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Buggisch, Werner; Kleinschmidt, Georg; Höhndorf, Axel; Pohl, Jean (1994): Tab. 1: Rb-Sr data on metasediments in the Shackleton Range [dataset]. PANGAEA,, Supplement to: Buggisch, W et al. (1994): Stratigraphy and facies of sediments and low-grade metasediments in the Shackleton Range, Antarctica. Polarforschung, 63(1), 9-32, hdl:10013/epic.29713.d001

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Summary: The stratigraphy of the Shackleton Range established by Stephenson (1966) and Clarkson (1972) was revised by results of the German Expedition GEISHA 1987/88. The "Turnpike Bluff Group" does not form a stratigraphic unit. The stratigraphic correlation of its formations is still a matter of discussion. The following four formations are presumed to belong to different units: The Stephenson Bastion Formation and Wyeth Heights Formation are probably of Late Precambrian age. The Late Precambrian Watts Needle Formation, which lies unconformably on the Read Group, is an independant unit which has to be separated from the "Turnpike Bluff Group". The Mount Wegener Formation has been thrusted over the Watts Needle Formation. Early Cambrian fossils (Oldhamia sp., Epiphyton sp., Botomaella (?) sp. and echinoderms) were found in the Mt. Wegener Formation in the Read Mountains.
The Middle Cambrian trilobite shales on Mount Provender, which form the Haskard Highlands Formation, are possibly in faulted contact with the basement complex (Pioneers and Stratton Groups). They are overlain by the Blaiklock Glacier Group, for which an Ordovician age is indicated by trilobite tracks and trails, low inclination of the paleomagnetic field and the similarity to the basal units of the Table Mountain Quartzite in South Africa.
The Watts Needle Formation represents epicontinental shelf sediments, the Mount Wegener Formation was deposited in a (continental) back-arc environment, and the Blaiklock Glacier Group is a typical molasse sediment of the Ross Orogen.
Median Latitude: -80.755547 * Median Longitude: -25.596679 * South-bound Latitude: -80.800000 * West-bound Longitude: -29.550000 * North-bound Latitude: -80.733000 * East-bound Longitude: -23.506000
Minimum Elevation: 0.0 m * Maximum Elevation: 0.0 m
Shackleton_Range * Latitude: -80.500000 * Longitude: -22.000000 * Elevation Start: 0.0 m * Elevation End: 0.0 m * Location: Shackleton Range, Antarctica * Method/Device: Geological sample (GEOS)
NBS 987 = 0.71023 ± 0.00007, analytical error at the 95% confidence level is ± 2% for 87Rb/86Sr and ± 0.06% for 87Sr/86Sr. Quoted errors are at the level of 95% confidence. Decay constants as in Steiger & Jäger (1977). *normalized to 86Sr/88Sr=0.1194; samples 88-155, 88-108 omitted for regression calculation.
374 data points

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