DOI: 10.1016/j.palaeo.2015.01.022
论文题名: What does Ophiomorpha irregulaire really look like?
作者: Leaman M. ; McIlroy D. ; Herringshaw L.G. ; Boyd C. ; Callow R.H.T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 439 起始页码: 38
结束页码: 49
语种: 英语
英文关键词: 3D morphology
; Neoichnology
; Ophiomorpha irregulaire
; Palaeobiology
; Palaeoenvironment
; Palaeogeography
英文摘要: Ophiomorpha irregulaire is a surprisingly poorly characterised ichnotaxon given its common occurrence in hydrocarbon reservoir facies. Current debate surrounds the ichnotaxobases suitable for ichnospecific-level identification and also the palaeogeographic distribution of the taxon. O. irregulaire is conventionally characterised in core by the presence of "spikey", fine-grained, wall-lining pellets, since the horizontal "meander maze" that is also part of the ichnospecific diagnosis cannot normally be demonstrated. To resolve ichnotaxonomic issues concerning the validity of pellet morphology as a primary ichnotaxobase, material from the type locality is re-described (Cretaceous Book Cliffs, Utah), with an emphasis on burrow wall morphology. Comparative neoichnological studies using the callianassid crustacean Neotrypaea californiensis were additionally conducted to understand the behaviour of modern taxa that produce burrows closely resembling O. irregulaire. High-resolution, three-dimensional morphological models were created from specimens of Ophiomorpha from the type locality of O. irregulaire in Utah, USA, and from Eocene deep marine turbidites of the Juncal Formation, California. Comparison of the morphological features from these two localities, as well as specimens observed in core from offshore Newfoundland, demonstrate conclusively that O. irregulaire is not restricted to the Cretaceous Western Interior Seaway. O. irregulaire may have a stratigraphic range from Jurassic to Recent, and occur in palaeoenvironmental settings ranging from shallow marine to continental slope settings. The flame-like pellet morphology is considered characteristic of the type material, and is a valid criterion for identifying O. irregulaire in core. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68775
Appears in Collections: 过去全球变化的重建
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作者单位: Memorial University of Newfoundland, Department of Earth Sciences, 300 Prince Philip Drive, St. John's, Newfoundland and Labrador, Canada; Durham University, Department of Earth Sciences, Durham, United Kingdom; School of Geosciences, University of Aberdeen, Aberdeen, United Kingdom; Statoil ASA, Svanholmen 8, Forus, Norway
Recommended Citation:
Leaman M.,McIlroy D.,Herringshaw L.G.,et al. What does Ophiomorpha irregulaire really look like?[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,439