About This Item
- Full text of this item is not available.
- Abstract PDFAbstract PDF(no subscription required)
Share This Item
The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
Volume:
Issue:
First Page:
Last Page:
Title:
Author(s):
Article Type:
Abstract:
Stratigraphic and petrologic relationships indicate that the Knifley Sandstone was the product of littoral to infralittoral processes, which deposited sands at the shoaling inner margins of a shallow, Early Mississippian sea.
The Knifley Sandstone is an elongate body, 30 mi long, 5 mi wide and up to 200 ft thick, within the Ft. Payne (=Borden) Formation (Lower Mississippian) of south-central Kentucky. This sandstone body trends northwest-southeast, parallel with the regional depositional strike. It is offlapped to the southwest by 2 elongate limestone bodies of similar dimension and orientation.
The thick widespread Ft. Payne (=Borden) Formation consists of bioturbated, siliceous dolosiltites. The Knifley Sandstone is a coarsening-upward sequence of fine- to medium-grained, glauconitic, dolomitic, subgraywackes, which grade downward into the underlying Ft. Payne (=Borden) dolosiltites. Extensive bioturbation
End_Page 344------------------------------
has destroyed most primary bedding features except the southwest-dipping master bedding. Dielectric anisotropy data indicate long-grain axis orientations toward the southwest, perpendicular to the length of the sandstone body and regional depositional strike. The 2 parallel limestone bodies consist almost entirely of coarse, well-sorted bryozoan-crinoidal biosparites. These limestones contain a minor percentage of terrigenous quartz; silicification of skeletal fossil debris is common. Directional properties in the 2 limestone bodies indicate a southwesterly transport direction.
The coarsening-upward sequence of highly bioturbated sandstone with an increase in carbonate downdip indicates a littoral to infralittoral barrier separating a gently shallowing sea on the southwest from its shoreline on the northeast.
End_of_Article - Last_Page 345------------