Jump to content

Search the Community

Showing results for tags 'concretions'.

  • Search By Tags

    Type tags separated by commas.
    Tags should be keywords or key phrases. e.g. carcharodon, pliocene, cypresshead formation, florida.
  • Search By Author

Content Type


  • Fossil Discussion
    • General Fossil Discussion
    • Fossil Hunting Trips
    • Fossil ID
    • Is It Real? How to Recognize Fossil Fabrications
    • Partners in Paleontology - Member Contributions to Science
    • Questions & Answers
    • Fossil of the Month
    • Member Collections
    • A Trip to the Museum
    • Paleo Re-creations
    • Collecting Gear
    • Fossil Preparation
    • Member Fossil Trades Bulletin Board
    • Member-to-Member Fossil Sales
    • Fossil News
  • Gallery


  • Anson's Blog
  • Mudding Around
  • Nicholas' Blog
  • dinosaur50's Blog
  • Traviscounty's Blog
  • Seldom's Blog
  • tracer's tidbits
  • Sacredsin's Blog
  • fossilfacetheprospector's Blog
  • jax world
  • echinoman's Blog
  • Ammonoidea
  • Traviscounty's Blog
  • brsr0131's Blog
  • brsr0131's Blog
  • Adventures with a Paddle
  • Caveat emptor
  • -------
  • Fig Rocks' Blog
  • placoderms
  • mosasaurs
  • ozzyrules244's Blog
  • Sir Knightia's Blog
  • Terry Dactyll's Blog
  • shakinchevy2008's Blog
  • MaHa's Blog
  • Stratio's Blog
  • Phoenixflood's Blog
  • Brett Breakin' Rocks' Blog
  • Seattleguy's Blog
  • jkfoam's Blog
  • Erwan's Blog
  • Erwan's Blog
  • Lindsey's Blog
  • marksfossils' Blog
  • ibanda89's Blog
  • Liberty's Blog
  • Liberty's Blog
  • Back of Beyond
  • St. Johns River Shark Teeth/Florida
  • Ameenah's Blog
  • gordon's Blog
  • West4me's Blog
  • West4me's Blog
  • Pennsylvania Perspectives
  • michigantim's Blog
  • michigantim's Blog
  • lauraharp's Blog
  • lauraharp's Blog
  • micropterus101's Blog
  • micropterus101's Blog
  • GPeach129's Blog
  • nicciann's Blog
  • Olenellus' Blog
  • nicciann's Blog
  • maybe a nest fossil?
  • Deep-Thinker's Blog
  • Deep-Thinker's Blog
  • bear-dog's Blog
  • javidal's Blog
  • Digging America
  • John Sun's Blog
  • John Sun's Blog
  • Ravsiden's Blog
  • Jurassic park
  • The Hunt for Fossils
  • The Fury's Grand Blog
  • julie's ??
  • Hunt'n 'odonts!
  • falcondob's Blog
  • Monkeyfuss' Blog
  • cyndy's Blog
  • pattyf's Blog
  • pattyf's Blog
  • chrisf's Blog
  • chrisf's Blog
  • nola's Blog
  • mercyrcfans88's Blog
  • Emily's PRI Adventure
  • trilobite guy's Blog
  • xenacanthus' Blog
  • barnes' Blog
  • myfossiltrips.blogspot.com
  • HeritageFossils' Blog
  • Fossilefinder's Blog
  • Fossilefinder's Blog
  • Emily's MotE Adventure
  • farfarawy's Blog
  • Microfossil Mania!
  • blogs_blog_99
  • A Novice Geologist
  • Southern Comfort
  • Eli's Blog
  • andreas' Blog
  • Recent Collecting Trips
  • retired blog
  • Stocksdale's Blog
  • andreas' Blog test
  • fossilman7's Blog
  • Books I have enjoyed
  • Piranha Blog
  • xonenine's blog
  • xonenine's Blog
  • Fossil collecting and SAFETY
  • Detrius
  • pangeaman's Blog
  • pangeaman's Blog
  • pangeaman's Blog
  • Jocky's Blog
  • Jocky's Blog
  • Kehbe's Kwips
  • RomanK's Blog
  • Prehistoric Planet Trilogy
  • mikeymig's Blog
  • Western NY Explorer's Blog
  • Regg Cato's Blog
  • VisionXray23's Blog
  • Carcharodontosaurus' Blog
  • What is the largest dragonfly fossil? What are the top contenders?
  • Hihimanu Hale
  • Test Blog
  • jsnrice's blog
  • Lise MacFadden's Poetry Blog
  • BluffCountryFossils Adventure Blog
  • meadow's Blog
  • Makeing The Unlikley Happen
  • KansasFossilHunter's Blog
  • DarrenElliot's Blog
  • jesus' Blog
  • A Mesozoic Mosaic
  • Dinosaur comic
  • Zookeeperfossils
  • Cameronballislife31's Blog
  • My Blog
  • TomKoss' Blog
  • A guide to calcanea and astragali
  • Group Blog Test
  • Paleo Rantings of a Blockhead
  • Dead Dino is Art
  • The Amber Blog
  • TyrannosaurusRex's Facts
  • PaleoWilliam's Blog
  • The Paleo-Tourist
  • The Community Post
  • Lyndon D Agate Johnson's Blog
  • BRobinson7's Blog
  • Eastern NC Trip Reports
  • Toofuntahh's Blog
  • Pterodactyl's Blog
  • A Beginner's Foray into Fossiling
  • Micropaleontology blog
  • Pondering on Dinosaurs
  • Fossil Preparation Blog
  • On Dinosaurs and Media
  • cheney416's fossil story
  • jpc
  • Red-Headed Red-Neck Rock-Hound w/ My Trusty HellHound Cerberus
  • Red Headed
  • Paleo-Profiles
  • Walt's Blog
  • Between A Rock And A Hard Place
  • Rudist digging at "Point 25", St. Bartholomä, Styria, Austria (Campanian, Gosau-group)
  • Prognathodon saturator 101
  • Trip Reports
  • Glendive Montana dinosaur bone Hell’s Creek
  • Ladonia Texas Fossil Park


