Neogene glacial geology of the Prince Charles Mountains

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Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Neogene glacial geology of the Prince Charles Mountains
Description:
Abstract:
From the abstracts fo some of the referenced papers: In the Amery Oasis of the northern Prince Charles Mountains, the glaciomarine Bardin Bluffs Formation of the Pagodroma Group was deposited between the Late Pliocene (less than 3.1 Ma) and Early Pleistocene (>1 Ma). The formation provides evidence of (i) a reduced East Antarctic ice sheet compared to that of the present day and (ii) a subsequent Plio-Pleistocene ice sheet expansion. The formation consists of two member. The older, basal Member 1 is about 12.5 m thick and consists of relatively ice-distal silty, sandy and sparsely fossiliferous fjordal strata. Member 1 reflects largely ice-free marine sedimentation about 250 km inland from the current Amery Ice Shelf edge. The member is restricted to the area about the north-eastern end of Pagodroma Gorge where it infills a chemically weathered erosion surface, cut in the form of a valley on the Permo-Triassic Amery Group. Weathering occurred during aerial exposure of the Amery Oasis in a warmer climate than that of today. The younger Member 2 exceeds 40 m in thickness and is made up of coarse ice proximal glaciomarine diamicts. It overlies disconformably Member 1 at Pagodroma Gorge. Elsewhere, Member 2 rests directly upon a smoothed and striated erosion surface, cut on the Amery Group, which was part of a fjord floor. This erosional surface and the facies contrast between the two members, indicates an East Antarctic Ice Sheet expansion and Lambert Glacier grounding-line advance. The Menzies Range in the southern Prince Charles Mountains, Antarctica, records at least four intervals of Cenozoic terrestrial glacigene sedimentation, and two periods of glacial erosion. The oldest Cenozoic strata, here named the Pardoe Formation, are greater than 240 m thick, and consist of variable diamicts with subordinate sandstones and minor laminated lacustrine siltstones. The Pardoe Formation overlies a rugged erosion surface cut into Precambrian basement. Two subsequent Cenozoic sequences are here named informally the Trail diamicts and the younger Amphitheatre diamicts. The latter infilled the lower regions of an extremely rugged erosion surface, many components of which still dominate the present topography. The palaeodrainage of this erosion surface is markedly discordant with that of the older erosion surface underlying the Pardoe Formation. These three depositional events and the two associated erosion surfaces record warmer climates and increased snow accumulation under conditions of temperate wet-based glaciation. During the excavation of the sub-Amphitheatre diamict erosion surface, the East Antarctic ice sheet was either absent, further inland or the height of its surface relative to the Menzies Range as considerably lower than at present. The fourth and youngest depositional episode, recorded by a veneer of boulder gravel distributed along the northern flank of the Menzies Range, is from dry-based glacier ice, and assumed to be less than 2.6 Myr. This work was also completed for ASAC project 1065 (ASAC_1065). Some explanatory notes for the excel files are: BARDIN = Bardin Bluffs GLOSS. = Glossopteris Gully BAIN= Bainmedart Cove PCM = Prince Charles Mountains AM = Amery (as in Amery Oasis) Sample numbers are from different positions within exposed sequences (illustrated in figures in the paper). Top and Bottom represent the &top& and &bottom& position in some sequences. These are also illustrated in the figures. Positions are illustrated in the manuscript Whitehead, et al (2004). Dm = diamict sample, Mud = Mud. Raw slides = standard strewn microscope slides Concentrated slides = heavy liquid separation to concentrate the fossils The fields in this dataset are: Location Name Number Lithology Bardin Bluffs Battye Glacier Fisher Bench Mt Johnston Length (micrometres) Width (micrometres)
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Whitehead, J.M. and McKelvey, B.C. 2001 The stratigraphy of the Pliocene - Early Pleistocene Bardin Bluffs Formation, Amery Oasis, Northern Prince Charles Mountains, Antarctica. Antarctic Science 13 1 79-86
Supplemental_Information:
REFERENCE: Whitehead J.M. and McKelvey B.C. 2002 Cenozoic glacigene sedimentation and erosion at the Menzies Range, southern Prince Charles Mountains, Antarctica. Journal of Glaciology 48 161 226-236
Supplemental_Information:
REFERENCE: Whitehead, J.M., McKelvey, B., and McMinn, A. 2000 1997/1998 Cenozoic geological fieldwork in the Southern Prince Charles Mountains of East Antarctica. Terra Antartica 7 655-656
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19971001
Ending_Date: 19980331
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 65.0
East_Bounding_Coordinate: 70.0
North_Bounding_Coordinate: -70.0
South_Bounding_Coordinate: -73.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > GLACIATION
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > GLACIAL LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > AGE DETERMINATIONS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRATIGRAPHIC SEQUENCE
Theme_Keyword: FIELD SURVEYS
Theme_Keyword: Amery Ice Shelf
Theme_Keyword: Amery Oasis
Theme_Keyword: Bardin Bluffs
Theme_Keyword: Battye Glacier
Theme_Keyword: Beaver Lake
Theme_Keyword: Diamicts
Theme_Keyword: Erosion
Theme_Keyword: Fisher Bench
Theme_Keyword: Fjordal Sedimentation
Theme_Keyword: Fjords
Theme_Keyword: Grounding Line Fluctuations
Theme_Keyword: Length
Theme_Keyword: Lithology
Theme_Keyword: Location
Theme_Keyword: Mt Johnston
Theme_Keyword: Name
Theme_Keyword: Northern Prince Charles Mountains
Theme_Keyword: Number
Theme_Keyword: Pleistocene
Theme_Keyword: Pliocene
Theme_Keyword: Prince Charles Mountains
Theme_Keyword: Sedimentation
Theme_Keyword: Southern Prince Charles Mountains
Theme_Keyword: Width
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: INLAND WATERS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > PRINCE CHARLES MOUNTAINS
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: A PDF copy of the referenced papers are available for download from the url given below.
Use_Constraints:
This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/).
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ANDREW MCMINN
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Institute of Antarctic and Southern Ocean Studies
Address: University of Tasmania
Address: Private Bag 77
City: Hobart
State_or_Province: Tasmania
Postal_Code: 7001
Country: Australia
Contact_Voice_Telephone: +61 3 6266 2980
Contact_Facsimile_Telephone: +61 3 6226 2973
Contact_Electronic_Mail_Address: Andrew.McMinn@utas.edu.au
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The dates provided in temporal coverage are approximate only.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: AU/AADC > Australian Antarctic Data Centre, Australia
Contact_Person: DATA OFFICER AADC
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: metadata@aad.gov.au
Resource_Description: ASAC_2086
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: PDF, excel
Transfer_Size: 5531 KB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/portal/download_file.c...
Access_Instructions:
Download point for the data
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://secure3.aad.gov.au/proms/public/projects/r...
Access_Instructions:
Public information for ASAC project 2086
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/metadata/citation.cfm?...
Access_Instructions:
Citation reference for this metadata record and dataset
Fees: Free
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Metadata_Reference_Information:
Metadata_Date: 20000811
Metadata_Review_Date: 20140829
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ANDREW MCMINN
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Institute of Antarctic and Southern Ocean Studies
Address: University of Tasmania
Address: Private Bag 77
City: Hobart
State_or_Province: Tasmania
Postal_Code: 7001
Country: Australia
Contact_Voice_Telephone: +61 3 6266 2980
Contact_Facsimile_Telephone: +61 3 6226 2973
Contact_Electronic_Mail_Address: Andrew.McMinn@utas.edu.au
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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