. The commonwealth of Australia; federal handbook, prepared in connection with the eighty-fourth meeting of the British association for the advancement of science, held in Australia, August, 1914 . et elevation extending from the volcanics of the Canobolas (near Orange)to the great Blue Mountain scarp behind Sydney. It is bounded on the southby another broad gap—the Lake George geocol. • Geocol is a word coined to express a col or gap on so large a scale that it influences rainfall,vegetation, and communications. Physical and General Geography of Australia. 93 In the south is a pair of massifs
. The commonwealth of Australia; federal handbook, prepared in connection with the eighty-fourth meeting of the British association for the advancement of science, held in Australia, August, 1914 . et elevation extending from the volcanics of the Canobolas (near Orange)to the great Blue Mountain scarp behind Sydney. It is bounded on the southby another broad gap—the Lake George geocol. • Geocol is a word coined to express a col or gap on so large a scale that it influences rainfall,vegetation, and communications. Physical and General Geography of Australia. 93 In the south is a pair of massifs exceeding 7,000 feet in the south-westseparated from each other by the long narrow valley of the middleMurrumbidgee. But the most striking feature is the presence of the great coal-measurebasin or geosyncline which centres at Sydney and extends north for 200 milesto the Liverpool Eanges, and south for 100 miles to Moruya. Two greatbeds of payable coal (the Newcastle and Greta seams) extend under a largeportion of this area, like two black saucers whose eastern rim has beentruncated by the faulted sea coast. /. unefer IOOOF!-. .. /ooof^f to zooon ZOOOF!^ to 3000F! oyer 3000 Fig. 5.—Map of the main orographical features in South-Eastern Australia, showing tnofive gcocols or breaks in the Cordillera at (1) Cassilia, (2) Lake George, (3) Cooma,(4) Omeo, and (5) Kilmore. The white western area is less than 1,000 ft. in elevation. The effect of this geosyncline on the topography is not, however, somarked as. might have been expected. Not only the coal-measures (of 94 Federal Handbook. Permo-Carboniferous age), but also earlier and later deposits have participatedin the far-reacliing coastal movements of Tertiary times. On thewhole, we may describe the Cordillera region here as having a gentle slope
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