  • Annelids
  • Arthropods
    • Crustaceans
    • Insects
    • Trilobites
    • Other Arthropods
  • Brachiopods
  • Cnidarians (Corals, Jellyfish, Conulariids )
    • Corals
    • Jellyfish, Conulariids, etc.
  • Echinoderms
    • Crinoids & Blastoids
    • Echinoids
    • Other Echinoderms
    • Starfish and Brittlestars
  • Forams
  • Graptolites
  • Molluscs
    • Bivalves
    • Cephalopods (Ammonites, Belemnites, Nautiloids)
    • Gastropods
    • Other Molluscs
  • Sponges
  • Bryozoans
  • Other Invertebrates
  • Ichnofossils
  • Plants
  • Chordata
    • Amphibians & Reptiles
    • Birds
    • Dinosaurs
    • Fishes
    • Mammals
    • Sharks & Rays
    • Other Chordates
  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

Find results in...

Find results that contain...

Date Created

  • Start


Last Updated

  • Start


Filter by number of...

  1. Yesterday I stopped by another good friend of mine (Marty) that I have known for about 30 years. He has been collecting Mazon Creek fossils a lot longer that I have and also use to collect with my mentor Walter. Every once in a while he contacts me and has me stop by to pick up Mazon Creek concretions that he does not want and I go through them and place them into 5 gallon buckets for the ESCONI Braceville trip. I then bring the buckets and dump fossils for the participants. Here is a picture of the bags that I picked up yesterday. Marty also pointed
  2. In a nod to Ralph’s entertaining post, I thought that I would start a thread that I can continue to add on to over the upcoming months. With the Pit Eleven collecting season coming to a close, I decided to venture out one more time before the season ends on September 30th. Pit Eleven is a difficult site to collect due to the heavy overgrowth (lots of thorny plants), uneven terrain and did I mention the bugs. Late Summer/early Fall is especially tricky because unlike the Spring, the vegetation is in full growth obscuring many of the areas that can produce early in the year. The o
  3. Ive decided to start a crab prep thread instead of doing a post for every single crab I prep. If it works, great. If not, then I will go back to seperate posts for each. I will start with this one that I just started today. This is Pulalius vulgaris from the state of Washington and Eocene in age. This was 'Whacked' open by my youngest son. Turned out to be a purty good whack. This first picture is with the top piece of rock tossed away and the 2 pieces you see on the side are pieces from the bottom of the rock. You can easily see how the crab is not situated correctly in the rock.
  4. ChrisSarahRox

    What could this be?

