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PINNACLE SYNGENETIC KARST IN NAMBUNG NATIONAL PARK, WESTERN AUSTRALIA
Matej LIPAR - (38/1,2009)
Simultaneous karsti"cation and lithi"cation of aeolian calcarenite in the southwest coastal part of Western Australia produced syngenetic karstic geomorphological features, such as solution pipes, maze caves, collapsed dolines and pinnacles. $e formation of these geomorphological features was greatly in%uenced by the poor cementation and matrix porosity of the calcarenite. Pinnacles, calcarenite pillars up to 5 metres tall with one or more peaks and various types of sediment layers, are most numerous and densest in an area called $e Pinnacles in Nambung National Park, Western Australia. $eir detailed characteristics and origin are still partially unknown and controversial. $eories suggest that the pinnacles are the "nal product of one or more of corrosive expansion and coalescence of solution pipes, cemented sediment surrounding the roots, cemented "ll of solution pipes, products of focused cementation or remainders of tree-trunks. $is article presents descriptions of pinnacles in Nambung National Park based on my "eldwork and suggests a polygenetic origin for the pinnacles, with roots playing a major role. $e genesis of pinnacles is far more complex than the theories presented so far.
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