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GEOREF RECORD

Composite ichnofabrics; categorization based on number of ichnocoenoses and their temporal incongruence

Charles E. Savrda
Composite ichnofabrics; categorization based on number of ichnocoenoses and their temporal incongruence
Palaios (March 2016) 31 (3): 92-96

Abstract

Three general types of composite ichnofabric can be distinguished based on mechanisms responsible for trace-fossil overprinting, number of ichnocoenoses present, and relative timing of ichnocoenosis emplacement. Autocomposite ichnofabrics, which comprise a single ichnocoenosis, form by gradual upward migration of vertically partitioned benthic communities in pace with sedimentation; because they are presumed to reflect paleoenvironmental stasis, they are most useful in assessing aspects of benthic paleoecology (e.g., endobenthic tiering). Heterocomposite ichnofabrics comprise two or more ichnocoenoses produced in response to short- to long-term environmental perturbations within a depositional system; they reflect depositional process (e.g., event sedimentation) and longer-term paleoenvironmental dynamics. Ultracomposite ichnofabrics form by overprinting of ichnocoenoses that are significantly temporally disjunct and reflect bioturbation in disparate depositional systems. Although the latter ichnofabrics are comparatively rare, their recognition is vital for paleoichnologic studies, particularly those that target surface exposures upon which there may be a modern biogenic overprint.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 31
Serial Issue: 3
Title: Composite ichnofabrics; categorization based on number of ichnocoenoses and their temporal incongruence
Author(s): Savrda, Charles E.
Affiliation: Auburn University, Department of Geosciences, Auburn, AL, United States
Pages: 92-96
Published: 201603
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 19
Accession Number: 2016-090164
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N30°00'00" - N35°00'00", W88°30'00" - W85°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201644
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