106 VOLCANIC AREA OF EAST MORETON, ETC., DISTRICTS, Q., 



I have to acknowledge the kindly interest taken in this work 

 by Mr. Dunstan, the Acting Government Geologist of Queensland, 

 and Professor David, of the Sydney University. For assistance 

 in the field I am indebted to Mr. W. Fawcett Story of Coolum, 

 and to Mr. Pickering, Police Sergeant at Tewantin. 



Part ii. Petrology. 



In this Part the rock slides examined under the microscope 

 will be dealt with in the same order as the field occurrence of 

 the rocks as described in Part i. of this paper (see Synopsis). 



As the specimens were numbered in the order in which they 

 were obtained in the field, no numerical succession must be 

 expected in the order in which they are dealt with. 



In the description of igneous rocks the following conventions 

 are observed. First the handspecimen is briefly described; next 

 follows the microscopic examination. The latter comprises a 

 description under the following headings :— (1) Texture, which 

 is dealt with under the subheadings of (a) Crystallinity. (6) 

 Granularity and grain-size, (c) Fabric. This order is adhered 

 to in the descriptions whether the subheadings are mentioned 

 or not. 



(2) Constituent minerals in order of decreasing abundance. 

 These are, when advisable, divided into — (a) "essential ' minerals 

 existing in an amount greater than 10%; (b) "notable" minerals 

 greater than 5%; (c) "diminutive" minerals greater than 2%; 

 (d) "minute" minerals less than 2 %. The accessories are there- 

 fore comprised under the heading "minute." 



(a) Metamorphic Rocks. 



Sp. No.61. Cyanite-Kutile Granulite. Loc. : Delaney's Ck. near 

 Woodford (Plate xi., fig. 1). 



i. The handspecimen is of a yellowish colour, has a character- 

 istic schistose structure, and looks like a typical mica-schist 



ii. Microscopic Examination. — (1) The rock is noncrystalline; 

 grain-size variable; fabric schistose. 



