geology

geology

An illustration of Xavier Le Pichon’s analogies between the “rigidity” and what he calls “ductility” of the earth, and human communities he's witnessed from India to France.

An illustration of Xavier Le Pichon’s analogies between the “rigidity” and what he calls “ductility” of the earth, and human communities he's witnessed from India to France.

An illustration of Xavier Le Pichon’s analogies between the “rigidity” and what he calls “ductility” of the earth, and human communities he's witnessed from India to France.

WellfleetSand dunes at Wellfleet. (photo: Joshua Bousel/Flickr, cc by-nc-sa 2.0)