    Found in Hidalgo County NM and the area is from the Maastrichtian epoch. I know what it looks like however I know it's probably just geologic. Also, this was found among other smaller pieces similar in texture and color in approximately 20 square meter area.
  5. ChrisSarahRox


    Found in a field near a rest area outside of Lordsburg NM and the area is still Hidalgo County NM and is still an area that is from the Maastrichtian epoch. Very suggestive shape and was curious as to how something like this forms.
  6. ChrisSarahRox

    Unusual texture

    Was found in Grant County NM near a dry wash but this one was under around a foot of soil. Any help would be great.
  7. Lone Hunter

    A few odd Woodbine things

    All of these came from a cliff face on lake Grapevine, no.1 both of these stood out because of rounded shape, plucked from the face of uppermost part of cliff. no.2 there was a thin layer of limonite running length of ledge, all was unremarkable I saw except this piece, thinking impression of plant material? no.3 assuming it's a concretion, thought it was an ammonite when it was cloaked in dirt, found in crevice with some gravels at top of cliff, doesn't look like Woodbine material so stood out, not calcite. Pics are out of order, first one should be last.
  8. Here is my most fun video to date. This is part 1 of a 3 part crab prepping series. Its about prepping 3 Tumidocarcinus crab concretions from New Zealand at the same time and all the problems that come with prepping them. Part 3, (isn't out yet) will have 2 BIG surprises! The entire series is almost 1 hour long but I had to cram in over 100 hours into an hour. Enjoy https://youtu.be/HlXroj1_hW0
  9. Last Sunday I took the day to scout some former coal-mined land in western Indiana as well as revisit some sites I hadn’t been to in a few years. The mines at these sites were working the Springfield, Hymera, and Danville coals at various points in the mid-late 20th century. The land has been reclaimed to varying degrees, but I hoped that typical Mazon Creek-like fossil-bearing concretions could still be found, despite almost no information in the literature. Temperatures were a little chilly with the wind blowing as I arrived at the first site. There to greet me was a he
  10. Here’s more pics of my wierd awesome rocks and fossils
  11. I live in Chicago and for a while I’ve been wanting to try Fossil Hunting in Mazon Creek. My first trip three weekends ago I tried to have myself prepared but still wasn’t quite sure what I was getting myself into. I hiked to the tipple area, there I had a really hard time telling rocks from concretions because especially in that area most of the rocks are covered in an orange rust. I collected 5 gallons of what I later realized were almost exclusively rocks. The trip was still worth it though because there were lots of these fast little lizards running around on top of the exposed coal, a
  12. This is a statement that I often make to myself throughout the Summer and the vast majority of the time I decide to stay home. This was not the case in decades past and it is not because I am older and slowing down, which is definitely not the case, the main culprit is vegetation. Today I had the idea of going to the Pit and taking pictures of the area so new collectors can see areas that they collect at and also see the conditions that they will face in the summertime. I usually go to the Pit at the beginning of the fossil collecting season (March 1st), this is your best chance to
  13. Peat Burns

