BY T. STEPHENS. 757 



There is also an outcrop of granite which does not occur else- 

 where so near the coast. 



[For information as to the occurrence and exploitation of ore 

 bodies south of the coast-line between Ulverstone and Emu. Bay, 

 reference must be made to the Report of Mr. Twelvetrees, 

 Government Geologist, "On North- West Coast Mineral Deposits," 

 dated 26th July, 1905, which gives in full detail all that is 

 known of the present and prospective development of the mineral 

 industry in this part of Tasmania.] 



Emu Bay to Table Cape. (Plate xxviii.). 



The shore-line above high-water mark between the River Emu 

 and Burnie is occupied by sands and gravels backed, for. the most 

 part, by steep basaltic rises. In one place about 100 feet above 

 sea-level an exposed gravelly patch showed waterworn boulders 

 of quartzite which might possibly be of glacial origin. At low 

 tide may be seen a series of alternating bands of hard sandstone 

 much jointed, clay slate, and quartzite, striking east of north, 

 and disappearing under the town of Burnie, and the low basaltic 

 ridge of Blackman's Point (Plate xxv.,fig.l), where are large 

 exposures showing the typical columnar structure of the rock. 

 At the farther end of the next beach, half a mile west of the Point, 

 the old rocks again crop out. They comprise hard flaggy sand- 

 stones and grits with softer schistose bands. They have a general 

 strike to N.N.E., and are highly inclined, showing here and 

 there very symmetrical anticlinal folds, but the crown of the arch 

 is continuously being removed in most instances by the wash of 

 the sea. Interbedded with these bands all the way from West 

 Beach to Cooey Creek are massive dykes of an igneous rock of a 

 gabbroid character. They are distinctly intrusive, and, besides 

 the usual alterations which are seen in such cases on lines of 

 contact with sedimentary rocks, the latter have sometimes been 

 contorted into most fantastic folds. 



From Parish's Boat Harbour to the River Cam the outcropping 

 rocks are mostly hard altered sandstones and slates greatly 

 foliated on the line of strike, and so much jointed that the lines 

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