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Found 314 results

  1. Going to Mazon Creek! Tips?

    Hey everybody, I'm planning on going to do a day's worth of nodule collecting at Mazon Creek in a few weeks with a buddy of mine. Any tips on where to go? Also, anyone know of a hotel that's reasonably close to where we can start collecting? Thanks for any and all tips!
  2. Mazon creek unknown

    About a week ago I ran across a thread about an unknown possibly being a eurypterid carapace. This made me think about my own unknowns and I'm now wondering the same thing about this:
  3. Wispy Mazon Creek Plant?

    This fossil split a few weeks ago and it has me puzzled. It's from the Mazon River itself and consists of many wispy fibers, with some carbonization at the tips. The edges of a Neuropteris fimbriata leaf have a frayed look that is sort of similar, but the rest doesn't look right. Another possibility I considered was it being some sort of highly degraded non-specific fibrous plant material. But I have not been able to find anything that matches it exactly in my guidebooks. Any ideas?
  4. Mazon Identification Help Request

    Hi all, I have been having some trouble with this specimen. It came from a large collection of Mazon pieces I purchased a number of years back from collector Ron Brandt of Normal, Illinois, who self-collected and also purchased several extensive collections from others. Originally it was identified by someone (too far in the past) as an egg sac of some sort, but after some discussion with someone I would consider an expert, a fellow named Dan Damrow, who some of you may know, some doubt has been cast on that identification. I would be interested in any comments or insights you may have. Thanks, Paul
  5. Mazon Creek fossil plants: Part 1

    Hi guys! Long story short, a rather large collection of Mazon Creek fossils has been donated to my university. I thought I'd share some pictures of the collection and confirm some preliminary identifications. There are a lot of specimens so I will probably split this into two posts. Annularia radiata Annularia stellata A whole bunch of Annularia stellata?
  6. Two Mazon Shrimp or Shrimp and Molt?

    Hi all, Can someone tell me whether I'm looking at a shrimp that was in the process of molting? Thanks! ~Paul
  7. Mazon Creek Eurypterid Carapace ???

    I have had these two pieces in my collection for a long time- I always have had a hard time tossing them when I come across them in their drawer because they remind me of a Eurypterid carapaces. What do you think? @RCFossils / @Rob Russell / @fossilized6s / @Peat Burns and any others that might have info.
  8. Last October I visited Dave's Down To Earth Rock Shop located in Evanston, Illinois and I put together a picture heavy post in the "Trip To the Museum" section of the Forum. At that time I took pics of a lot of great fossils from different locations and all time periods, if you have not seen that post, you should take a look at it, you would be hard pressed to find this quality of fossils in the largest institutions. Today I picked up my grandson and we drove the 14 miles from his house to Dave's. I usually use a scale cube when taking pics of my fossils, but decided to use my 5 year old grandson instead. As I stated above, Dave's is such a great store to purchase Rocks, Minerals and Fossils- but it also has a fantastic "Prehistoric Museum" in the basement. I have been to many Fossil Stores across the US and I have never been to one that can compare to Dave's or even come close. If you are ever in the Chicagoland area you need to stop by this place and I guarantee that you will leave drooling. I am going to break this picture heavy post into TWO sections. The First section will contain pictures of some of the best, if not the best, of what Mazon Creek concretions can hold. In this section you will also see THREE HOLOTYPE Mazon Creek Fossils- one after Dave, one after his father and the other after his mother. The Second section will pics of some of the fossils that are for sale at the store. MAZON CREEK- The first fossil that I will show is one that I personally found about 25 years ago while sitting on the ground near "Tipple Hill' at Pit 11. This is a rare fossil and the only Mazon Creek fossil that I have ever sold, I really wish that I never did, but it can now been seen but the countless people that visit Dave's. Here are the Three Holotype Fossils-
  9. Worm? Plant? Nothing?

