MARCELLUS SHALE SUBSURFACE STRATIGRAPHY AND THICKNESS TRENDS: EASTERN NEW YORK TO NORTHEASTERN WEST VIRGINIA Gary G. Lash Terry Engelder Dept. of Geosciences Dept. of Geosciences SUNY-Fredonia The Pennsylvania State University…
Skaneateles Formation (Levanna Shale) Stafford Limestone Oatka Creek Shale Marcellus Shale (Mount Marion Fm; Berne Mbr) Marcellus Shale Cherry Valley Limestone type stratigraphy (Stony Hollow Mbr; Purcell Limestone)…
data distribution
general thickening to the east and southeast total Marcellus Shale isopach
Basal Contact GR Rho Stafford Limestone Oatka Creek Shale Onondaga Limestone Fredonia State College 1 Chautauqua Cty., NY
GR Rho Stafford Limestone Stoscheck 1 Chemung Cty., NY Oatka Creek Shale Cherry Valley Limestone Union Springs Shale Onondaga Limestone Needmore Shale Oriskany Ss.
Union Springs Shale isopach
Oatka Creek W Shale E Cherry Valley/Purcell Limestone UNION SPRINGS SHALE cross-section hung on the base of the Stafford Limestone or equivalent interval
Union Springs Shale isopach
Oatka Creek Shale W E Cherry Valley/Purcell Limestone UNION SPRINGS SHALE cross-section hung on the base of the Stafford Limestone or equivalent interval
Cherry Valley Limestone /Purcell Limestone isopach
W E CHERRY VALLEY/PURCELL LIMESTONE Union Springs Shale/Bakoven Shale cross-section hung on the base of the Oatka Creek Shale
Cherry Valley Limestone /Purcell Limestone isopach
W CHERRY VALLEY/PURCELL LIMESTONE E Union Springs Shale cross-section hung on the base of the Oatka Creek Shale
Cherry Valley Limestone /Purcell Limestone isopach
Oatka Creek Shale W E CHERRY VALLEY/PURCELL LIMESTONE Union Springs Shale cross-section hung on the base of the Stafford Limestone or equivalent interval
Cherry Valley Limestone /Purcell Limestone isopach
Oatka Creek W Shale E CHERRY VALLEY/PURCELL LIMESTONE Union Springs Shale cross-section hung on the base of the Oatka Creek Shale
Oatka Creek Shale isopach
OATKA CREEK SHALE W E Union Springs Shale cross-section hung on the base of the Stafford Limestone or equivalent interval
axis of erosion of the Union Springs Shale and Cherry Valley/Purcell Limestone Oatka Creek Shale isopach
Stafford Limestone W OATKA CREEK SHALE E thin Oatka Creek Shale Cherry Valley/Purcell Ls. locus of erosion of the Union Springs and Cherry Valley/Purcell succession Union Springs Shale is the thinning of the Oatka Creek…
Oatka Creek Shale isopach
W E Stafford Ls. OATKA CREEK SHALE Union Springs Shale cross-section hung on the top of the Stafford Limestone
Levanna Shale isopach
transgressive log signature LEVANNA SHALE W E Stafford Ls. Oatka Creek Shale Union Springs Shale Cherry Valley/Purcell Ls. cross-section hung on the top of the Levanna Shale
Levanna Shale isopach
transgressive log signature N LEVANNA SHALE S cross-section hung on the top of the Levanna Shale
Marcellus Shale a history of repeated erosional events
thrust load-induced subsidence from Ettensohn (1994)
2 Oatka Creek Shale 1 onset of Oatka Creek Union Springs(Id sedimentation Shale T-R Cycle) 2 T-R cycle Id Marcellus Purcell/Cherry Valley 1 T-R cycle Ic Shale eustatic control from Johnson et al., 1985
locus of erosion
T-R Cycle Ic onset of Tectophase II rising sea-level condensed or starved sequence thrust load-induced subsidence
development of a forebulge or tectonic welt accumulation of the Purcell/Cherry Valley Ls. over the eroded Union Springs Shale or (locally) the Onondaga Limestone thrust load-induced uplift
further forebulge-related uplift following accumulation of the Purcell/Cherry Valley Limestone T-R Cycle Id Oatka Creek Shale sedimentation rising sea-level thrust load-induced renewed subsidenceuplift ()
retrograde shift of the forebulge T-R Cycle Ie Levanna Shale sedimentation (transgressive to the northwest) rising sea-level erosion subsidence of the early Marcellus forebulge load-induced uplift prior to renewed widespread…