Sedimentological and palaentological examination of the Devonian Horlick formation in the Ohio Range of the Horlick Mountains

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Citation:

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Title: Sedimentological and palaentological examination of the Devonian Horlick formation in the Ohio Range of the Horlick Mountains

Description:

Abstract:

15 sections of the Horlick formation were measured in detail along the Ohio escarpment from Discovery Ridge to Lackey Ridge. The Ohio Range contains the only well exposed record of unequivocally marine Devonian sediments in Antarctica, and is a unique and rarely visited locality. Three sections were studied on Discovery Ridge where the main lithofacies were established. One section was studied on the second spur west of Discovery Ridge, five sections were studied on Lackey Ridge at the extreme western end of the escarpment and four on Darling Ridge. To complete the coverage, two sections were measured on Schulthess Buttress, one on the western spur and the other on the eastern spur. Seven lithofacies were described and the inter-relationship between each was studied in detail. Fossils that had not been recorded before were collected and the relationships of these fossils to each other and to the sediment in when they were enclosed was examined. The fossils include large bivalves, brachiopods, trilobites, gastropods, monoplacophorans, crinoidal detritus, fish bones and plates and tentaculitids. Psilophyte plant fossils were also discovered. Detailed palaeontological collections were made. The exposed base of the Horlick Formation allowed a unique chance to study a near-shore assemblage of sediments derived from a granitic landmass. Shale samples were collected for palaeomagnetic work. The Buckeye Formation is one of the thicker sequences of Permian glacial sediments in the Transantarctic Mountains and formed some spectacular outcrops. Three small slumped horizons were measured. A three-directional foliation in the sandstones at the top of the formation was measured and photographed. Animal trails were noted and several lithologies sampled. A horizon rich in Glossopteris leaves and non-marine Permian bivalves, the latter recorded for the first time in Antarctica, were collected from the the highest coal measure beds on Mt. Glossopteris.

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Bradshaw, M. 2010. Devonian trace fossils of the Horlick Formation, Ohio Range, Antarctica: Systematic description and palaeoenvironmental interpretation. Ichnos 17: 58-114. Bradshaw, M. Ohio Range party worked near Pole. Antarctic 9(1): 7-9, 1980. Bradshaw, M.A. McCartan, L. The depositional environment of the lower Devonian Horlick Formation, Ohio Range. in: Antarctic earth science.Oliver R.L. James P.R. Jago J.B. (eds) Canberra: Australian Academy of Science. 1983. pp.238-241 Bradshaw, M.A. Permian nonmarine bivalves from the Ohio Range, Antarctica. Alcheringa 8: 305-309, 1984. Bradshaw, M.A. McCartan, L. Kellogg, K. Reconnaissance geologic map of the Ohio Range, Transantarctic Mountains, Antarctica. Scale 1:50,000. Reston, VA: US Geological Survey. 1986. [Antarctic geological map series: A-13] Bradshaw, M.A. McCartan, L. Palaeoecology and systematics of Early Devonian bivalves from the Horlick Formation, Ohio Range, Antarctica. Alcheringa 15(1): 1-42, 1991. Aitchison, J.C. Bradshaw, M.A. Newman, J. Lithofacies and origin of the Buckeye Formation: late Paleozoic glacial and glaciomarine sediments, Ohio Range, Transantarctic Mountains, Antarctica. Palaeogeography, palaeoclimatology, palaeoecology 64: 93-104, 1988. Kellogg, K.S. A paleomagnetic investigation of rocks from the Ohio Range and the Dry Valleys, Transantarctic Mountains, Antarctica. New Zealand journal of geology and geophysics 31(1): 77-85, 1988. McCartan, L. & Bradshaw, M.A. Petrology and sedimentology of the Horlick Formation (Lower Devonian), Ohio Range, Transantarctic Mountains, Antarctica. U.S. Geological Survey Bulletin 1780, 1-31, 1987. Bradshaw, M.A. Webers, G.F. The Devonian rocks of Antarctica. in: The Devonian of the world, vol. 1.McMillan N.J. Embry A.F. Glass D.J. (eds) Calgary, Alberta: Canadian Society of Petroleum Geologists. 1988. pp.783-795 [Memoir 14] Bradshaw, M.A. The Devonian Pacific margin of Antarctica. in: Geological evolution of Antarctica; proceedings of the Fifth International Symposium on Antarctic Earth Sciences, Cambridge, 1987.Thomson M.R.A. Crame J.A. Thomson J.W. (eds) Cambridge: Cambridge University Press. 1991. pp.193-197 Bradshaw, M.A. Geological history. in: Antarctica: the Ross Sea region.Hatherton T. (ed) Wellington: DSIR Publishing. 1990. pp.42-63 [DSIR information series: 165] ISBN 0477025862

