BY. E. O. MARKS, B.A., B.E. 97 



writer did not follow the river further than about 6 miles 

 below the falls, but noticed in one place that the river is 

 • divided by an island some 150 feet in height. 



It is to be pointed out that the falls total between 

 100 and 150 feet, while the mountains and hills on either 



-vside of the river are of much greater elevation than that 

 part of the peneplain immediately to the west. Thus 

 at the Suttor confluence the elevation is approximately 

 350 feet above sea level, while the hills on either side of the 

 gorge rise to elevations of 800 feet near the start and over 



'1500 feet lower down the river. 



Two creeks joining the river in this part of its course 

 pass through gorges before doing so. One of them, Stones 

 Creek, has the upper part of its course mainly in undulating 

 granite country. Of the remainder of its course, part is in 

 fairly open country composed of purplish felsitic tuffs and 

 lavas, while the part nearer the Burdekin, where the rocks 

 are similar to those of the Burdekin gorge, lies also in an 

 ; almost impassable gorge. 



The belt of country formed by the felsitic rocks prac- 

 tically constitutes the Leichhardt Range between the Burde- 

 kin Falls and Ravenswood. The country is exceedingly 

 hilly, but the hills are rounded and with the exception of 

 Mt. Bluey, as it is known locally, or Mt. Glenroy, as it is 

 named on the maps, do not form prominent peaks above 

 the general level of the range. The creeks occupy steep- 



^sided V-shaped valleys often difficult to travel along. 



At the heads of Glenroy and Stones Creeks areas of 

 granite are marked by the change to the more undulating 

 topography, that at the head of Glenroy forming a table- 

 land on the divide, a tableland from which the creek 



.descends in a waterfall of 300 feet over exceedingly hard 

 granite. 



Perhaps the most interesting example of contrast 

 in topography between the two types of country, occurs at 

 Plumtree Pocket, about 4 miles south-east of Ravenswood. 

 This pocket is almost entirely surrounded by rounded 

 hills or felsitic rocks traversed by narrow V-shaped valleys. 

 The pocket itself, some 500 feet below the summit of the 

 hills, is approximately 3 miles long by 1 mile wide and is 

 'Of the usual undulating granite country, almost if not 

 .G 



