USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data > Geology > by state > Alabama

Midway Group; Naheola Formation

Naheola Formation - (Midway Group), The Naheola Formation is restricted to western AL and pinches out in western Butler County. Descriptions of the members of the formation follow in descending order. Coal Bluff Marl Member - glauconitic sand, thin-bedded silty clay, and sandy fossiliferous marl; Oak Hill Member - laminated silt, clay, and fine sand; contains a prominent bed of lignite near the top. The Coal Bluff Marl Member in Sumter County and in parts of Marengo County is mostly cross-bedded fine to coarse sand that is indistinguishable from the overlying lower beds of the Nanafalia Formation. Therefore, in these areas, the contact between the two is mapped at the top of the Oak Hill Member of the Naheola.
StateAlabama
NameMidway Group; Naheola Formation
Geologic agePaleocene
Original map labelTn
Primary rock typesand
Secondary rock typeclay or mud
Other rock typessilt; coal
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Sand (Bed)glauconitic sand
Unconsolidated > Fine-detrital > Clay (Bed)
Minor
Unconsolidated > Fine-detrital > Silt (Bed)
Incidental
Sedimentary > Coal > Lignite (Bed)
Unconsolidated > Marl (Bed)sandy fossiliferous marl
Map references
Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
Unit references
Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
Geographic coverageButler - Choctaw - Marengo - Monroe - Sumter - Wilcox

Show this information as [XML] - [JSON]

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoUSA.gov logoU.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ALPNn;1
Page Contact Information: Peter Schweitzer