244 C. A. SUSSMILCH. 



outcropping on the Nowendoc road, where it immediately 

 underlies a bed of conglomerates. A similar crinoidal lime- 

 stone outcrops on the stock reserve about two miles out 

 from Gloucester, on the Taree road. Its position here is 

 probably due to faulting. What is probably also the same 

 limestone bed outcrops strongly in Tugrabakh Creek, near 

 Brushy Mountain, about six miles from Gloucester. Here 

 fossil corals (Zaphrentis) are associated with the crinoids. 

 The second limestone bed outcrops strongly on the Oope- 

 land road, close to its junction with the Nowendoc road 

 (Portions 33 and 35, Parish of Pitzroy). It is a dark, com- 

 pact limestone, oolitic in places, and apparently devoid of 

 fossils. It is upwards of 60 feet in thickness, and has been 

 observed at intervals for several miles to the south (Port. 

 29 P. of Fitzroy and Port. 85 P. of Verulan). The third 

 bed of limestone is also oolitic, and has so far yielded no 

 fossils, it outcrops on the Oopeland road, half a mile east 

 of Barrington village. 



These limestones are for the most part impure, as may 

 be seen from the following analyses. In places they are 

 tuffaceous, and regular bands of lapilli can be seen in them* 

 These analyses have been taken from Mr. J. E. Game's 

 work on "The Limestones of New South Wales," (Mineral 

 Resources of N. S. Wales, No. 25). 



Crinoidal Limestone (No. 1 bed) CaCo 3 



Stock Reserve, two miles 



from Gloucester ... ... 79-68 



Ditto, ditto 99-17 



Tugrabakh Creek, 6 miles from 



Gloucester 89-30 1-56 1-35 7-75 



No. 2 Limestone Bed (Por. 33 



35, Parish of Fitzroy) ... 68-81. 1-68 1-86 26-34 



(d) The Tuffs, — These are for the most part fine grained, 

 and are interstratified with the mudstones. They have 





F203 





MgCo 3 



and 



Al 203 



Gangut 



0-97 



2-28 



15-79 



trace 



0-36 



0-56 



