[Parameters: Topic='SOLID EARTH', Term='GEOMORPHOLOGY', Variable_Level_1='GLACIAL LANDFORMS/PROCESSES']
Neogene Biostratigraphy of the Pagadroma GroupEntry ID: ASAC_1065
Abstract: From the abstract of the referenced papers:
The northern Prince Charles Mountains overlook the western side of the 700km long Lambert Glacier-Amery Ice Shelf drainage system. Within these mountains, at Amery Oasis and Fisher Massif, the Cenozoic glaciomarine Pagodroma Group consists of four uplifted Miocene and Pliocene-early Pleistocene formations here named the Mount Johnston, Fisher Bench, ... Battye Glacier and Bardin Bluffs formations. These are composed of massive and stratified diamicts, boulder gravels and minor laminated sandstones, siltstones and mudstones. Each formation rests on either Precambrian metamorphic rocks, or on Permo-Triassic fluvial strata. The unconformity surfaces are parts of the walls and floors of palaeofjords. The Miocene Fisher Bench Formation exceeds 350 m in thickness at Fisher Massif, where the yet older Miocene (or Oligocene) Mount Johnston Formation overlies basement rocks at up to 1400 m above sea level. Individual formations contain either Miocene diatoms, or else Pliocene-early Pleistocene diatom foram assemblages. The diamicts are interpreted as fjordal ice-proximal or ice-contact sediments, deposited seawards of tidewater glacier fronts located some 250 to 300 km inland of the present ocean margin. Each formation records an ice recession following a glacial expansion.
This work was also completed for ASAC project 2086 (ASAC_2086).
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:
(Click for Interactive Map)
Start Date: 1998-09-30Stop Date: 1999-03-31
LAND SURFACE > GEOMORPHOLOGY > GLACIAL LANDFORMS/PROCESSES
PALEOCLIMATE > LAND RECORDS > GLACIATION
PALEOCLIMATE > LAND RECORDS > STRATIGRAPHIC SEQUENCE
SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > GLACIAL LANDFORMS
BIOLOGICAL CLASSIFICATION > PROTISTS > DIATOMS
BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS
Quality Values provided in temporal coverage are approximate only.
Access Constraints A PDF copy of the referenced papers are available at the URL given below.
Use Constraints This data set conforms to the PICCCBY Attribution License
Data Set Progress
Distribution Media: HTTP
Distribution Size: 3994 KB
Distribution Format: PDF, excel
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 3 6266 2980
Fax: +61 3 6226 2973
Email: Andrew.McMinn at utas.edu.au
Institute of Antarctic and Southern Ocean Studies University of Tasmania Private Bag 77
Province or State: Tasmania
Postal Code: 7001
McKelvey, B., Hambrey, M., Harwood, D., Mabin, M., Webb, P., Whitehead, J. (2001), The Pagodroma Group - The Neogene Record in the Northern Prince Charles Mountains of a Dynamic Lambert Glacier and East Antarctic Ice Sheet, Antarctic Science, 13, 4, 455-468
Whitehead, J.M., Harwood, D.M., McKelvey, B.C. Hambrey, M.J. and McMinn, A. (2004), Diatom biostratigraphy of the Cenozoic fjordal Pagodroma Group, Northern Prince Charles Mountains, East Antarctica., Australian Journal of Earth Sciences, 51, 521-542
Creation and Review Dates
DIF Creation Date: 2000-08-09
Last DIF Revision Date: 2011-04-21