Precision correlation of Kansas Pennsylvanian cyclothems emphasizing wire-line logs and conodonts in a sequence stratigraphic framework

Conference · Fri Mar 01 00:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5528988

Lambert, L L; Heckel, P H ^[1]; Watney, W L; Stevenson, G M ^[2]; Barrick, J E; Boardman, II, D R ^[3]

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1. Univ. of Iowa, Iowa City (United States)
2. Kansas Geological Survey, Lawrence (United States)
3. Texas Tech Univ., Lubbock (United States)

The lithologic components and genetic interpretation of classic Pennsylvanian cyclothems have clear counterparts in sequence stratigraphy. Blocky mudstones (paleosols) and associated extensive subaerial exposure surfaces bound individual cyclothems and represent type-1 sequence boundaries. The 'middle limestones' represent flooding units that may be thin or absent, depending on the relative rate of marine inundation. Most 'core shales' correspond to condensed sections accumulated during maximum flooding and are persistent from the basin to the upper shelf. Dense well-control with occasional cores provides a means to apply sequence-stratigraphic analysis to thin cyclothemic strata, which are below the resolution of conventional seismic profiles. A lithostratigraphic framework can be established by correlating the 'core shales' using their distinctive gamma-ray log signature. Rapid conodont evolution has resulted in a characteristic fauna for most of these 'core shales,' thus providing biostratigraphic confirmation of the lithostratigraphic correlations. The wide spread nature of these maximum transgressive deposits extends the utility of the conodont indicators across dissimilar biofacies and lithofacies that would otherwise be difficult to correlate. Integration of wire-line log and conodont indicators across dissimilar biofacies and lithofacies that would otherwise be difficult to correlate. Integration of wire-line log and conodont data by core and outcrop study could lay the groundwork for biostratigraphic analysis of 'core shale' cuttings obtained during drilling.

• OSTI ID: 5528988
• Report Number(s): CONF-910403-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
KANSAS
SEDIMENTARY BASINS
PALEONTOLOGY
STRATIGRAPHY
ANNELIDS
CARBONIFEROUS PERIOD
CORRELATIONS
DRILL CORES
EXPLORATORY WELLS
GAMMA LOGGING
LIMESTONE
LITHOLOGY
ANIMALS
CARBONATE ROCKS
DEVELOPED COUNTRIES
FEDERAL REGION VII
GEOLOGIC AGES
GEOLOGIC STRUCTURES
GEOLOGY
INVERTEBRATES
NORTH AMERICA
PALEOZOIC ERA
RADIOACTIVITY LOGGING
ROCKS
SEDIMENTARY ROCKS
USA
WELL LOGGING
WELLS
580000* - Geosciences