The Amazonis quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The Amazonis quadrangle is also referred to as MC-8 (Mars Chart-8).
The quadrangle covers the area from 135° to 180° west longitude and 0° to 30° north latitude on Mars. This area is considered to be among the youngest parts of Mars because it has a very low density of craters. The Amazonia period is named after this area. This quadrangle contains special, unusual features called the Medusae Fossae Formation and Sulci.
Read more about Amazonis Quadrangle: Medusae Fossae Formation, Sulci, Columnar Jointing, Craters, Other Pictures From The Amazonis Quadrangle