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Article: The sedimentary geology, palaeoenvironments and ichnocoenoses of the Lower Devonian Horlick Formation, Ohio Range, Antarctica

TitleThe sedimentary geology, palaeoenvironments and ichnocoenoses of the Lower Devonian Horlick Formation, Ohio Range, Antarctica
Authors
KeywordsBeacon Supergroup
Sedimentology
Trace fossils
Transantarctic Mountains
Issue Date2002
PublisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=ANS
Citation
Antarctic Science, 2002, v. 14 n. 4, p. 395-411 How to Cite?
AbstractSix ichnocoenoses in the clastic Devonian Horlick Formation (max. 56 m) confirm the nearshore marine character of eight of the nine lithofacies present. A basal sand sheet overlies a weathered granitic land surface (Kukri Erosion Surface) on Cambro - Ordovician granitoids. The level nature of this surface and the way it cuts across weathering profiles, suggests that the surface had been modified by marine processes prior to deposition. The basal sand sheet (Cross-bedded Sand sheet Lithofacies) contains tidal bundles, and at its top, abundant Monocraterion (Monocraterion Ichnocoenosis). The second sand sheet (Pleurothyrella Lithofacies) is heavily burrowed and shows alternating periods of sedimentation, burrowing, and erosion below wave base as the sea deepened (Catenarichnus Ichnocoenosis). With increasing transgression, finer sediments were deposited (Laminated Mudstone and Feldspathic lithofacies) in an unstable pattern of coarse sandbars and finer troughs (Cruziana-Rusophycus and Arenicolites ichnocoenoses) crossed by active longshore marine channels (Poorly-sorted Lithofacies, Spirophyton Ichnoocoenosis). Short-lived but powerful storms produced thin shelly tempestites (Shell-bed Lithofacies), whereas sporadic, very thin phosphate rich beds (Phosphatic Lithofacies) may have resulted from marine transgressions across the basin. The deepest water is probably represented by sediments of the Spirifer Lithofacies (Rosselia Ichnocoenosis). The Schulthess Lithofacies is regarded as fluvial, deposited in the lower reaches of a river draining a land area that lay towards Marie Byrd Land. Channels in the basal sand sheet indicate movement to the southwest, but orientation became more variable higher in the sequence. Four new measured sections are figured. The relationship of the Ohio Range to the rest of Antarctica during the Devonian is suggested.
Persistent Identifierhttp://hdl.handle.net/10722/42378
ISSN
2015 Impact Factor: 1.336
2015 SCImago Journal Rankings: 0.728
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorBradshaw, MAen_HK
dc.contributor.authorNewman, Jen_HK
dc.contributor.authorAitchison, JCen_HK
dc.date.accessioned2007-01-29T08:48:20Z-
dc.date.available2007-01-29T08:48:20Z-
dc.date.issued2002en_HK
dc.identifier.citationAntarctic Science, 2002, v. 14 n. 4, p. 395-411en_HK
dc.identifier.issn0954-1020en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42378-
dc.description.abstractSix ichnocoenoses in the clastic Devonian Horlick Formation (max. 56 m) confirm the nearshore marine character of eight of the nine lithofacies present. A basal sand sheet overlies a weathered granitic land surface (Kukri Erosion Surface) on Cambro - Ordovician granitoids. The level nature of this surface and the way it cuts across weathering profiles, suggests that the surface had been modified by marine processes prior to deposition. The basal sand sheet (Cross-bedded Sand sheet Lithofacies) contains tidal bundles, and at its top, abundant Monocraterion (Monocraterion Ichnocoenosis). The second sand sheet (Pleurothyrella Lithofacies) is heavily burrowed and shows alternating periods of sedimentation, burrowing, and erosion below wave base as the sea deepened (Catenarichnus Ichnocoenosis). With increasing transgression, finer sediments were deposited (Laminated Mudstone and Feldspathic lithofacies) in an unstable pattern of coarse sandbars and finer troughs (Cruziana-Rusophycus and Arenicolites ichnocoenoses) crossed by active longshore marine channels (Poorly-sorted Lithofacies, Spirophyton Ichnoocoenosis). Short-lived but powerful storms produced thin shelly tempestites (Shell-bed Lithofacies), whereas sporadic, very thin phosphate rich beds (Phosphatic Lithofacies) may have resulted from marine transgressions across the basin. The deepest water is probably represented by sediments of the Spirifer Lithofacies (Rosselia Ichnocoenosis). The Schulthess Lithofacies is regarded as fluvial, deposited in the lower reaches of a river draining a land area that lay towards Marie Byrd Land. Channels in the basal sand sheet indicate movement to the southwest, but orientation became more variable higher in the sequence. Four new measured sections are figured. The relationship of the Ohio Range to the rest of Antarctica during the Devonian is suggested.en_HK
dc.format.extent710984 bytes-
dc.format.extent25600 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=ANSen_HK
dc.relation.ispartofAntarctic Scienceen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsAntarctic Science. Copyright © Cambridge University Press.en_HK
dc.subjectBeacon Supergroupen_HK
dc.subjectSedimentologyen_HK
dc.subjectTrace fossilsen_HK
dc.subjectTransantarctic Mountainsen_HK
dc.titleThe sedimentary geology, palaeoenvironments and ichnocoenoses of the Lower Devonian Horlick Formation, Ohio Range, Antarcticaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0954-1020&volume=14&issue=4&spage=395&epage=411&date=2002&atitle=The+sedimentary+geology,+palaeoenvironments+and+ichnocoenoses+of+the+Lower+Devonian+Horlick+Formation,+Ohio+Range,+Antarcticaen_HK
dc.identifier.emailAitchison, JC: jona@hku.hken_HK
dc.identifier.authorityAitchison, JC=rp00658en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1017/S0954102002000196en_HK
dc.identifier.scopuseid_2-s2.0-0036914895en_HK
dc.identifier.hkuros79986-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036914895&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume14en_HK
dc.identifier.issue4en_HK
dc.identifier.spage395en_HK
dc.identifier.epage411en_HK
dc.identifier.isiWOS:000181258200012-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridBradshaw, MA=7102745056en_HK
dc.identifier.scopusauthoridNewman, J=7401659638en_HK
dc.identifier.scopusauthoridAitchison, JC=7102533858en_HK

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