The Logan Formation was named by Andrews (1870) and originally described as a "buff-colored, fine-grained sandstone" above the Waverly Formation and below the Maxville Limestone. Bork and Malcuit (1979) concluded that the Logan Formation was deposited on a shallow marine shelf in a generally transgressing sea. The age of the Logan Formation has been established as early Osagean (Tn3) by the occurrences of brachiopods, ammonoids, conodonts and miospores (Clayton et al., 1998; Matchen and Kammer, 2006).
ReferencesEdit
Andrews, E.B. (1870). "Report of progress in the second district, Part II, IN Report of progress in 1869". Ohio Division of Geological Survey Report of Progress. 2nd Series: 1091–1094.
Bork, K.B.; Malcuit, R.J. (1979). "Paleoenvironments of the Cuyahoga and Logan Formations (Mississippian) of central Ohio". Geological Society of America Bulletin. 90: 89–113. doi:10.1130/0016-7606(1979)90<1091:potcal>2.0.co;2.
Clayton, G.; Manger, W.L.; Owens, B. (1998). "Mississippian (Lower Carboniferous) miospores from the Cuyahoga and Logan Formations of northeastern Ohio, USA". Journal of Micropalaeontology. 17: 183–191. doi:10.1144/jm.17.2.183.
Matchen, D.L.; Kammer, T.W. (2006). "Incised valley fill interpretation for Mississippian Black Hand Sandstone, Appalachian Basin, USA: Implications for glacial eustacy at Kinderhookian-Osagean (Tn2-Tn3) boundary". Sedimentary Geology. 191: 89–113. Bibcode:2006SedG..191...89M. doi:10.1016/j.sedgeo.2006.02.002.
Conglomerate in the Logan Formation exposed in Wooster, Ohio, USA.
Brachiopod internal and external molds in the Logan Formation in Wooster, Ohio.
logan, formation, name, given, lower, carboniferous, early, osagean, siltstone, sandstone, conglomeratic, unit, exposed, east, central, ohio, parts, western, west, virginia, stratigraphic, range, lower, carboniferous, early, osagean, preꞒ, exposed, wooster, oh. The Logan Formation is the name given to a Lower Carboniferous early Osagean siltstone sandstone and conglomeratic unit exposed in east central Ohio and parts of western West Virginia USA Logan FormationStratigraphic range Lower Carboniferous early Osagean PreꞒ Ꞓ O S D C P T J K Pg NLogan Formation exposed in Wooster Ohio TypeSedimentaryUnit ofWaverly GroupSub unitsBerne Byer Allenville VintonUnderliesMaxville Limestone Pottsville Group and Rushville ShaleOverliesCuyahoga Formation Black Hand SandstoneThickness0 to 40 mLithologyPrimarysandstone siltstone conglomerateOthershaleLocationRegionAppalachian BasinCountryUnited StatesExtentOhio West VirginiaType sectionNamed forLogan OhioNamed byAndrews 1870Stratigraphy and paleoenvironment EditThe Logan Formation was named by Andrews 1870 and originally described as a buff colored fine grained sandstone above the Waverly Formation and below the Maxville Limestone Bork and Malcuit 1979 concluded that the Logan Formation was deposited on a shallow marine shelf in a generally transgressing sea The age of the Logan Formation has been established as early Osagean Tn3 by the occurrences of brachiopods ammonoids conodonts and miospores Clayton et al 1998 Matchen and Kammer 2006 References EditAndrews E B 1870 Report of progress in the second district Part II IN Report of progress in 1869 Ohio Division of Geological Survey Report of Progress 2nd Series 1091 1094 Bork K B Malcuit R J 1979 Paleoenvironments of the Cuyahoga and Logan Formations Mississippian of central Ohio Geological Society of America Bulletin 90 89 113 doi 10 1130 0016 7606 1979 90 lt 1091 potcal gt 2 0 co 2 Clayton G Manger W L Owens B 1998 Mississippian Lower Carboniferous miospores from the Cuyahoga and Logan Formations of northeastern Ohio USA Journal of Micropalaeontology 17 183 191 doi 10 1144 jm 17 2 183 Matchen D L Kammer T W 2006 Incised valley fill interpretation for Mississippian Black Hand Sandstone Appalachian Basin USA Implications for glacial eustacy at Kinderhookian Osagean Tn2 Tn3 boundary Sedimentary Geology 191 89 113 Bibcode 2006SedG 191 89M doi 10 1016 j sedgeo 2006 02 002 nbsp Conglomerate in the Logan Formation exposed in Wooster Ohio USA nbsp Brachiopod internal and external molds in the Logan Formation in Wooster Ohio nbsp The bivalve Aviculopecten subcardiformis from the Logan Formation in Wooster Ohio external mold nbsp Bivalves Aviculopecten and brachiopods Syringothyris in the Logan Formation in Wooster Ohio nbsp Cross bedding and scour in the Logan Formation of Jackson County Ohio nbsp Schizodus medinaensis a bivalve from the Logan Formation in Wooster Ohio internal mold nbsp Syringothyris sp a spiriferinid brachiopod from the Logan Formation in Wooster Ohio internal mold nbsp Syringothyris external mold with borings Logan Formation Wooster Ohio nbsp Syringothyris texta Hall 1857 dorsal view internal mold Lower Carboniferous of Wooster Ohio nbsp Helminthopsis ichnosp a trace fossil from the Logan Formation in Wooster Ohio nbsp Crinoid calyx from the Logan Formation in Wooster Ohio with a conical platyceratid gastropod Palaeocapulus acutirostre attached nbsp This article about a specific stratigraphic formation in the United States is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Logan Formation amp oldid 1163316240, wikipedia, wiki, book, books, library,
