An unbroken succession of Permian sediments
about 1430 feet thick on the northern flanks of
Mt. Nassau, about 10 miles north-west of Hobart,
Tasmania, shows the following succession of formations
from the base upwards: Bundella Mudstone;
Faulkner Group including the Geiss Conglomerate,
Rathbones Sandstone and Siltstone, Byers Sandstone,
Jarvis Siltstone, Parramore Sandstone and
Siltstone, Altamont Conglomerate and Fergusson
Siltstone; Rayner Sandstone; Cascades Group including
the Nassau Siltstone, Berriedale Limestone
and Grange Mudstone; "Woodbridge Glacial Formation";
Risdon Sandstone and finally the Ferntree
Mudstone. These range in age from Lower
Artinskian to Kungurian. These formations, except
the "Woodbridge Glacial Formation", are defined.
The Faulkner Group consists of two cyclothems,
recording two brief emergences, one soon
after the other,in a time of general submergence.
The Grange Mudstone and Berriedale Limestone are
at least partly facies variants of one another. A
notable feature is the presence of erratics, except
in the two non-marine formations in the Faulkner
Group, and this is perhaps related to the poor
sorting, and mineralogical immaturity of the sediments
and the angularity of most of the grains in
all rocks. All of these features are considered as
the result of glacio-marine deposition. The source
area included granitic, sedimentary and regionally
metamorphosed rocks
