A short piece in the September/October 2012 issue of Archaeology magazine highlights the presence of spherical magnetic shards—remnants of the D-Day operations of World War II—found hidden amongst natural sand grains on the beaches of Normandy. « Up to 4 percent of the sand is made up of this shrapnel, » the article states; however, « waves, storms, and rust will probably wipe this microscopic archaeology from the coast in another hundred years. »
The oddly shaped magnetic remains of World War II are thus a good indication of how our cities might appear after humans have long departed.
BLDGBLOG: WAR SAND