342 Mr. Winch on Specimens of Rocks, fyc. [May, 



are found on stony plains, and it is used as mill stones in the 

 colony. 



From Neio South Wales. 



1. Coal, resembling that of the north of England. • 



2. Coal shale, of an ash-grey colour, with impressions of the 

 leaves of some phamogamous plant, probably an eucalyptus. 

 These leaves are lanceolate, from four to six inches in length, 

 by one or one and a half inch in breadth, and have left black 

 impressions on the stone. 



3. Wood, mineralized by silex ; the interior of a dark-brown 

 colour, and compact texture, the exterior, formed on the sap 

 wood, pale-brown, and containing longitudinal pores. 



4. Old red sandstone, of a dark reddish-brown colour, and 

 made up of small grains of sand, and silvery mica, and envelop- 

 ing rounded pebbles of white quartz. Pitt's Amphitheatre. 



5. Greywacke, consisting of greenish-grey clayslate, inclosing 

 small fragments of chesnut-brown flinty slate, and specks of cal- 

 careous spar. From the hills beyond Bathurst. 



fj. Chlorite slate, of a greenish-grey colour and silky lustre. 

 From the same hills. 



7. Gneiss, composed of white felspar, black mica, and glassy 

 quartz. From Cox's river. 



8. Granite, consisting of fine grained white felspar, glassy 

 quartz, and silvery mica. Near Cox's river. 



9. Large grained granite, chiefly composed of flesh-red felspar, 

 with glassy quartz and silvery mica. From Lawson's Peak, 

 beyond the Blue Mountains. 



10. Epidote, of a pale-green colour, and granular texture. 



11 . Felspar porphyry, of a yellowish and greenish-white, with 

 crystals of the same colour, mixed with opalescent quartz. 

 Fragment of a rounded mass. 



12. Rock crystal, six-sided prismatic crystals, of a smoke- 

 grey colour, terminated by six-sided pyramids. 



13. Clay ironstone, of a reddish-brown colour, in nodules. 



14. Bog iron ore, of the same colour. 



15. Bole, of a bright-red colour. 



16. Iron pyrites. 



From the examination of these minerals (provided the series 

 be complete), the conclusions to be drawn are, that, with the 

 exception of the diluvium, no formation more recent than our 

 magnesian limestone, has been found in Van Dieman's land, or 

 our coal formation in New South Wales. That the mountain 

 limestone, old red sandstone, greywacke, porphyry, clayslate, 

 chlorite slate, gneiss, and granite, follow each other in the same 

 order of succession, as is the case in other parts of the world ; 

 that no pumice or recent lava have been detected ; and that the 

 most remarkable phenomenon is the existence of impressions of 

 leaves of phaenogamous plants in the shales. 



N.J. Winch. 



