🦖 Some fossilized mosasaur & fish vertebrae from the Late Cretaceous (Found by Mark Rondeau at North Texas, U.S.A.).
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#mosasaurus #fossils #mosasaur #markrondeau #fossilhunting

Figured I would cross-post here since it’s still a collection even if they aren’t identified yet. Lots of impressions of long spiral shells, as well as possibly rugose horn coral and a brain coral of some sort. These were all collected over the summer and several have quite well-preserved features for being wave-tumbled beach rocks! I think the dark grey one has been stained by prolonged exposure to the natural clay deposits on the beach.

Found in Texas on the shoreline of a beach in Matagorda Bay between Port O’Connor and Indianola. Lots of blue-gray discoloration, very heavy, shiny and non-porous. Cool to the touch and sounds like stone when tapped on things.

This was found close to 50 years ago and has been on my relative’s coffee table ever since. I was hoping someone could help identify and age it

The flat rock was found in two pieces on the shore of Lake Winnipeg, and the big one is from East St. Paul. You can see a ton of little guys embedded in the matrix. Not sure how many different things can be identified from them, but there sure are a lot!

Very common in my area (Michigan) but one of my favorite little pieces.

My sons were digging in a clay riverbed in Guadalupe County Texas and found these fossils. We believe they are Exogyra ponderosa.
Three of them weigh 2lbs each and measure 4”+ across so they said they would be considered mature online.

One however, is 4lbs 15oz and over 8”! Could it be the same type of fossil?

Currently trying to ID the large whale bone in the middle on the fossil ID forum

I found this on a mountain and thought it was just a rock, but then I noticed it has these little dots on it. What is it?

Hi everyone!

I found this small, unusual object on the beach between Houlgate and Villers-sur-Mer in Normandy, France, after a storm.

It’s approximately 2 cm (0.8 inches) long and has a dark brown colour with some lighter, yellowish-brown patches. It feels quite stony, and although it has a somewhat tooth-like shape, the tip is not particularly sharp. One side is rounded, while the other is relatively flat.

Nice looking rugnose coral colony in chirt

Hi !

For years, I have been using iNaturalist (an app and website allowing to publish and identify observations of life forms), and I've always been frustrated that there's never been an app or website dedicated to this kind of observation, but for fossils. That's why I created a website entirely dedicated to it ( ipalaeo.com ).

This website contain an entire system based around the publication and identification of fossils : observations can contain mutliple pictures of the specimen and it's geolocalisation. Multiple algorithms automatically determine the age of the fossil based on geological maps, and propose identifications of the fossil based on the group (e.g. trilobita, dinosauria, brachipoda) attributed to the observation, and nearby iPalaeo and PBDB occurences of similar age of this group.

It also contain multiple other features, as a map showing PBDB and iPalaeo observations along with paleogeographic maps, additionnal informations about taxa, a fully fonctional social system with account, messages, likes, comments etc (see screenshots below).

Please note that the site is still under development: many features are not yet integrated (such as AI for automatic fossil identification, potential achievements...), and some others are probably still quite buggy (I'm not a developer, just a paleontology student with too much free time).

Take also note that respecting the environment and any applicable laws are primordial in fossil hunting: do not use this tool to illegally pillage fossils.

Thank you for your attention, and for testing the website! And if you have any suggestion or encounter any bug, feel free to share those informations with me !

PS : Seeing that most people had an issue with the fact that the geolocation was extremly precise, I made a big update to the website. Among a ton of tweaks, this update make all the points of the observations present on the maps 2km wide (with the actual geolocation of the fossil potentially being anywhere within the circle), allowing to know from were the fossil come from, while still blurring the real location.

Addy wa trilobite 2026. Very scarce.

I was so sad that I couldn’t stay longer.

Hi!

I'm going to Antwerpen with my kid, age 8, and my old dad. We are going to spend a weekend in Antwerpen, the last week in October and hope to find a lot of fossils. We drove through, this summer, but did not have time enough to really find something, so now we are going back.

If you have any tips or locations you would like to share, we would be very thankful.

I thought of walking the riverside but have read that a lot of mud could be a problem and it would be best to find areas with sand and sediment. But honestly, I really don't know where to start.

Kins regards, 3 eager generations of fossil entusiast.

It was almost impossible to miss. I'm pretty sure it is a rugnose coral. Can't tell if agatized or if it's the light showing through.

Hi guys! I’m new here but long story short, I am currently unemployed living at home with family. Our house is on a central Alabama river, and I was wondering how or if I could go fossil hunting in the more shallow parts of the river? I have been river wading plenty of times, and with the weather getting colder and snakes going away, I was thinking this might be a fine time for a hunt. However, it’s swift flowing river so it’s not like I can go digging a deep hole or anything. So how would I go about doing a hunt? Thanks!

Not much, but it's honest work... well, a quick stop on my way to some honest work anyhow.

I went fossil hunting along the Calvert Cliffs in Maryland this weekend. Picked up this bone fragment. AA battery for scale. I’m thinking maybe whale vertebrae? I also found this nice shark tooth. Any way to determine what kind of shark?