Cretaceous Stratigraphy of Lower Murchison River Area, 27 
Western Australia. 
side the outcrops disappear at the edge of the sand j)lain at about 400 
feet above sea level, in most places about a mile or so from the river 
bed. On the north-west side the belt of outcrops is wider, in places up 
to four miles wide, and towards the noiih the Tumldagooda Sandstone 
disappears under the Butte Sandstone and higher formations. The out- 
crops are generally good. The sandstone is strongly dissected by erosion 
and can be studied in numerous clift's along the river, along hill slopes,, 
and in the many tributaries. 
The Tumhlagooda Sandstone must have a wide distri])ution outside 
the area of our investigations. It seems to form the coastal elitfs as 
far south as one can see from Tumhlagooda Hill and other elevations 
north of the Miircliison River, that is for at least 12 miles as far as 
and beyond Bluff Point, but ])rol)ably much farther (text figs. 5, (3, and 7). 
Xo outcrops of the sandstone can be seen along the coast north of Tum- 
l)lagooda Hill, the lower parts of the coastal cliffs being liere entirely 
covered with younger formations (sand and ^‘coastal limestones”). In 
an easterly direction the Tnmblagooda Sandstone certainly continues 
beyond Mt. Curious — we mentioned under ^‘Previous Work’’ tlie deep 
gorge cut l)y the ■Murchison River, and the formation can be followed 
along Bungabandy Creek and still farther east. It was seen by the junior 
author in Ifilfi as fai’ east as Wai'ranjahaliba Spi’ing, 19 miles E.S.E. 
of iMt. Curious. Maitland reports that we.st of Ueraldiue at llardabut 
Pool, in the groat soutliern bond, the sandstone is faulted down against 
pre-Cambrian rocks, and, though tlie geology along the , Murchison River 
downstream from Hardabut Pool to the area wliieh Ave ha\'e mapped has 
Text Fig. 5. 
View from one of the low hills in Fig. 4 looking south across 
Murchison River to Meanarra Hill. 
