scholarly journals Joint patterns in coal, black shale, gray shale and mudrock, and limestone and dolomite in the Appalachian Basin

1981 ◽  
Author(s):  
George Willis Colton ◽  
W.J. Perry ◽  
Jean D. MacKenzie
Keyword(s):  
Black Shale ◽  
Appalachian Basin

Description and paleoecology of a population ofAnthraconaiafrom the Pennsylvanian of southern Indiana

1989 ◽  
Vol 63 (4) ◽  
pp. 449-453
Author(s):  
Daniel D. Petzold
Keyword(s):  
Organic Carbon ◽  
Energy Level ◽  
Black Shale ◽  
Significant Variation ◽  
Energy Levels ◽  
Appalachian Basin ◽  
The Other ◽  
Stratigraphic Sequence ◽  
Depositional History ◽  
History Of

Anthraconaiasp. occurs in the thin nonmarine interval that lies between the Upper Millersburg Coal Member and the Lower Millersburg Coal Member (Pennsylvanian, Desmoinesian) in Warrick County, Indiana. Specimens ofAnthraconaiasp. resembleAnthraconaiathat occur in Pennsylvanian and Permian rocks of the Appalachian Basin, but they differ slightly in size, form ratios, or both. Specimens were found in massive, nonfissile gray mudstone; buff-colored, laminated limestone (ostracodal biomicrite, wackestone); and platy black shale. The only statistically significant variation between shells from these different lithologies is that shells recovered from the limestone tend to be more ovate than shells from the other two lithologies. This contradicts the findings of previous investigations in which more ovateAnthraconaiawere found in the more organic-rich sediments of a given stratigraphic sequence. This difference is probably caused by the lack of discernible change in energy level through the depositional history of the interval and suggests that changing energy levels may be more important to the control of the morphology ofAnthraconaiathan the level of organic carbon in the sediment.

Black shale deposition and faunal overturn in the Devonian Appalachian Basin: Clastic starvation, seasonal water-column mixing, and efficient biolimiting nutrient recycling

2000 ◽  
Vol 15 (3) ◽  
pp. 280-291 ◽  
Author(s):  
Adam E. Murphy ◽  
Bradley B. Sageman ◽  
David J. Hollander ◽  
Timothy W. Lyons ◽  
Carlton E. Brett
Keyword(s):  
Water Column ◽  
Black Shale ◽  
Nutrient Recycling ◽  
Appalachian Basin ◽  
Water Column Mixing
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