This crater is located in the place usually known as Cabeço de Meca or Cabeço de Santa Quitéria, and is classified as having been a volcanic chimney. This chimney, which was operated as a quarry for the extraction of basaltic material for years, is currently unprotected, as a result of the impasse caused by the PARP, leaving visible the industrial structures that support this extraction, such as a lake in the center of its crater, also a consequence of the same exploitation.