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GEOREF RECORD

The ichnofossil Halimedides in Cretaceous pelagic deposits from the Alps; environmental and ethological significance

Christian Gaillard and Davide Olivero
The ichnofossil Halimedides in Cretaceous pelagic deposits from the Alps; environmental and ethological significance
Palaios (April 2009) 24 (4): 257-270

Abstract

Numerous rhabdoglyphid trace fossils in Cretaceous pelagic limestones from the French and Swiss Alps are ascribed to the ichnogenus Halimedides Lorenz von Liburnau, 1902. The heart-shaped chambers, interpreted as storage chambers, are joined to tunnels in a linear pattern. The burrow system is classified as an agrichnium. Morphological characteristics of the burrows indicate that small infaunal crustaceans were the likely trace makers. Halimedides are deep-sea traces that indicate relatively firm media (substrates)--stiffground to firmground--based on paleoenvironmental and morphological evidence. The usual association of Halimedides with Rhizocorallium and Spongeliomorpha clearly place them in the Glossifungites ichnofacies. Halimedides may be an indicator of subtle gaps in sedimentation. Densely chambered Halimedides are interpreted to indicate lower oxygenation, whereas sparsely chambered burrows indicate higher oxygenation of bottom waters. Consequently, Halimedides may be a useful tool for interpreting water depth, media consistency, sedimentation rate, and seafloor oxygenation.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 24
Serial Issue: 4
Title: The ichnofossil Halimedides in Cretaceous pelagic deposits from the Alps; environmental and ethological significance
Affiliation: Universite Claude Bernard-Lyon I, Unite Mixte de Recherche Paleoenvironnements et Paleobiosphere, Lyon, France
Pages: 257-270
Published: 200904
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 64
Accession Number: 2009-038478
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., 1 table, geol. sketch map
N45°47'60" - N46°10'00", E09°04'60" - E09°22'60"
N44°04'60" - N44°31'00", E05°04'00" - E06°13'60"
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: 200921
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