95 
^•S.E. at 45°, but owing to the thickness o£ the scrub and other difficulties the relation 
of the limestone to other rocks in the neighbourhood is not ascertainable. This 
'ttiestone has yielded a largo number of fossils in good preservation, amongst ■which 
Colleague has recognised : — 
Spirifera lata, McCoy. 
„ Stokesii (common to G-ympie). 
Martinia Darwinii. 
Produoitis suhpuadratus (common to Rockhampton Beds). 
„ sp. ind. (/.), PI. 44, fig. 13. 
Aviculopeeten limceformis (? common to Gympie Beds). 
Jdl%i,rydesma, sp. ind. 
^ Bet-ween Tatton ancl St. Lawrence, in ascending the coast range from “VVaverley 
tation to Killarney by the old road from St. Lawrence to Peak Downs, a great thick- 
of coarse green conglomerate is exposed. The sandy matrix and the boulders are 
similar material — namely, fclsite and porphyrite — so that the conglomerate does not 
^Bather in the customary manner of conglomerates. The exposed surfaces, on the 
®<^ntraTy, show the pebbles shorn off down to the same level as the matrix, so that it is 
y on a fresh fracture that the true character of the rock can be seen. In this respect 
j ® '^oiiglomerate resembles the Gympie conglomerate. It probablj belongs to the same 
°i’tt>ation as the Tatton Limestone. 
^r. Smith found his Central Queensland Shales” (Rockhampton Beds) 
^^conformably overlaid by the strata of the Styx River Coal Field (Burrum Beds) on 
Arrack Creek, a tributary of the Styx. Between the Styx Coal hield and the Bald Hills 
gf among the Central Queensland Shales a thick bed of encrinital limestone, 
'ing north-north-west, and very probablv a continuation of the Dalma and Rock- 
®'®ptou Limestones. 
I have little hesitation in mapping the greater part of the district lying between 
® “Urriim Coal Field on the east, and the Dawson River Coal Field on the ■west, from 
,^^yndah on the south to Broadsound on the north, as of the age of the Gympie Beds. 
Q ^rea, it may be mentioned, was mapped as Devonian in the Geological Map of 
^^ueensland issued in 1886. In some districts within this large area the Gympie Beds 
.p ® °^®’’laid by Basalt, Desert Sandstone, the Burrum Beds, and by the Middle and 
aps the Upper Series of the Bowen River Coal Field, while on the other hand 
anito and other plutonic and intrusive rocks and masses of serpentine occupy portions 
the area. 
'f^he late Mr. Daintreo observed, at Mount Wyatt Diggings, certain slates and 
Z,g •Containing Ohonetes sarcinulala, an Orthis allied to 0. rusiiaa, ddeceptaculites, and 
laid K "letermiiied by Sir F. McCoy. These rocks were unconformably over- 
of th ^ probably of the “ Star” Series, containing Lepidodendron. On the strength 
assi ^ the strata first alluded to were assumed to be of Upper Silurian age. The 
sar ^as based on a single distinctly specifically determined Brachiopod, Chonetes 
ai|ipT**^^^*> caow known to range upward into Devonian times, an Orthis, which might be 
aH Upper Silurian species, without being itself of that age — the genus ranging 
(Sih Silurian, Devonian, and Carboniferous — a Heceptaculites* and a Leptcena 
fho Devonian) not specifically determined. I have not been able to identify 
I’eferred to by Mr. Daintree, but as I observed both the Star Beds and the 
beloj,'^'® injjthe neighbourhood, I think it probable that the Chonetes, &c., be s 
'~~-_i^^^_thetoer. 
been made, both in London and Briabane, to trace this fossil but without success. 
