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Unabraded fragments of trap are not uncommon in the soil of these plains, and I imagined there was a want of symmetry in the hollows and slopes as compared with features more closely connected with hills elsewhere. At 8 1/2 miles, perceiving boundless plains to the northward, I changed the direction of our route 24 degrees east of north.
Professor Ramsay, after acquiring an intimate knowledge of the glacial phenomena of the British Isles, had taught many years before that small tarns and shallow rock-basins such as we see in many mountain regions owe their origin to glaciers which erode the softer rocks, leaving the harder ones standing out in relief and comparatively unabraded.
I soon came to undulating ground or low hills of quartzose gravel without any grass, consisting of unabraded small angular fragments of quartz. I observed a few trees of the ironbark eucalyptus and pines or callitris on the highest grounds.
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