92 DEVONIAN FOSSILS 
MATRIX AND FACIES 
The fossils consist mostly of casts and moulds in a sandstone 
so fine-grained that it looks like a mudstone, but is nevertheless 
arenaceous; the fracture is shaley. The colour is light brown, but 
patches of grey suggest that originally the rock was of a grey 
colour and has turned light brown through oxidation of ferru- 
ginous matter. Some of the rock is not quite decalcified, certain 
specimens retaining part of the original ealeie matter of the 
shells; a number of the latter were treated with hydrochloric acid 
to clear them for study. Thus, originally, the bedrock was a grey 
calcareous arenaceous shale. 
Specimens 27,188 and 27,190' are of coarser sandstone, and 
are characterized by the presence of great numbers of erinoid 
stem joints. They represent a change in facies, no doubt towards 
shallower waters. A couple of pieces of rock are crowded with a 
branching polyzoan, and other small facies differences have been 
noted. 
The fossils from Sandy’s Creek are of Bohemian (Konieprusy ) 
type facies, i.e., inner off-shore, or waters of moderate depth. The 
Lower Devonian beds of the Lilydale and Killara districts are of 
this facies (Gill, 1939, 1942, 1945a, 1945b, 1949a, 1949b, 1949c). 
As is often the case with this type of facies, calcareous beds are 
developed. Etheridge described corals (1899) and determined 
shelly fossils (1902) from Sandy’s Creek. 
The rocks from Sandy’s Creek have been affected by shearing 
movements as is shown by the distortion of the fossils. Skeats 
(1929, pp. 108-111) has discussed the tectonics of the area. 
FAUNA 
In the palaeontological collection studied, the following forms 
have been recognized: 
PLANTAE 
Frag. indet. of simple land plant of the Hostimella type. 
ANTHOZOA 
Casts of “ Lindstroemia”’ type of solitary corals. 
CRINOIDEA 
Numerous stem joints and some pieces of stem. 
POLYZOA 
Acanthoclema flecuosa Chapman. 
1 Specimen numbers in this paper, unless stated otherwise, are registered numbers in 
the museum of the Victorian Mines Department. 
