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Implications of paleobotany of Pennsylvanian-age coal of the central Appalachian Basin for climate and coal-bed development; with Suppl. Data 91-02

Richard B. Winston
Implications of paleobotany of Pennsylvanian-age coal of the central Appalachian Basin for climate and coal-bed development; with Suppl. Data 91-02
Geological Society of America Bulletin (December 1990) 102 (12): 1720-1726

Abstract

Lycopod abundance in coal is used to estimate climatic "wetness" during the Pennsylvanian period in the central Appalachian basin. Plants were identified from their anatomy using etched, polished coal rather than using permineralized peat, compressions/impressions, or palynology. The data indicate that two drier intervals occurred: one in the Westphalian B (middle of the Kanawha Formation), the other in the early Stephanian (Conemaugh Formation). Both drier intervals have been previously recognized in the Illinois basin, but only the second has been previously recognized in the Appalachian basinIn 9 of 18 localities, lycopod abundance decreases upward within coal beds, whereas at the other nine localities, no statistically significant trends in lycopod abundance were observed. An upward decrease in lycopod abundance is suggestive of coal that formed in the central region of a domed peat swamp, but peat-dome formation is not demonstrated. Within coal beds, pteridosperms are most abundant in samples which are split or contain abundant mineral matter.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 102
Serial Issue: 12
Title: Implications of paleobotany of Pennsylvanian-age coal of the central Appalachian Basin for climate and coal-bed development; with Suppl. Data 91-02
Author(s): Winston, Richard B.
Affiliation: Geol. Surv. Ala., Tuscaloosa, AL, United States
Pages: 1720-1726
Published: 199012
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 32
Accession Number: 1990-059811
Categories: StratigraphyPetrology of coal
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sects., sketch map
N36°34'60" - N39°28'00", W83°34'60" - W75°15'00"
N38°25'00" - N42°00'00", W84°49'60" - W80°31'60"
N37°15'00" - N40°40'00", W82°30'00" - W77°45'00"
N39°43'00" - N42°17'60", W80°31'60" - W74°40'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Update Code: 1990
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