Stratigraphy of Jurassic pyroclastic rocks in the Transantarctic Mountains
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Cited by (30)
From the transantarctic basin to the ferrar large igneous province-new palynostratigraphic age constraints for triassic-jurassic sedimentation and magmatism in East Antarctica
2014, Review of Palaeobotany and PalynologyCitation Excerpt :Radiometric age constraints: No radiometric ages have been obtained from the Shafer Peak Formation to date (Elsner, 2010). However, four samples of tuff layers from the Hanson Formation, a local equivalent of the Shafer Peak Formation in the CTM, have yielded a poorly constrained middle Pliensbachian age (186 ± 8 Ma; Faure and Hill, 1973; see Elliot, 2000). Although this date is considered uncertain due to widespread zeolitization (Elliot, 2000), it completely matches the palynological age determined here.
The Eisenhower Range, Transantarctic Mountains: Evaluation of qualitative interpretation concepts of thermochronological data
2013, Chemical GeologyCitation Excerpt :Beacon sedimentation was followed by intrusion and extrusion of magmatic rocks in/on basement and sediments during the Ferrar event at ~ 180 Ma (e.g., Elliot and Fleming, 2008). The subaerial/subaquatic nature of these rocks is recognized by the presence of syn-Ferrar pyroclastic and siliciclastic, partially fossil-bearing sedimentary sequences; pillow lavas; phreatomagmatic structures and diatremes of local hydromagmatic explosive events; vesicles and sediment suspensions in sills; and plastic deformation of Jurassic sediments by Ferrar apophyses (e.g., Elliot, 2000; Schöner et al., 2007; Viereck-Götte et al., 2007; Elliot and Fleming, 2008). West of the study area, basement is locally overlain by Neogene volcanic rocks and/or Pliocene sediments and glacial deposits.
Quantification of vesicle characteristics in some diatreme-filling deposits, and the explosivity levels of magma-water interactions within diatremes
2012, Journal of Volcanology and Geothermal ResearchPhysical volcanology and geological relationships of the Jurassic Ferrar Large Igneous Province, Antarctica
2008, Journal of Volcanology and Geothermal ResearchCitation Excerpt :In the waning stages of pyroclastic activity, lacustrine sediments were deposited and paleosols formed, indicating confining environments and surface exposure for significant time periods. The switch to lava effusion following an hiatus has been attributed to increased magma supply rates and/or decrease in availability of water for phreatomagmatism, both of which affect magma–water ratios, or magma/water interaction ceased as a result of sealing of magma conduits (Hanson and Elliot, 1996; Elliot, 2000; Ross et al., 2005). Phreatomagmatic activity, however, continued sporadically during lava eruption, and is recorded by tuff–breccia and lapilli–tuff beds low in the lava sequence in CTM (Mt. Bumstead), SVL (Carapace Nunatak, Mt Brooke), and PAM (Tent Peak), and high in the section in the Mesa Range.
Geological evolution of the Coombs-Allan Hills area, Ferrar large igneous province, Antarctica: Debris avalanches, mafic pyroclastic density currents, phreatocauldrons
2008, Journal of Volcanology and Geothermal Research