Appalachian sedimentary cycles during the Pennsylvanian: Changing influences of sea level, climate, and tectonics

Did the Middlesboro, Kentucky, bolide impact event influence coal rank?

“…At that rate it would take 11.4 million years to reach 4-km burial depth, which would be latest Pennsylvanian to earliest Permian. Greb et al (2004Greb et al ( , 2008 show a gradual decrease in accommodation from the lower to upper Pennsylvanian in the central Appalachian basin, so that the subsidence rate is likely lower than estimated. For example, Outerbridge and Lyons (2006) estimated the ages of the Magoffin and Stoney Fork members of the Breathitt Group (Middle Pennsylvanian) based on linear extrapolations of the two absolute age dates, and calculated 2.7 million years for the interval between those two marine zones.…”

Paleoenvironmental analysis of the Glenalum Tunnel coal and roof rock, southern West Virginia—Implications for sulfur origin and trends

“…Eccentricity-driven climate and glacioeustatic sea level cycles exerted a significant control on sedimentation. Basinwide variations in the thickness, lateral continuity, and constituent facies of coal-bearing cycles were strongly influenced by changing rates of tectonic accommodation, sediment flux, and paleoclimate (Greb et al, 2008).…”

Examining Local Climate Variability in the Late Pennsylvanian Through Paleosols: An Example from the Lower Conemaugh Group of Southeastern Ohio, USA

“…Red and green paleosols are common within the Glenshaw Formation at the base of the transgressive and regressive sequences and are typically distinct due to their easily weathered appearance [2,5,12,23]. A recent study by Hembree and Nadon [5] found that paleosols of the Glenshaw Formation within southeastern Ohio consists of red to green blocky vertic Calcisols interpreted as Vertisols.…”

“…The Appalachian basin is a foreland basin that formed in response to thrusting and sedimentation during multiple orogenic events including the Acadian, Taconic, and the Alleghenian orogenies [12]. The Appalachian basin during the Middle to Late Pennsylvanian was located in the tropics at a paleolatitude of approximately 5-10° S [13][14][15].…”