Chaotic tessera terrain

Chaotic tessera terrain

. Many episodes of surface deformation apparently created this complicated version of the more ordered tessera shown in Fig. 7.22. The complex pattern of ridges and valleys has was probably formed by several episodes of faulting, folding, shearing, compression and extension. The chaotic tessera terrain is often found at relatively high elevations up to 3 thousand meters above the surrounding plains; the Magellan image shown here is located at about 25 degrees south latitude and 1 degrees east longitude within Alpha Regio. The largest ridges and troughs are about 10 thousand meters wide and less than 70 thousand meters long. Alpha is the first letter of the Greek alphabet. (Courtesy of NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University