page_title: Gurio Lamanna
section_title: Origin and evolution
hierarchical_section_title: Gurio Lamanna / Origin and evolution
caption_attribution_description: English: Gurio Lamanna - Sketch of the drainage basin of Gurio Lamanna
context_page_description: Gurio Lamanna is a doline shaped like a coat of arms located in the Murge plateau and falling into Gravina in Puglia's territory, on the border with Altamura, Apulia, southern Italy. It is "one of the largest karst landforms of the Murge plateau" and it is located very close to other two dolines, namely Pulicchio di Gravina and Tre Paduli. Depending on the type of geomorphologic classification employed and the author who suggested it, the karst landform can be defined either a doline or a "karst basin". It is traditionally called "karst basin", following the suggestion of Carmelo Colamonico, who first studied the doline and saw in its large size and shallow depth a good reason to distinguish it from a normal doline. The definition of "karst basin", used by Carmelo Colamonico, has been introduced by Renato Biasutti. Carmelo Colamonico stated that Gurio Lamanna is "one of the best examples of karst basin in the Murge plateau".
context_section_description: The origin of the karst basin Gurio Lamanna can be explained with karst processes. The water coming from the relative drainage basin has slowly but constantly eroded (according to the usual double action - chemical and mechanical - of rainwater, typical of karst phenomena) the area, leading to the formation of the wide flat area full of fertile soil that is visible today.
  Carmelo Colamonico hypothesized that, initially, there may have been a ditch in direction NW-SE caused by tectonic phenomena. Nevertheless, he noticed that today's dimensions would have never been reached if there had not been the double action of rainwater coming from such a large drainage basin (karst).
  Rainwater mainly comes from two lamas, one located NW  and the other NE. Both of them contribute to the erosion phenomenon, although the NW lama probably contributed (and still contributes) more than the NE lama. The erosion occurred (and still occurs) mainly in the northern direction in the region between the two lamas.
caption: Sketch of  the drainage basin, whose endpoint (lowest point) is Gurio Lamanna
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