Trilobites. So Cool. They were amazingly diverse prehistoric bugs that completely disappeared from the fossil record during the Permian Extinction. I don't have pictures of any yet (lab tomorrow!), but you can find several online.
Brachiopods. While I don't find them to be particularly interesting, this specimen in lab was fossilized in a manner called permineralization. It resulted in the shell being filled with pyrite.
|Top shell. you can't see the pyrite very well with this picture as it was from my phone.|
|Bottom shell. You can see the top shell overlaying at the top of the photo.|
Diatoms are really neat single celled organisms. They still exist today, but have been found as far back as the Jurassic (200 million years ago). What I love about them, is the unique shell shapes (well, cell wall shapes would be a better term) they secrete. Pretty complex looking for a single cell. They also used to be used as an abrasive in toothpaste!
Anyway, off to take one more run at my Weather and Climate practice test. Happy fossil hunting!