale / Clegg Creek Member
    Type section: The Clegg Creek Member of the New Albany Shale was named by Lineback (1968, 1970) for exposures along a road cut on Indiana Highway 160, 2 miles (3.2 km) southeast of Henryville, Clark County (N¼E¼ lot 240, Clark's Grant).
14. New Albany Shale / Morgan Trail Member
    Type section: The Morgan Trail Member of the New Albany Shale was named by Lineback (1968, 1970) for a roadside park 1 mile (1.6 km) southwest of the type section in the NW¼ sec.
15. Clegg Creek Member / Underwood Bed
    Type section and description: The Underwood was originally designated as a formation (Campbell, 1946) but was later assigned as a bed to the upper part of the Clegg Creek Member of the New Albany Shale (Lineback, 1968, 1970). The Underwood consists of 0.4 foot (0.1 m) of greenish-gray fossiliferous shale at the type section in the SE¼ sec.
16. Raccoon Creek Group / Brazil Formation
    Type locality and history of name: The Brazil Formation as originally named by Fuller and Ashley (1902, p. 2) for Brazil, Clay County, Ind., included the rocks in the interval between the top of the Mansfield Sandstone and the bottom of the Petersburg Coal (Springfield Coal Member of present usage).
17. Raccoon Creek Group / Mansfield Formation
    Type area and use of name: The Mansfield Formation was originally named the Mansfield Sandstone by Hopkins (1896, p. 199-200) for rocks exposed at Mansfield, Parke County, Ind.
18. Brazil Formation / Lower Block Coal Member
    Type locality and use of name: The term Lower Block Coal was first used formally by Ashley (1909, p. 57-58), who earlier (1899, p. 90, 103) had cited lower block coal as an informal usage.
19. Brazil Formation / Minshall Coal Member
    Type locality and use of name: The term Minshall Coal was first applied formally by Ashley (1909, p. 57) to the coalbed below the limestone at the now-abandoned mining town of Minshall, Parke County. In now-obsolete usage the name Minshall was also applied to the closely overlying limestone as well as other limestones.
20. Brazil Formation / Upper Block Coal Member
    Type locality and use of name: The name Upper Block Coal was first used formally by Ashley (1909, p. 57-58), who earlier (1899, p. 90, 103) had cited the term upper block coal as an informal usage.
21. Mansfield Formation / Blue Creek Coal Member
    Type section: The Blue Creek Coal Member, named by Gray, Jenkins, and Weidman (1960, p 25, 71, 72), consists of the coal mined extensively on Coal Mine Ridge at the headwaters of Blue Creek in southeastern Martin County and in northeastern Dubois County, Ind. The type section is in an abandoned strip mine in the SW¼NW¼ sec.
22. Mansfield Formation / French Lick Coal Member
    Type section and use of name: The name French Lick was first applied to an exposure of coal in a whetstone quarry said to be in the SW¼NW¼ sec. 4, T. 2 N., R. 2 W., near French Lick, Orange County, Ind. (Franklin, 1939, p. 9).
23. Mansfield Formation / Mariah Hill Coal Member
    Type locality and use of name: The name Upper Mariah Hill Coal was originally used for a coalbed mined by the Mariah Hill Super Block Coal Co. in secs. 19 and 20, T. 4 S., R. 4 W., one-quarter mile (0.4 km) southeast of Mariah Hill, Spencer County, Ind. (Franklin and Wanless, 1944, p. 87, 89).
24. Mansfield Formation / Shady Lane Coal Member
    Type section and use of name: The name Shady Lane was first applied by Hutchison (1960, p. 12) to the coal exposed in the stream valley in the SE¼ sec. 23, T. 13 N., R. 6 W., near Shady Lane on U.S. 40, Clay County, Ind.
25. Staunton Formation / Silverwood Limestone Member
    Type section and use of name: The name Silverwood was applied by Alexander (1943, p. 143) to a well-developed cyclothem and limestone exposed near Silverwood, Fountain County, Ind., about a quarter of a mile (0.4 km) north of Indiana 234 on the east side of Coal Creek. This exposure in the SE¼NW¼ sec.