74 COALFIELDS AXD COLLIERIES OF AUSTRALIA. 



0. The Henty basin, on the west coast. Here there are 

 some insignificant seams, too small to work. 



The Mesozoic coal is generally referred to the Trias-Jura. 

 The coal is used for steam and domestic purposes. 



1. Fin gal coal basin. The two largest collieries in Tas- 

 mania are in this basin, viz., the Cornwall, with an output 

 during 1909 of 29,885 tons, and the Mt. Nicholas Colliery, with 

 an output of 27, -341 tons. The Mt. Nicholas seams are four to 

 nine feet thick. The Jubilee seam, 7ft. thick, on Mt. Nicholas, 

 is not being worked now; the above thickness includes about 

 18in. of partings. 



2. Ben Lomond. Two seams are found at Mt. Rex, one 

 6ft. to 7ft. thick, the other 12ft. thick, including five bands 

 aggregating 9Jiii. This field is not worked. 



3. Thompson's Marshes coal basin. This is really a con- 

 tinuation of the Fingal basin from the north, and the 

 Douglas River basin from the south. Three seams have been 

 discovered at Thorndale, but are not being worked. The 

 lowest seam measures 2ft. Sin. to 2ft. 7in. thick, and con- 

 tains a half-inch parting. The coal is black and dense, with a 

 dull lustre, and is free from pyrites. The intermediate seam 

 is a twin, the upper portion being separated from the lowei 

 by a band of clay 4ft. 5in. thick; the top coal measures 5ft. 

 7in., and the lower 4ft. 9in. ; the ash is high, and the coal 

 shows efflorescence of sulphate of iron. The upper seam 

 measures, as far as exposed, 4ft. 2in. ; it is not such good 

 coal as the other two seams. 



4. Douglas River and Llandaff basin. The seams are 

 found from 2 to 10ft. thick, of fair Tasmanian quality; but 

 they are not being worked, mainly owing to the want of 

 facilities for fetching the coal to the coast, where there is a, 

 suitable harbour in Cole's Bay, the water being 6 to 14 

 fathoms deep. This coal-field is about 11 miles long by two 

 miles wide. 



5. York Plains basin. A semi-anthracitic coal is being 

 worked here from a four-foot seam. 



G. Colebrook basin, formerly known as Jerusalem. The 

 mines are now idle. 



7. Sandfly basin. The seams are four and five feet thick; 

 some of the coal is semi-anthracitic. This is an important 



2. W. H. Twelvetrees, on Coal at Mount Rex, 1905. By 

 authority. 



3. W. H. Twelvetrees, Report on Coal Seams at Thorn- 

 dale, near Thompson's Marshes, and the Jubilee Colliery, near 

 St. Mary's, 1901. By authority. 



4. W. H. Twelvetrees, Report on the Coal-field of Llan- 

 daff, the Denison, and Douglas Rivers, 1901. By authority. 



7. W. H. Twelvetrees, Report on the Sandfly Coal Mines, 

 1903. By authority. 



