Geological Features of the Transvaal, South Africa
Geological Features of the Transvaal, South Africa
Alford, Charles J. (Charles John)
The book Geological Features of the Transvaal, South Africa was written by author Alford, Charles J. (Charles John) Here you can read free online of Geological Features of the Transvaal, South Africa book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Geological Features of the Transvaal, South Africa a good or bad book?
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The sandstones of the coal formation form flat^ topped or but slightly rounded hills, generally not of any great height individually, though that formation occupies the highest parts of the country. The stratified quartzites with their attendant conglomerate beds form bold escarpments with intervening deep ravines. The schistose rocks, underlying the harder quartzite beds, present themselves in the lower slopes and foothills of the mountains, in flat beds on the surface of the granitic rocks, a...nd where thrown up into a vertical position and supported by the more durable beds of compact quartzite, in steep-sided but rounded mountains. The granites can be readily recognised by the immense rounded blocks piled one upon the other, or showing their curved surfaces from beneath the surface sands and soils. The trappean inruptive rocks form sharp and very distinct ridges, and in places cover the surface of the ground with blocks and boulders, showing a very characteristic conchoidal or egg-shaped weathering.
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