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Problems: rubbish dumping and exotic pine plantations. Mt. Gambier area, SA 5L136.jpg |
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Quarry for building stone. The soft Gambier Limestone is easily sliced up into blocks. Note the soil profile (epikarst) in background, with solution pipes C9905_03.jpg |
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A small stone pit in Gambier Limestone, now used as a sunken tennis court! IMG00069.jpg |
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Rhizomorphs: calcareous concretions formed about roots. These are common in syngenetic karst. IMG00064.jpg |
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Subsoil karren pavement exposed by soil erosion. Mt. Salt area, SA IMG00067.jpg |
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Small pan formed in surficial sediments overlying limestone. Naracoorte area, SA IMG00120.jpg |
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Naracoorte Plateau. Lake Penzance is a permanently flooded uvala D042390.jpg |
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Gordon Lagoon, Naracoorte Plateau, SA. The main uvala used to drain each dry season, but the "Runaway holes" have been blocked with sediment and it is now a permanent lake - as shown by the dead trees. D042239.jpg |
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| Two views of Millinger Swamp, near Naracoorte, SA The left photo, taken during the wet season, shows the forground doline flooded along with the rest of the swamp, in the right hand photo (dry season), this has been blocked off and is empty. The forground doline drains down to the regional water table, while the background lagoon is a pearched lake, sitting on impermeable sediments. The barrier is artificial - orignally the swamp drained completely each dry season. Now it is a permanent waterhole and the flooded trees have died as a result. IMG00111.jpg & IMG00124.jpg | |
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Bool Region, SA. Shallow depressions that are polygenetic (karst and deflation). Note lunette ridges on side of left-hand hollow. D042428.jpg |
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| Surface fretting and meso-voids (secondary solution porosity) in a cliff outcrop of the Tertiary Gambier Limestone. The Up-and-down Rocks, Tantanoola, SA Stereo-pair. View cross-eyed. - Scale is 10cm. IMG00121.jpg & IMG00122.jpg |