This past week on Fossil Friday, I gave you a stack of fossils all the way from Danville, Kentucky! What were they?

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This week on Fossil Friday, I bring you another great fossil (or set of fossils) from Dan Phelps, the president of the Kentucky Paleontological Society. This photo has two different species in it, one stacked over the other. They were found in Kentucky and date from the Upper Ordovician.

What are they? How specific can you get?

Dan is not allowed to guess again this week, but he is welcome to taunt the commenters!

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Josh, Steve, and I just returned from spending 8 days with a group of 21 NCSE members on NCSE’s Grand Canyon raft trip. Steve regaled us with the actual geological history of Grand Canyon, and Josh supplemented with a tongue-in-cheek presentation of the creationist view – with me helping a bit around the edges. Josh also kept up the natural history side of things as he introduced us to a variety of invertebrate and vertebrate varmints along the trail.

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This week we have a very special fossil courtesy of Fossil Friday fan Dan Phelps—who also happens to be the president of the Kentucky Paleontological Society. What could it be? Looks like some sort of plant pod to me, or an ancient sloth zipper?

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Last week, I presented you with a set of mammal molars that were neither mastodon nor mammoth. Dan Phelps was the first to identify it as one of the Gomphotheriidaea four-tusked relative of the elephant. 

From the UCMP:

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Happy Fourth of July, everyone! This week on Fossil Friday, I’m bringing you a special request from last week’s winner—a mammal. This genus is found everywhere, except for Antarctica and Australia, but this fossil in particular comes from Nebraska. Go USA!

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Last week on Fossil Friday, I presented you with a tricky identification task. This egg-shaped rock was far afield from the jaws, spines and shells you've been used to.

So what was this unique rock? It was a dinosaur gastrolith from the late Jurassic!

What is a gastrolith?

From the UCMP:

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Last week’s winner of Fossil Friday, GrizzlyD, requested that we do a pseudofossil this week.

“I work at a museum and have to crush many hopes of ‘dinosaur eggs’ that are just round rocks,” he said.

But why would I give you a pseudofossil, when I have a giant archive of real fossils to work from?

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Last week on Fossil Friday, I presented some not-so-tiny toes with some pretty big hints. I said that the fossil was found in what is now Utah, and it dates back to the Jurassic. There was a lot of debate in the comments section, including a  discussion of dinosaur gang colors (I don't want to know...)

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06.20.2014

This week on the Fossil Friday. I answer a special request from last week’s winner, Gerald Wilgus. Gerald thought we’ve had too many invertebrates lately, and maybe we should throw the vertebrate people a bone—no pun intended!

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