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GEOREF RECORD

Sedimentology and taphonomy of the Early to Middle Devonian plant-bearing beds of the Trout Valley Formation, Maine

Jonathan P. Allen and Robert A. Gastaldo
Sedimentology and taphonomy of the Early to Middle Devonian plant-bearing beds of the Trout Valley Formation, Maine (in Wetlands through time, Stephen F. Greb (editor) and William A. DiMichele (editor))
Special Paper - Geological Society of America (2006) 399: 57-78

Abstract

The Trout Valley Formation of Emsian-Eifelian age in Baxter State Park, Maine, consists of fluvial and coastal deposits that preserve early land plants (embryophytes). Seven facies are recognized and represent deposits of main river channels (Facies 1, 2), flood basin (Facies 4), storm-influenced nearshore shelf bars (Facies 3), a paleosol (Facies 5), and tidal flats and channels (Facies 6, 7). The majority of plant assemblages are preserved in siltstones and are allochthonous and parautochthonous, with only one autochthonous assemblage identified in the sequence above an apparent paleosol horizon. Taphonomic analysis reveals that plant material within allocthonous assemblages is highly fragmented, poorly preserved, and decayed. Plant material within parautochthonous assemblages shows evidence of minimal transport, is well preserved, and shows signs of biologic response after burial. The one autochthonous assemblage contains small root traces. Trimerophytes (Psilophyton and Pertica quadrifaria), rhyniophytes (cf. Taeniocrada), and lycopods (Drepanophycus and Kaul-angiophyton) are the most common taxa in estuarine environments. Psilophyton taxa, Pertica, cf. Taeniocrada, and Drepanophycus are found also in fluvial settings. The presence of tidal influence in deposits where parautochthonous and autochthonous assemblages occur shows that these plants occupied coastal-estuarine areas. However, the effects on the growth and colonization of plants of the physical conditions (e.g., salinity) that exist in these settings in the Early to Middle Devonian are unknown.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 399
Title: Sedimentology and taphonomy of the Early to Middle Devonian plant-bearing beds of the Trout Valley Formation, Maine
Title: Wetlands through time
Author(s): Allen, Jonathan P.Gastaldo, Robert A.
Author(s): Greb, Stephen F.editor
Author(s): DiMichele, William A.editor
Affiliation: University of Nebraska, Department of Geosciences, Lincoln, NE, United States
Affiliation: University of Kentucky, Kentucky Geological Survey, Lexington, KY, United States
Pages: 57-78
Published: 2006
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 0-8137-2399-X
References: 80
Accession Number: 2006-069423
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 2 tables, sketch map
N45°30'00" - N46°30'00", W69°30'00" - W68°30'00"
Secondary Affiliation: Smithsonian Institution, USA, United StatesColby College, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200640
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