4
1 General Review of Permian Sediments in Western Australia
Fig. 1.1 Collie Basin
Perth Basin, the Lyons Group in the Carnarvon Basin and the Grant Formation in
the Canning Basin, whose age is thought to be Sakmarian. Upper Carboniferous
rocks were encountered below the Grant Formation in the Canning Basin (Balme
1959). The tillites in the Collie Basin are predominantly greenish grey mudstones
and siltstones, referred to sometimes as the ‘Stockton Formation’ (Low 1958). The
Stockton Formation varies in thickness from a few meters to about 212 m, being
close to 100 m thick in Site B Bore of Collie and 10 m thick in Site D Bore of
Muja. The formation is overlain by the Collie Coal Measures which are over 900 m
thick in the Collie sub-basin and 67 m thick in the Muja sub-basin (LeBlanc Smith
1993). The Lower Collie Coal Measures have been correlated with the Irwin River
Coal Measures, which are believed to be of Artinskian age (Balme in McWhae et al.
1958). The Irwin River Coal Measures overlie the high cliff sandstones, which have
been dated as Upper Sakmarian (Glenister and Furnish 1961).
The upper or Collie Burn horizon is considered to be of Upper Permian age. The
Permian strata in Collie Basin are overlain by Cretaceous deposits (LeBlanc Smith
1993).
1 General Review of Permian Sediments in Western Australia
Fig. 1.1 Collie Basin
Perth Basin, the Lyons Group in the Carnarvon Basin and the Grant Formation in
the Canning Basin, whose age is thought to be Sakmarian. Upper Carboniferous
rocks were encountered below the Grant Formation in the Canning Basin (Balme
1959). The tillites in the Collie Basin are predominantly greenish grey mudstones
and siltstones, referred to sometimes as the ‘Stockton Formation’ (Low 1958). The
Stockton Formation varies in thickness from a few meters to about 212 m, being
close to 100 m thick in Site B Bore of Collie and 10 m thick in Site D Bore of
Muja. The formation is overlain by the Collie Coal Measures which are over 900 m
thick in the Collie sub-basin and 67 m thick in the Muja sub-basin (LeBlanc Smith
1993). The Lower Collie Coal Measures have been correlated with the Irwin River
Coal Measures, which are believed to be of Artinskian age (Balme in McWhae et al.
1958). The Irwin River Coal Measures overlie the high cliff sandstones, which have
been dated as Upper Sakmarian (Glenister and Furnish 1961).
The upper or Collie Burn horizon is considered to be of Upper Permian age. The
Permian strata in Collie Basin are overlain by Cretaceous deposits (LeBlanc Smith
1993).