698 GREAT SERPENTINE BELT OF NEW SOUTH WALES, vi., APP., 



kin Homestead, soutli of Attunga Creek, similarly is a strongly 

 compressed fold, apparently a syncline, in whicli the limestone 

 must be not less thick than the above. Faulted against this, on 

 its nortli-western side, is a mass of claystone and limestone (60 

 feet thick of pure limestone, above 70 feet thick of siliceous 

 limestone dipping E.IST.E. at 10°). The very irregular outline of 

 the masses of limestone north of Attunga Creek, the mapping of 

 which is due to Mr. L. J. Jones, suggests that a similar com- 

 plexity of tectonic structure prevails here. This is confirmed 

 bv the extraordinarily disturbed character of the sediments on 

 Yarrambully Creek. Tlie following fossils have been obtained 

 from the Attunga limestones by various collectors,* the deter- 

 minations being due to Mr. W. S. Dun, for the most part(4, 5). 

 Tryplasma, sp.n. Actinocystis corwiLbovis. 



CyathophyUum, sp.n. Aulopora sp. 



Phill ipsastrcea sp.n. Microplasma paraUelum. 



Litophyllum Konincki. Litophyllnm, sp.n. 



Heliolites porosa. Syriiigopora auloporoides. 



Syringopora, sp.n. Favosites gothlaiidica. 



Favosites multitahidala. Pentamerus cf. Knightii. 



Chonetessp. Attypa sp. 



Euomphalus sp. Crinoid ossicles. 



Unfortunately, the exact localities from which these fossils 

 were derived are not known to the writer; the majority are not 

 frequently found in Moore Creek limestone, to which must belong 

 the bulk, if not all, the masses of limestone. The presence of 

 rhiUipsastrcHa, Tryplasma sp., and F. multitahulata suggests 

 that the Loomberah limestone may also be represented. If this 

 be so, we may have here an opportunity of checking the present 

 tentative assumption that the Loomberah limestone is strati- 

 graphically intermediate between the Moore Creek and Nemingha 

 limestones, though nearer to the former. It should be noted 

 that, in one place at least, namely on the top of the hill behind 

 the Burdekin Homestead, the limestone of the Moore Creek 

 horizon is brecciated, and set in a red matrix, in a manner pre- 

 viously l)elieved to be confined to the Nemingha limestone. For 



* W. Anderson, M. Aurousseau, J. Campbell. C. Cullen. R. Etheiidge, 

 D. Porter. 



