Quaterra Resources Inc. (Quaterra) is an exploration-stage company. It is engaged in the acquisition and exploration of precious and base metal mineral properties in the United States and Mexico. Its Nieves silver project is located in the Rio Grande municipality of the zacatecas mining district near the southeastern boundary of the Sierra Madre Occidental Physiographic province in central Mexico. The Nieves property consists of 16 concessions covering approximately 6,050 hectare. The MacArthur property consists of 409 unpatented lode claims totaling approximately 8,450 acres on lands administered by the United States Bureau of Land Management (BLM). On January 6, 2010, Quaterra signed an option agreement with La Cuesta International Inc. for an option to acquire a 100% interest in four mineral concessions located in Durango, Mexico known as the Santo Domingo Prospect. On June 17, 2010, Quaterra signed an option agreement with Grande Portage Resources for the Herbert Glacier property.