Bluejacket to Weir-Pittsburg Interval

Isopachous map (in color scale) of net coal from the upper Krebs to lower Cabaniss Formations of the Cherokee Group (Dry Wood, BlueJacket series, and Weir-Pittsburg). The typical depositional sequence of the succession is based on cores and related log response. The net thickness of coal increases to the north and west due to greater accommodation. High sulfur and ash values (strongly pyritized coals) indicate both marine influence and influx of other sediment (either terrigenous or carbonate). Locally, peat growth in structural lows was negatively impacted by sediment influx making carbonaceous shales common lateral facies equivalents of coal that developed on structural highs where peat development was in mires protected from marine influence. Aerial extent, thickness and geometry of the Weir-Pittsburgh coal indicate a coastal depositional setting, yet thick and thin linear trends of coals of the BlueJacket series may indicate an alluvial origin, associated with incised valley fills.

Bluejacket to Weir Net Coal Isopach Map

 

 

 

 

http://www.kgs.ku.edu/PRS/AAPG2005/forestcity/p1-04.html

Last Modified August 2005