Chajan
Occurrence number:
008-00-009
Carbonatite:
No
Narrative:
Nepheline basalts form the plugs of La Leoncita, La Madera, La Piedra and La Garrapata, all having diameters of about 1 km, while the plug of Cerro Piedra is much smaller. They cut Precambrian micaceous gneisses and form prominent hills.