Geology of the Stillwell Hills The Stillwell Hills region comprises granulite-facies gneisses which record evidence for multiple episodes of deformation and metamorphism spanning more than 2500 million years. The predominant orthogneiss package (Stillwell Orthogneiss) is thought to represent the margin of an Archaean craton exposed in Enderby Land, some 150 km to the west that was reworked during the late Proterozoic. Younger additions to the crust include Palaeoproterozoic charnockitic gneiss (Scoresby Charnockite) and Meso-Neoproterozoic mafic sills and dykes (Point Noble Gneiss, Kemp Dykes) and felsic pegmatites (Cosgrove Pegmatites). Subordinate supracrustal rocks, including metaquartzite, metapelitic, metapsammitic and calc-silicate gneiss (Dovers Paragneiss, Sperring Paragneiss, Stefansson Paragneiss, Keel Paragneiss, Ives Paragneiss) are intercalated and infolded with the Archaean-Palaeoproterozoic orthogneisses. web service Australia geology geoscience WFS 2.0.0 None © Commonwealth of Australia (Geoscience Australia) 2022. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode Geoscience Australia Client Services +61 2 6249 9111 GPO Box 378 Canberra ACT 2601 Australia clientservices@ga.gov.au 1.0.0 1.1.0 2.0.0 text/xml; subtype=gml/3.2 none local results hits GML32 GML32+ZIP GML32+GZIP application/gml+xml; version=3.2 GML3 GML3+ZIP GML3+GZIP text/xml; subtype=gml/3.1.1 GML2 GML2+ZIP GML2+GZIP text/xml; subtype=gml/2.1.2 GEOJSON GEOJSON+ZIP GEOJSON+GZIP ESRIGEOJSON ESRIGEOJSON+ZIP ESRIGEOJSON+GZIP KML application/vnd.google-earth.kml xml application/vnd.google-earth.kml+xml KMZ application/vnd.google-earth.kmz SHAPE+ZIP CSV CSV+ZIP CSV+GZIP Geopackage Geopackage+ZIP none local TRUE FALSE FALSE TRUE TRUE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE GeologyoftheStillwellHills:Contacts Contacts This layer represents geological contacts in the Stillwell Hills, Antarctica. urn:ogc:def:crs:EPSG::32740 59.31685091 -67.46285558 59.55019350 -67.32120989 GeologyoftheStillwellHills:Miscellaneous_Lines Miscellaneous Lines This layer represents miscellaneous lines mapped in the Stillwell Hills, Antarctica. urn:ogc:def:crs:EPSG::32740 59.31249204 -67.46742289 59.57026644 -67.29276702 GeologyoftheStillwellHills:Geologic_Unit_Polygons Geologic Unit Polygons This layer represents the geologic unit areas of the Stillwell Hills, Antarctica. urn:ogc:def:crs:EPSG::32740 59.31249204 -67.46742289 59.57026644 -67.29276702 TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE FALSE FALSE FALSE TRUE FALSE TRUE FALSE