Fazenda Colorado Geoglyphs

Un-named culture (pre-Inca), occupied from 25 CE to 1590 BCE., when the rain forest cover would have been removed; located in Acre State, Brazil.

Elevation varies c. 152 Meters (500 feet) above sea level.

Materials: earth.

Data for CG model:
1. "Pärssinen, Schaan, and Ranzi, 2009; "Pre-Columbian Geometric Earthworks in the Upper Purús," in Antiquity 83 (December, 2009)
2.Google search: https://www.google.com/search?biw=1276&bih=1484&tbm=isch&sa=1&ei=lGK5WoHqL5DgjwPQzougCA&q=Geoglyphs+of+the+Brazilian+Rain+Forest&oq=Geoglyphs+of+the+Brazilian+Rain+Forest&gs_l=psy-ab.3...132053.132053.0.138804.1.1.0.0.0.0.431.431.4-1.1.0....0...1c.2.64.psy-ab..0.0.0....0.nrSNZzKWXU0