Tusschenin Fm
Period:
Mesoarchean
Age Interval:
Late Mesoarchean
Province:
Karoo Basin
Type Locality and Naming
Synonym:
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Coronation Fm (conformable)
Upper contact
Palmietfontein Fm (conformable)
Regional extent
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[29.18,-25.59],[29.87,-25.45],[30.4,-25.83],[30.7,-26.17],[30.5,-26.46],[30.56,-26.8],[30.85,-27.38],[31.28,-27.44],[32.02,-27.31],[32.33,-27.98],[31.97,-28.65],[31.64,-28.72],[31.52,-28.47],[31.26,-28.41],[30.88,-28.69],[30.68,-29.12],[30.54,-29.68],[30.27,-30.24],[29.89,-31.4],[29.35,-32.12],[27.84,-33.53],[27.16,-33.97],[27.07,-33.79],[26.4,-33.66],[25.67,-33.73],[24.75,-33.68],[23.56,-33.57],[22.85,-33.73],[21.35,-33.75],[19.81,-33.7],[19.72,-32.63],[19.32,-31.76],[19.27,-31.31],[18.94,-30.73],[18.55,-30.28],[18.75,-29.63],[19.23,-29.48],[20.52,-29.32],[20.79,-29.5],[21.84,-29.92],[22.51,-30.19],[22.92,-30.22],[22.67,-29.63],[23.1,-29.1],[23.41,-29.14],[23.96,-28.98],[24.53,-28.56],[25.33,-27.75],[26.83,-26.88],[27.84,-26.55],[29.18,-25.59]]]]}}
Fossils
Age
Arbitrarily assigned 2/6th up the Government Subgroup => cs. 2925 to 2918 Ma
Age Span:
Beginning stage:
Mesoarchean
Fraction up in beginning stage:
0.6875
Beginning date (Ma):
2,925.00
Ending stage:
Mesoarchean
Fraction up in the ending stage:
0.705
Ending date (Ma):
2,918.00
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Rebecca Bobick (and Wen Du), modified from Walraven, F., Armstrong, R.A., and Kruger, F.J., A chronostratigraphic framework for the north-central Kaapvaal craton, the Bushveld Complex and the Vredefort structure, Tectonophysics, 171 (1990), 23-48.