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Karst Geomorphology and Microclimatic Refugia in Tsingy de Bemaraha
Located in western Madagascar, the Tsingy de Bemaraha Strict Nature Reserve preserves one of the most spectacular karst landscapes on Earth. The Malagasy term tsingy translates roughly as "where one cannot walk barefoot," a vivid reference to the dense forest of razor-sharp limestone pinnacles that dominate the terrain. This geological labyrinth originated during the Middle Jurassic epoch, when extensive marine deposits of calcium carbonate accumulated along ancient shallow seaways. Following subsequent tectonic uplift, intense tropical rainfall permeated vertical fault lines, initiating millions of years of chemical weathering. As carbonic acid dissolved the carbonate bedrock along intersecting fractures, subterranean drainage carved deep fissures, ultimately leaving behind towering needle-like lapiez formations up to one hundred metres in height.
This extreme vertical dissection produces dramatic microclimatic stratification between the pinnacle peaks and the canyon floors.