You are browsing the archive for echinoderms Archives - AGU Blogosphere.
19 November 2015
What geological stories can be read from the stone on the front of a building? Walking past some facing stone in Baltimore, Callan discovers a wealth of little clues.
18 November 2015
You could use a macro GigaPan of some pretty sand, I think. [gigapan id=”181069″] Link That’s sand from near Acadia National Park, in Maine. Exploring it, you can find both small chunks of Acadian granite, and green rods that are sea urchin spines. It’s fun – check it out.