Notes on the Geology of the Country around Goulburn. 57 



Aet. VI. — Notes on the Geology of the country around Goulburn, 

 by Alexander M. Thompson, Esq. D. Sc. 



[Read before the Society 5th. August, 1869.] 

 The notes now laid before the Society were originally intended 

 to form part of a paper on the geology of the entire County of 

 Argyle, N.S.W., in the centre of which the city of Goulburn is 

 situated. ; but as I have not yet examined a portion of the north, 

 though tolerably acquainted with the other parts, I have limited 

 it to the geology of the country around Groulburn, meaning, 

 however, to include all the portions of the County of Argyle 

 which I have visited. 



The map of the county of Argyle exhibited is coloured geo- 

 logically as far as my trips have extended, so as to show at a 

 glance the portions referred to. In starting it may be as well to 

 mention that the information embodied in the coloured map was 

 arrived at by making traverses across the country in various 

 directions ; (the principal of these are shewn on a second map). 

 By drawing lines to connect the rocks of similar character met 

 with in contiguous routes spaces are thus inclosed which repre- 

 sent in a rough manner the areas of the different formations. 



Though these boundaries have not been surveyed, yet they 

 have been sketched in with judgment and care ; and while 

 enjoying the hospitality of the inhabitants in many parts, I 

 availed myself of their information to fill in the map. And for 

 assistance in this way, I. would particularly acknowledge my 

 obligations to Mr. Edgar Deane, who is the surveyor in the 

 county, and is intimately acquainted with every corner of it. 

 These circumstances render it unlikely that any important feature 

 has been lose sight of in the spots not act ally visited. 



The greatest care has been taken in assigning the positions of 

 the outcrops of limestone, which are shown as accurately as the 

 small scale admits of. The map will be found in accordance with 

 what has been already published on this subject by others ; 

 Strzelecki in his work on New South Wales makes allusion to 

 several points in the geology of this county, but he does not enter 

 into details. It is, however, to the renowned and indefatigable 

 geologist, our esteemed vice-president, the Eev. W. B. Clarke, 

 that we already owe an acquaintance with its geological structure. 

 Not only has the general nature of the whole been described in 

 i 



