
If you go to Atlas of the Great Caves and the Karst of Africa (2nd ed., 2008), edited by Michael Laumanns and published as volume 30 in Berliner Höhlenkundliche Berichte, and look up Swaziland (p. 403-404), all you get is “Crystalline basement rocks of Precambrian age underlie most of this small country. These are overlain […]
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