    Pennsylvanian fern concretion

    Hi, This is an historic specimen collected in the 1870s or 1880s. Unfortunately, it has no provenance. I suspect it might be from northern Illinois or Southern Indiana. Any help on ID would be much appreciated. I was thinking along the lines of Lobatopteris or Pecopteris strongii?
  14. Howdy all, Any Houston area members interested in trying your prep skills on Mississippian black shale concretions from Fayetteville, AR? I collected too many last year and I’d like to give them away rather than see them collect dust in my garage, or worse, rot outdoors. These concretions are mostly made up of siderite and contain pyritized marine fossils. I dug these out of the lower unit shale and they’ve had limited exposure to moisture and have been stored indoors for months. If interested I’ll mark the exact spot I collected them. This specific unit and location i
  15. In November 2018 I found a site in the Middle Cenomanian Tarrant Formation. Parts of the site were in the Lewisville member of the Woodbine. In the Lewisville I only found a few common bivalves, but the Tarrant produced multiple large concretions packed with ammonites, plant material, fish bones, and some unknowns. Some of the largest concretions were about 2 meters by 2 meters by 2/3 meter thick. But of course sizes and shapes varied. The concretions were a bit crunchy on their weathered exteriors, but in their blue interior they were harder than concrete. Lots of weathered ammonites covering
  16. I didn't get out hunting much last year, still working on figuring out how to research and find spots, but a friend of mine invited me out to do some collecting at one of his spots up in Washington State. I took some family with me and we went out over the Winter break in mid December. Pretty cold but beautiful! We're mainly looking for concretions weathered out of the formation, but occasionally you find Callianopsis claws loose in the formation, usually very brittle and in poor condition. Lots of mollusks to be found as well as crustacean
  17. Great open access paper about the Devonian Gogo Formation Lagerstätte, Canning Basin, West Australia. Trinajstic, K., Briggs, D.E. and Long, J.A., 2021. The Gogo Formation Lagerstätte: a view of Australia's first great barrier reef. Journal of the Geological Society. Yours, Paul H.
  18. ProfMarvel

    Concretion or Fossil Egg

    I found about thirty of these specimens partially eroded out and partially buried approximately 100-200 ft above the Owyhee River in the Upper Great Basin Desert of Eastern Oregon. I would appreciate any identification suggestions. Thank you
  19. Hi everybody. I remember seeing a thread about fossils coming from New Zealand and in it was a paper about legality and such. Does anyone know how I can find that? I tried the internet but all I got was confusion. any help would be much appreciated. Thank you RB
  20. I was eager to get out before the heatwave coming up so I made the visit to a couple new Cannonball sites the other day as well as property adjacent to where I collected the crabs this spring. I was expecting more good bivalve material from the first sites but I'm pretty happy with the results regardless. Sort of a continuation of this topic. I tried a few cuts before working my way down to the area I found the concretions in before. The material in all was extremely fragmented. I still need to bust that concretion. One of the inconspicuous cuts. More fragments.
  21. Hi guys, Brand new to the forum, but excited to be here. I found this in an area where water used to be very high all around me. In fact in a great deal of Thornton Co. In this case I am around the Niver trail. I am not so much the expert in geological terms so I will forego the effort in outlining this, but I will say the rocks around are very interesting. A lot of petrified wood, some form of molten rocks and evidence of extreme heat, has made for some interesting mineralization many of my finds. I look forward to your advice and have much more to show and hopefully lear
  22. Lone Hunter

    What's in this burrow?

    This came from Eagle Ford Kef creek, I have collected odd burrows but this one appears to have things in it. Anyone recognize anything? Can there be concretions inside a burrow? Pictures show wet and dry.
  23. Today I had the pleasure of attending I & M Canal Corridor Trip to collect on the "actual" Mazon Creek (River) in Morris, Illinois. I believe that this is the 11th year for this trip, which is held on Saturday and Sunday on a 400 acre farm that has access to the river. This is the first time that I have participated in this trip and thanks must go out to Rich @stats for letting me know about this trip last year. In January of this year Rich contacted me again to let me know that the sign-up for the trip was on line, so on 1-6-20 I sent my payment of $150.00 in and reserved my space. Some o
  24. jort68

    Concretion Innards

    Hello again! Hope everyone is having a fossiliferous holiday. I found this split concretion yesterday with some organic looking form peeking out from inside. Take a look: No idea. Nothing recognizable except that hole. Found this at the same site, those long and narrow shells might have been what was stuck in there? What do you think? Nothing and it's just gobs of clay?? Let me know if you have any thoughts and as usual, thank you so much for your time and consideration.
  25. Good afternoon folks. I am wondering if anyone in our group has a "collection" of mislabeled concretions. If so, post them here it may help others identify some of their unknowns.
  • Create New...