Cave systems in reef limestone and calcarenites of late Cretaceous age in the Crags of Garagartza and contiguous outcrops: Crag of Naparraitz and Orobe Mountain.
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This paper describes a set of natural cavities, located in litosomes of reef limestones and calcarenites, which form a W-E band extending about Southern Gipuzkoa end (Otzaurte-Altzania region) for penetrating Navarra (Orobe limestone mount, NW Alsasua). The age of these rocks is Cenomanian (Late Cretaceous). The top of the outcrops form prominent crags which constitute residual relief bluffs. In them there are cave systems which are witnesses of a paleokarst, rejuvenated and partially stripped of their sedimentary fills by the current karst cycle. Accessible caves show features of a long polyphase evolution, with successive phases of speleogenesis, conduits clogging, re-excavation, formation of speleothems, surface erosion and sinking of the underground drainage, to its current configuration. Accessible caves have sets of cave fauna, with endemic troglobitic species of these outcrops and other features of paleontological and anthropological interest. The paper describes the caves studied on the Crag of Paparraitz (the easternmost of the Crags of Garagartza, Gizpuzkoa) and comparable examples of the top of Mount Orobe (Navarra).
Speleology, Karst, Caves, Underground biology, Paleokarst, Hydrogeology, Anthropology, Palaeontology
Spanish and English
Galan, Carlos; Rivas, Jose M.; and Nieto, Marian, "Calcarenitas De Edad Cretácico Tardío En Las Peñas De Garagartza Y Afloramientos Contiguos: Peñón De Naparraitz Y Peña De Orobe. Cave systems in reef limestone and calcarenites of late Cretaceous age in the Crags of Garagartza and contiguous outcrops: Crag of Naparraitz and Orobe Mountain." (2014). KIP Articles. 568.