From a real Jurassic Park

Three kinds of microbial fabric and one piece of shrimp poop trapped inside; Jurassic, but no dinosaurs.

Rock

Been tweeting these beauties for days. This one is pink calcite & zoned dolomite cement in a crack in Cambro-Ordovician Knox dolomite. 1/2 a billion years' non-stop fun.

Never did a calendar before

The Alabama Museum of Natural History calendar (2013) features 12 photomicrographs by me of rocks. Pretty ones.

nature abhors a small vacuum

under the bridge
crinoids troll
motes beware

pyramid

Here's where the Aztecs went! Or was it the ancient Conniptions?