Encyclopedia of Earth
Encyclopedia of Earth: Cactus
Describes the physical features of different cacti, the variety of habitats where they can live, their distribution, evolution, taxonomy, and conservation status. (Published: January 10, 2011)
Curated OER
Unesco: Argentina: Ischigualasto / Talampaya Natural Parks
These two contiguous parks, extending over 275,300 ha in the desert region on the western border of the Sierra Pampeanas of central Argentina, contain the most complete continental fossil record known from the Triassic Period (245-208...