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I acquired another thing the other day from the same folks who gave me the oncolite slabs I posted in this section... They felt this is wood from Arizona, but didn't seem as confident/precise as I'd like about the location, because of the unusual detail in the wood structure, though I can see it's still agatized and not as detailed as in other pet woods... So based on that and the color I would guess Chinle Fm from Arizona too, but I'd like some other opinions. Yay or nay? If Arizona, where in Arizona? Slab is about 14cm long and 5mm thick.

Ran across this rock at my neighbor’s property. These are most likely millipede tracks. It’s a big thick rock so getting it home will be a challenge.

Hello, I bought this tooth from a popular fossil selling website where it was labelled as 'Postosuchus?' but the description says it is from the Redonda Formation which has not had a Postosuchus formally described from it. I'm aware there a few other species from this formation that are also pseudosuchians and could have a similar type of tooth, which I do not mind if it is one of them. Although, I absolutely love Postosuchus as a creature and I hoping that is what it is, though I know it's definitely unlikely. From my research, I assume it's Redondasaurus but this particular site has several other teeth from this formation specifically labelled as Redondasaurus so I assume there is a reason why they labelled this one and a few others differently. I've seen small teeth like this labelled as Coelophysis but I know that's extremely unlikely because it's not recurved but if it was that would be super cool! I don't have the greatest lighting equipment in my house to take pictures of it, but I can provide some shotty ones if that would be helpful! The tooth is 0.74 inches long, so quite small. The picture below is from the website I bought it from and it shows the detail much better than a photo I could take. Please don't be afraid to disappoint me! I just want to know what this tooth is!

Now that I'm shut down for member the winter I'm going to try to catch up on my cataloging and ID work. First up, is this an ischium? If so whos? Any help appreciated. It and all the others I will be asking about are from the middle Petrified Forrest member of the Chinle formation...just below the Black Forrest member (it's almost completely erroded away and covered unconformably with the early Cretaceous Dakota Group Conglomerate) in undisturbed reddish brown mudstone with copious huge fossiliferous coprolites(?). Please let me know if I have forgotten any key info and thanks.

Hi everyone, (Long story about how all this got started deleted, maybe later if anyone is interested) I have found at least three "sites" on my property where I have been finding phytosaur and metoposaur teeth and bone fragments for years now. Good fun for the kids and grandkids! Last month I finally decided to dig a little into the side of a small embankment where I had picked up a few teeth expecting to maybe find a couple more.....well...a couple hundred teeth later (plus partial teeth, bone fragments, scutes etc), a large phytosaur caudal vertebrae, a metoposaur interclavical(?) and a left dorsal corner scute from a desmatosaur (missing the spike-dangit!) I am thinking I need some advice on things like taking field notes, grids, stabilization, cataloging and especially identification. I don't believe the site is all that significant, most of it is regurgitates so a lot of the material is just chalky gunk (different than the siliceous nodules), but there is enough good stuff to make it really interesting. The teeth range from 2 mm to 56 mm and are from at least 5 species. I have only excavated a little less than a square meter each in two spots.....the surface fossil area is about 8m by 20m. I believe the deposit is in the upper Petrified Forest Member (purplish brown mudstone) of the Chinle formation possibly just below the Black forest member (based on the pet wood logs coming out of the much lighter colored and significantly altered layer between 1 to 5 m above. Lying (unconformity) on top of this is the early cretaceous Dakota Group Conglomerate. I already found the extremely helpful article Troodon recommended in one of the topics about the teeth of Coelophysis Bauri which answered many questions.....and then generated a whole new set. Well, several sets, like how do you tell the difference between juvenile C. Bauri pre maxilary ribbed conical teeth and what the consensus on the internet calls metoposaur teeth ( not to mention that the term "rutiodon" means wrinkled tooth)? Also, how am I supposed to measure the denticle width, lenght etc when its only 0.066 mm? I can't even see them (I can feel em though)! Also, now I need to find a similar study on Postosuchus.....several of these teeth are way to big for C. Bauri (all of them found within a few cm of the desmatosuchus scute....). You see! I really should document all this.... Any way, enough of my problems....I am going to try to figure out how to post some photos of this stuff in a collection if any one is interested. Rebecca

Probably from Petrified Forest member. Literature says phytosaur remains a common occurrence. Can anybody confirm what it is?

Hey all! 13 years after I made an account, I am finally ready to participate. I live on Kaibab limestone among sponges and shark teeth and have been hunting the Kaibab limestone for a couple decades. I think I have a pretty good representation of most of the faunal found in the rock. I love that the Kaibab has so many different layers of different kinds of rocks and animal communities. It's the nautiloids and trilobites that get me most excited, but I still look at every sponge and brachiopod fossil that I see. Heads and tails!

Yes! What this?

Possibly a burrow? Found beneath the Chinle formation on US89 in northern Arizona. 4 inches long, 2.5 inches tall, with a slight curve and a flatter bottom side. The rock looks like limestone, but was found on a flat wash without similar rock in the nearby area.

Now that the weather has officially snowed me in. I’ve gotten around to posting some trips I took during the summer. At request of my friend, I won’t reveal the exact location of this area but if you know where this is you know there’s abundant petrified wood. I can say it’s close to Capitol Reef National Park (definitely not in the park ). Here’s the stratigraphic column for the area. The petrified wood we were looking for were in the Petrified Forest member and the Shinarump conglomerate member. The area is a long hike in. So even though we saw abundant wood, we could only take what we physically could carry for a couple miles with our camp gear.