Fig. 3. 



Basal!- 



lncb & Fish Remains 

 7 ^./ 



Terhary Deposits 



Ipswich Coal Measures 



Diagrammatic Section south of Goodna. 



Showing the Tertiary Shales and Sandstones resting on the Ipswich 



(Triassic) Coal Measures. 



The strata in this vicinity consist of clay shales, black fissile 

 shales and sandstone, occurring as a thin superficial deposit resting 

 on the irregular surfaces of the Ipswich Coal Measures and Bundamba 

 Sandstones. They have 110 possible geological connection with the 

 Triassic beds which yielded the insects at Denmark Hill, and are a 

 Tertiary deposit. 



DUARINGA. 



In the year 1900 boring operations for coal were carried out at 

 Duaringa, within half a mile of the station of that name, and 65 

 miles by rail westerly from Rockhampton on the Central Railway 

 line. 



The specimens described by Mr. Tillyard from this locality 

 were found in one of the core pieces by the late Mr. T. Coventry, 

 who had them in his possession for some considerable time. 



The bore was sunk to a depth of 600 feet, and the material 

 from the bore indicated that the coal measures, the testing of which 

 was the object in view, had not been met with at that depth. This 

 was considered to be rather unexpected, in view of the coal measures 

 being known to exist both to the east and west of the bore. 

 Apparently, a narrow valley has been excavated out of the eld 

 land surface of the coal measures and possibly formed a river 

 channel, subsequent to which the area became submerged to much 

 below sea-level, the subsidence of the land and the deposition of 

 the freshwater sediments being synchronous. 



The cores from the bore consisted almost entirely of bluish and 

 buff-coloured clays and shales, with occasional bands of lignite. 



