The Sistema Coriano also known as Lara-Falcón Formation, Coro region or Coriano system is one of the eight natural regions of Venezuela. Is the hilly and semi-mountainous area in northwest Venezuela, north of the Mérida Andes and east of the Maracaibo Basin, extending north to the Caribbean coast. It consists mostly of east–west running ridges, with the exception of the Sierra de Siruma or Empalado which run north–south.