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Found on gravel bar in Trinity River Arlington, TX. This appears to be worm tubes, but what were they up to ?

I don't even know which direction to go, geological or biological, and given the weird concretions and burrows in Eagle Ford don't know where this fits in so looking forward to answer

Hi, I'd be grateful for a ID on this fossil, found today at Worbarrow Bay on the Isle of Purbeck, UK. I can't see anything similar online but my best guess would be coral. Would be very grateful for any deeper insight!

Hey all! Throughout my many years collecting from around the Cotswolds, there has always been one constant: these weird, tubular structures. Originally, I thought them to be corals, when I was much younger. More recently, I have IDd them as the ichnofossils of a Serpulidae. If anyone could confirm or disregard this ID, I would be very thankful!

After my move to Florida, as I unpacked my fossils, I came across this. Any ideas? Possibly giant bacterium or microscopic, cigar-shaped alien space craft? Algae? They are ~3mm long. Salona Formation. Trenton Group Middle Ordovician Antes Gap, PA Tom

Hey there! This is my first post on The Fossil Forum. I don't have a lot of knowledge about fossils, but I sure do know how to find them. Hopefully these aren't too obvious and boring, but I'm incredibly curious anyway. I found these near Sheep Bridge north of Phoenix, Arizona. Here the Verde river has cut through deep layers of ancient lava, sandstone, mudstone, etc. I was exploring for crystals up on a steep hill along the river's canyon walls when I came across a whole lot of these things. They are very fragile and I didn't want to break apart some of the 2-3 foot wide boulders of them so as to preserve them for others to find. Anyway, my understanding is that this area was once a sea floor, so I'm assuming they are some type of coral, anemone or something similar. The fossils are composed mostly of the same sediment which encases them, so I suppose they must be trace fossils, but please correct me if I am wrong. Other not-so-filled-in ones even had crystals and other minerals lining the cavity. As well, I looked at a geological map of Arizona and the area I was exploring is composed of the following... Late to Middle Miocene Basaltic Rocks (8-16 Ma): Mostly dark, mesa-forming basalt deposited as lava flows. Pliocene to Middle Miocene Deposits (2-16 Ma): Moderately to strongly consolidated conglomerate and sandstone deposited in basins during and after late Tertiary faulting. Includes lesser amounts of mudstone, siltstone, limestone, and gypsum. There are a couple photos of some ball shaped objects which were very easy to knock apart from the surrounding stone. I have no idea what those could be. The rest of the photos are of the coral looking objects. Some of them, if still intact, were nearly 24 inches long, but I left those behind and only took smaller samples. Please note how the "head" of the corals appears to flare out and is larger than the rest of the stem. Finally, some of them appear to have a little node sticking out of the "head," but I suspect that may be due to weathering as these are very fragile fossils. Thank you all so much for your interest and help and I look forward to learning more!

I'm going to try this one last time, I'll try to size them down a little. Sorry in advance if it doesn't work. Thanks.

Hello, I found this on shoreline in water near calvert cliffs area Maryland. I found it was quite unique , It seems to have hollow tube areas with divided edges. I was hoping to know what this is, Its heavy but not like a rock heavy. and it is not iron. It is about 8" length but appears to be broken off . Thank you

Found 2 of these, identical in size, in sw Florida. What the heck are the wormy things? Is it internal bits, or worm casts? It's really hard to find online because I lack the terms to use to search effectively. Really appreciate all your amazing help lately. Hopefully I don't get the boot for too many questions! lol

Hi Everyone, This is my first time posting on any kind of fossil forum, and I was wondering if someone could help me ID something that was given to me years ago. Unfortunately I have pretty limited information, but a friend found this while motorcycling from Sturgis, SD back to Ohio. I think he said he found it along the road while still in SD, but it’s been so long I’m not sure. It’s 6.5in length and weighs about 3lbs. When tapped it almost has a ceramic sound in some places. The angle of this pic is looking down through the tubes (some of which you can see straight through). Some tubes are larger but most are 1/16in in diameter. A side angle would show that most of them are straight and run in the same direction, kind of like a bundle of straws. On the insides of the larger tubes, the walls are lined with even smaller tubes. I’ve been able to find one other pic of something similar (from northern Texas), but it was also unidentified. I thought it looked like coral or maybe even worms of some sort, but I don’t know much. Maybe it’s not even a fossil!

These are some of the very few rounded smooth rocks around here and they have these peculiar raised circle shapes. Also next to them, and actually everywhere around here, are these tubes, usually 1.5 inches diameter and broken into pieces up to 6 inches long. The tubes look like they were broken off the bedrock. Any ideas what these two things are?

Retired a few years ago and volunteer and study in environment issues I have come across a tidal dependent fossil beach several 100' long. Huge blocks of shell laden stone with much diversity. So with your help I begin a new research area and will learn about fossils. I thought this huge clam was interesting and would like to start with age. Pleistocene, Miocene are the epic common here on the coastal area of the eastern shore of Maryland. Many may know of the Calvert Cliff area of Maryland. These fossils were found at the same latitude but 30 miles away on the opposite side of the Chesapeake Bay. Any info would be great and maybe just put the bug in my butt to really dig in. thanks