138 GEOLOGY MAITLAND-BRANXTON DISTRICT, 



brachiopod, Strophalosia. The following is a list of fossils from 

 the M uree Stage : — 



Zaphrentis phymatoides. Spirifer stutchburii. 



Phialocrinus princeps. S. duodecimcostata. 



ArchcBOcidaris. Martiniopsis cyrtiformis. 



Stenopora crin ta. M. oviformis. 



Vroloretepora. Strophalosia clarkei. 



Dielasma biundata. S. gerardi. 



D. amygdala. Conocardium australe. 



D. cymboeformis. Deltopecten leniusculus. 



D. hastata. Mazonia fragilis. 



Productus brachytharus. M. carinata. 



Spirifer convoluta. Entomi* jonesi. 



S. clarkei. 



One of the best exposures of this Stage is in the vicinity of 

 Mt. Vincent, just east of Mr. Charles Wyndham's residence at 

 Wollong, at the place known as " Bow Wow." Here the Muree 

 Beds weather into large caves or rock-shelters, where numerous 

 fossils can easily be obtained. 



Above the Muree Stage comes the Crinoidal Stage. This 

 varies very considerably in thickness in places, having a minimum 

 of about 1,500 feet, and a maximum of from 3,000 to 4,000 feet. 

 For the most part, it consists of fairly soft shales and mudstones. 

 These weather fairly readily, and in this lies the reason for the 

 development of some of the extensive alluvial Hats, e.g., along the 

 course of the Mulbring or Wallis Creek. For the same reason, 

 good outcrops are not of as frequent occurrence as they are in 

 the more resistant beds. They can be seen outcropping, how- 

 ever, near Mt. Vincent, and in the railway-cuttings and creeks 

 to the west and south of Belford. In places, they contain small 

 and large erratics; e.g., where the old line of northern road 

 crosses a small creek in portion 61, Parish of Rothbury, there are 

 numerous, small erratics of such rocks as aplite, quartz-porphyry, 

 quartzite, and fine-grained, black, basaltic rocks. A little 

 further east, where the same road crosses Jump Up Creek, there 

 are a number of large erratics, an aplitic one reaching quite three 

 feet in diameter, and one about the same size, of coarse granite, 



