Sarmiento Petrified Forest is located in Chubut, Argentina, approximately 28 km from the town of Sarmiento and is accessed through a gravel road. The forest is a provincial protected area and a provincial natural monument that was discovered in 1927. The petrified wood started forming from the Tertiary Era as the Andes Mountain Range rose, preventing the humidity from the Pacific from getting through, this with a combination of eruptions which produced ash deposits, spread around giving way to a slow process of transformation of these logs into stone. The petrified wood is of primitive conifers and palm trees and are a result of the effect of millions of years.