574 GREAT SERPENTINE BELT OP NEW SOUTH WALES, ii., 



probably not all exactly on the same horizon, they are mostly 

 confined to a narrow zone, while those apparently out of the 

 zone, may, in some cases, be displaced by faulting, though this 

 explanation will not hold for all. A brief description of several 

 occurrences, commencing from the north, must now be given. 



North of Black Jack, a red and white crystalline limestone 

 occurs, and passing below the basalt cap, continues to the south. 

 It forms two bands about 80 yards apart. On crossing Cope's 

 Creek, it is thrown westwards by a small fault, but thence con- 

 tinues southwards, reaching a maximum thickness of over 50 

 yards, pinching out after about a mile. It is remarkable for its 

 brecciated character, being composed of angular fragments of 

 red, pink, and cream-coloured limestone, cemented with white 

 calcite. It takes a high polish, and makes a handsome stone. 

 Numerous crinoid-stems are present, but recognisable fossils are 

 few. 



At the east of the southern end of this, is a band, about 50 

 yards wide, of grey limestone much mixed with tuffaceous 

 material and sediment. The patch is about half a mile long, and 

 contains numerous, determinable fossils. About a mile to the 

 south of this, is a pair of lenses of limestone, one of which forms 

 a small bluff by the creek. It is of a brecciated character, and 

 no determinable fossils were found. South again, and west of 

 the general horizon, are two small lenses of grey, non fossiliferous 

 rock, one on a hilltop north of Hyde's Creek, the other north of 

 Cann's Plains Creek. It is hardly likely that they are faulted 

 repetitions of the main horizon. One mile to the east of the 

 last, are two fossiliferous lenses occurring in the saddle by the 

 old Phoenix Mine. Half a mile east of these, is a small lens near 

 the river, opposite Warden's Farm, with traces of fossils, which 

 is probably on the same horizon as the fossiliferous rock by 

 Tongue's house, on the river to the south. This is a coarse, 

 tuffaceous breccia, with large fragments of limestone, one of 

 which contains Phillipsastrcea. 



South of Cann's Plains Creek, and again on the general 

 horizon, are situated the limestone quarries by Bowling Alley 

 Point. It is a fairly pure, grey stone with a few fossils, about 



