Can someone identify the animal that this tooth came from (its about 10cm long) and set in sandstone. I found this on the beach at lime regis about 6 years ago. I found this on a family holiday to Lime Regis and have always thought of it as a sharks tooth, but as I have got older I realise that it is not (the shape of the root is wrong) and it is quite large at roughly 10cm from tip to tip so now I am trying to find out exactly what it is. —Paige

Fossil Collector: Paige R

Location: Lyme Regis, United Kingdom

[Editor: Very nice find! This appears to be a handsome mosasaur tooth. A mosasaur is a marine version of the modern monitor lizard some of which could achieve enormous size. The large root seems atypical for mosasaur teeth at this location so maybe collectors more familiar with Lyme Regis can leave a comment.]

"I found this in a creek bed in Snowball, Arkansas. Looks to me like a bit of petrified wood or some sort of palm tree? The center could that possibly be a crinoid? Just making guesses."

"Arkansas Geological Society says: You have found a nautiloid. These animals were the pre-cursors to the modern day squid and octopus. The living representative of this family is the Nautilus."

Fossil Collector: Elizabeth K.

Location: Snowball, Arkansas

[Editor's Note: The AGS usually knows what it is talking about, but we are having a difficult time seeing a nautiloid here. Anyone recognize it?]

I got two ID’s on this. One guy said fossilized wood. Other guy said fossilized wood casts....where the wood rots away and is replaced by minerals. Either way I knew it was related to some kind of fossil wood. Largest piece is about 2" long. I found this on one of my arrowhead sites. I find a lot of this stuff in one specific spot. —Buddy

Fossil Hunter: Buddy

Location: Central Ohio

[Well, let's try a mash up just to spark conversation so we will add fossil root casts as another alternative. Would anyone like to leave a response in favor of any of these?]

I was on a trip with my grandparents who are from Minnesota and we did some rock collecting.

Fossil Collector: Chris N.

Location: Pebble Beach, California

[Editor's Note:  Our first thought was that this is just a bit of conglomerate rock, but that triangular shape in the lower left looked a bit too familiar. It appears to be the apron on a female crab. We are looking a the bottom of the fossil crab with the apron in the middle and sections of carapace on either side. A bit of the rear flipper leg projects from the bottom right of the shell. Nice fossil find!]

Possibly Paleozoic era coral found while flying kites with my son. It looks like ridged bronchial tubes.

Fossil Collector: Christa1

Location: Southwest Michigan

I found this fossil when I was 14. I was down by a stream in the mountains of the Poconos. I was building a dam with rocks from around the bed of the stream. I noticed this fossil and to this day am not sure what it is.

Fossil Collector: James W.

Location: Pocono Mountains, Pennsylvania

[Editors: Well, well racked our brains because we know we have seen this before, but simply could not remember what it is. Maybe a large brachiopod? If anyone recognizes it, please leave a response and put us out of our misery!]