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19791120

Ending_Date: 19800130

Currentness_Reference:Unknown

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: 114.0

East_Bounding_Coordinate: 114.0

North_Bounding_Coordinate: -84.75

South_Bounding_Coordinate: -84.75

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD PLATFORM

Theme_Keyword_Thesaurus: GCMD INSTRUMENT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > MACROFOSSILS

Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > MICROFOSSILS

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC LANDFORMS

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > BEDROCK LITHOLOGY

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > METAMORPHIC ROCKS

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > FOLDS

Theme_Keyword: FIELD SURVEYS

Theme_Keyword: GROUND-BASED OBSERVATIONS

Theme_Keyword: FIELD INVESTIGATION

Theme_Keyword: VISUAL OBSERVATIONS

Theme_Keyword: Ohio Range

Theme_Keyword: Horlick Mountains

Theme_Keyword: GEOSCIENTIFIC INFORMATION

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: CONTINENT > ANTARCTICA

Place_Keyword: GEOGRAPHIC REGION > POLAR

Access_Constraints: Access to samples follows the specifications of Canterbury Museum.

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: MARGARET BRADSHAW

Contact_Position: INVESTIGATOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Department of Geological Sciences

Address: University of Canterbury

Address: Private Bag 4800

City: Christchurch

Postal_Code: 8140

Country: New Zealand

Contact_Voice_Telephone: +64 3 364 2987 ext 3892

Contact_Facsimile_Telephone: +64 3 364 2769

Contact_Electronic_Mail_Address: margaret.bradshaw@canterbury.ac.nz

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Canterbury Museum holds over 2000 rock specimens from Antarctica. Most of these represent the lithologies of the Beacon Supergroup of rocks and were collected during several NZARP events over a number of seasons in the 1970s and 1980s. The collections were made at a number of sites in the Transantarctic Mountains of Victoria Land. In addition, small collections were made at Cape Adare and Cape Hallett. Collected at the same time were fossils (in excess of 1200 specimens) of a variety of ages, but mostly Devonian (416-359 Ma), Permian (299-251 Ma) and Triassic (251-199 Ma). Represented among the fossils are plants, invertebrates (mostly arthropods, molluscs and brachiopods) and vertebrates (fish). In the collections Antarctic rock have catalogue numbers with the prefix RA; fossils have the prefix AF. Rock samples and fossils specific to this expedition include: Rocks RA820-866 from Discovery Ridge, Ohio Range Fossils AF294-303; AF317-586; AF730-732 Permian invertebrates and plants from Mt Glossopteris, Ohio Range and Devonian invertebrates from Discovery Ridge AF587-726 Devonian invertebrates from Ohio Range (Discovery Ridge, Lackey Ridge, Darling Ridge, Mt Glossopteris) Please contact: Dr Norton Hiller Curator of Geology Canterbury Museum Rolleston Avenue, Christchurch 8013 NEW ZEALAND Phone: +64 3 366 5000 Direct dial: +64 3 366 9429 ext 820 Fax: +64 3 366 5622 Email: nhiller@canterburymuseum.com www.canterburymuseum.com

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Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NZ/NZAI/ANZ > Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand

Contact_Person: SHULAMIT GORDON

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Antarctica New Zealand

Address: Private Bag 4745

City: Christchurch

Country: New Zealand

Contact_Voice_Telephone: +64 3 358 0200

Contact_Facsimile_Telephone: +64 3 358 0211

Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz

Resource_Description: K026_1979_1980_NZ_1

Distribution_Liability:

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Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Not Available

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.antarcticanz.govt.nz/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20050922

Metadata_Review_Date: 20101101

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: SHULAMIT GORDON

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Antarctica New Zealand

Address: Private Bag 4745

City: Christchurch

Country: New Zealand

Contact_Voice_Telephone: +64 3 358 0200

Contact_Facsimile_Telephone: +64 3 358 0211

Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time