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15 de Julio

A fenced pit about 50 metres deep and 16 metres in diameter, opened at the crossing of two faults between Aldaon and Irumugarrieta, with great cavern development and airflow.

Araitz 135m 118m

A fenced pit about 50 metres deep and 16 metres in diameter, opened at the crossing of two faults between Aldaon and Irumugarrieta, with great cavern development and airflow.

Caratteristiche

Località

Following the path marked with red dots that leads to the summit of Irumugarrieta, one crosses a fence which the path follows. This point is close to Irumugarrieta and from it Aldaon can be seen looking towards the N-E. Between these two mountains, Aldaon and Irumugarrieta, a valley is formed that opens towards the Mailoa. At the lowest point of this valley the fenced pit opens. Although it lies 30 metres inside Guipozkoa, it is listed for its proximity and possible interest.

Mappa

Ingressi

Verifica sempre le coordinate e le condizioni di accesso prima di partire.

  1. 15 de Julio

    Quota: 1300 m

    43.002251, -2.029047
    UTM 30T (ED 50) 579245 4761731
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Descrizione

Morfologia

At the lowest point of the valley a fenced pit opens, about 50 metres deep and 16 metres in diameter. It is a cavity opened at the crossing of two faults with NW-SE and SW-NE directions. This cavity shows great cavern development. The dimensions and morphology of the cavity denote an importance within the underground network that has drained this area during the cold periods.

Idrologia

This cavity may have functioned as a glacial-type drain for the small basin formed between the summits of Aldaon and Irumugarrieta.

Altri dettagli

The chances of a shaft opening in the block chaos that collapses it are high, since this cavity shows great cavern development as well as airflow. A very interesting cavity, since despite being closed between blocks it has airflow.

Storia

2007 Research Aralar G.E.E

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Fonte: Gobierno de Navarra – Catálogo espeleológico de Navarra (datosabiertos.navarra.es), modificato. CC BY 4.0, https://creativecommons.org/licenses/by/4.0/ Gobierno de Navarra · dati aggiornati a 2022