Natural Abstract Art

This art took hundreds of millions of years to produce. Every year Tucson hosts it's Gem and Mineral Show. Also featured are things that interest me more, fossils and meteorites. This image is a section of one of the fossil slabs that I purchased to make tables tops.
What you see here are shelled sea creatures known as Orthoceras. They are related to the current day Nautilus. They lived and died about 400 million years ago in an age called the Devonian, when plants and animals first started to colonize the lands and fishes filled the oceans. Canon 20D - 1/3 second, 34mm @ f/5, ISO 100, using the on camera flash.