Buffalo Wallow Group

Buffalo Wallow Group
Stratigraphic range: Mississippian
Upper Chesterian
TypeGroup
Sub-units
UnderliesMansfield Formation
OverliesGlen Dean Limestone
Lithology
PrimaryShale
OtherSandstone, Limestone
Location
RegionIndiana, Kentucky
CountryUnited States
Type section
Named byButts (1917)

The Buffalo Wallow Group is a geologic group found in Indiana and Kentucky. It is equivalent to the Upper Pope Group as the two share some formations. However many of the formations in the Upper Pope pinch out and are not present in the Buffalo Wallow. The Buffalo Wallow is defined as the formations between the top of the Glen Dean Limestone up to the disconformity where it meets the Mansfield Limestone.[1][full citation needed]

Description

The Buffalo Wallow Group is made up of approximately 70% Shale including fissile shales, claystones, and siltstones. The remaining lithology is made up of mostly sandstone and limestone.[2]

Stratigraphy

The Buffalo Wallow Group contains mostly shale. It is bound on its top and base by limestone formations. The top is marked by an erosional disconformity

Tobinsport Formation

A formation in Illinois containing 4 members that are linked to other formations in the Upper Pope Group. The Negli Creek Limestone of the Kinkaid formation to the west. Mt. Pleasant Sandstone, Bristow Sandstone, and Siberia Limestone. The Siberia is a thin tongue of the Menard formation.[2]

Branchville Formation

The Branchville Formation is a geologic formation in Indiana. It has two limestone members, the Leopold Member and the Vienna Member.

Tar Springs Formation

This sandstone unit is 0-150' thick. The Tar Springs consists of interbedded sandstone and shale, creating closed reservoirs within the sand. For this reason it is the largest oil producing formation in Illinois. Estimated to have accounted for more than 60% of the oil production in the state.[citation needed]

References

  1. ^ Malott, C.A. (1954). "Variations in the Stratigraphic Position and Character of the Base of the Mansfield Sandstone in Southern Indiana". Indiana Academy of Science.
  2. ^ a b Henry H., Gray (1978). "Buffalo Wallow — Group Upper Chesterian (Mississippian) of southern Indiana" (PDF). Department of Natural Resources Geological Survey Occasional Paper. PAPER 25 – via INDIANIA UNIVERSITY.

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.