Fig. 2: Shaded-relief satellite image with sample sites at Mt. Sirius and Lonewolf Nunataks. | Nature Communications

Fig. 2: Shaded-relief satellite image with sample sites at Mt. Sirius and Lonewolf Nunataks.

From: Exhumation and tectonic history of inaccessible subglacial interior East Antarctica from thermochronology on glacial erratics

Fig. 2

Sampled glacial erratics originate from inboard (upstream) of the TAM22,69. Mesoarchean and Paleoproterozoic basement (pink) defined by rock outcrop of the Nimrod Complex in the Miller (MR) and Geologists (GR) ranges70, together with subglacial geologic terrain defined by aeromagnetic anomalies14. Proterozoic Nimrod igneous province (brown) is defined by high-amplitude, positive subglacial magnetic anomalies that resemble those of Proterozoic crustal provinces in Laurentia and Australia14; there are no rocks of this province exposed, but it may be part of the source area for the igneous erratics studied here22. Purple hachured line marks edge of the Neoproterozoic rifted cratonic margin of East Antarctica. White arrows show modern ice-flow directions65. Base image is from the MODIS radiometer Mosaic of Antarctica22.

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