368 



GREAT SERPENTINE BELT OF NEW SOUTH WALES, Vll. 



The following- analj^ses, generously contributed by Mr. J. C. H. 

 Mingaye, F.T.C., F.C.>S., show the composition of this rock, and 

 also that of the dolerite with basic felspars. 



No. 1387 — Dolerite with hypersthene and basic felspar. Portions 24, 35, 

 Parish of Loomberah. 



No. 1407 — Porphyritio Dolerite, Portion 59, Parish of Loomberali. 



These analyses should be compared with tliose given on page 602 

 of the fifth paper of the present series (6). 



No. 1416, from Portion 32, is very similar in general eliaraeter 

 to No. 1407, though rather more decomposed. The presence of 

 chlorite replacing the inner portion of a zoned plagiochise-pheno- 

 cryst is a noteworthy feature. 



What appear to liave been originally similar rocks, thougli now 