    Any ideas on this? I am wondering about the long, thin, bent looking part on the left.
  10. Successful Freeze Thaw 2

    One of my freezer concretions split to reveal this ghostly image. I believe it is a shrimp and was wondering if anyone knew what kind it might be. I was pleasantly surprised to find it as the top and bottom of the rock had broken off and didn't have any fossil inside. I put it back in the freezer anyway since it appeared to have another layer to split. I am starting to wonder if I should get some of my rejects out of my garden border where I have been putting them.
  11. Mazon Creek ID

    An unknown I found at Braidwood, IL, Mazon Creek material. Forgot scale but about 2" wide and 1" long. It was in a marine area.
  12. Hi All, I picked up a lot of Mazon Creek nodules recently. Tried the freeze/thaw technique and have probably gone through at least 10 or 12 cycles with that. Nothing has popped open but flakes continue to come off of the outside of the nodules. On 1 of the small nodules (1.5 in x .75 inch) enough pieces have flaked off on one end to show what looks like a plant fossil, maybe a fern type plant. Looks like it runs the entire length of the nodule. Is there something else I should try to get this cleaned up or just continue the freeze thaw thing? Thanks Eric
  13. Today I went on the E.S.C.O.N.I. (Earth Science Club Of Northern Illinois) fossil collecting trip for Mazon Creek concretions to the Braceville Shaft Mine in Braceville, Illinois. It was a great day for the trip since it had rained recently and exposed a lot of concretions that made surface collecting great, that coupled with great overcast skies and temps in the upper 60's. It was a great day had by all and there must have been hundreds of concretions collected. Here is are a couple Aerial shots of the Shaft Mine. We met at 8 am and most people stayed until 2 pm. Most of the participants, about 40, have been to this site before and new what they were looking for. It great to see people drive as far away as Wisconsin and leave with some nice concretions. A couple hours into collecting, buckets of open concretions were dumped out so the participants could search through the pile and pull out what ever caught their fancy. I brought 3 bucket full of stuff to dump and Rich @stats brought a bucket full and I believe one other person brought some. Here are people from the group searching for some open concretions- there were concretions from Braceville, Pit 11(Essex Biota) and Pit 4 (Braidwood Biota) in the pile. It was great to meet Rich and a couple other Fossil Forum members-Ben @deutscheben and @Lisa102 or as she calls herself "Mud Girl"- . I know that their were other members in attendance, but I am notoriously bad at names and I apologize in advance. I usually never get in pictures, but I thought why not today- it was good day. Here I am with Rich @stats I am the one with the Snoopy bandana- I usually wear that on most fossil trips, but always backpacking, it is like a good luck charm. Here I am with Ben @deutscheben . Here is Lisa @Lisa102 , you can see why she calls herself "Mud Girl"- I give her huge "Props", she was always high up on the spoil pile and collecting some really nice concretions. I know this is Andy, but do not know his FF Tag. I am now going to group the rest of my pictures into 3 topics and I will start with pictures of the area. If you look at the first 2 pics, you can see pieces of boards sticking out, these are remnants of the mine (late 1890's ?) and maybe some trackways the were used by mules to pull out carts. One member found a horseshoe today that would have belonged to a mule. In years past, I also found similar horseshoes and old bottles. You get to the top by going up these gullies. It is important to look for concretions as you go up, because the rain causes them to roll down from the top- it is as just important to look for them on the way down, since a different perspective reveals more.
  14. I have been freezing and thawing this concretion since the end of July and it opened this morning. Initially it seemed to look like some type of insect with wings folded on top of it. I thought the bulbous parts on one end might be a head. However, after I turning it another direction I began wondering if it was a jellyfish. The fossil extends beyond the mineral deposits.
  15. I was a lucky recipient of a wonderfully CRAPPY package from @Nimravis a couple of months ago. Now I need some educating. 1. The only recognizable inclusions in this coprolite are plant fragments, most of which appear to be woody debris. There is one relatively intact "leaf?" that may be recognizable to some of you experienced Mazon Creek folks. My educated guess is it is from a lycopod. Can anyone confirm this. From what I have read, the only herbivores large enough to have produced a mass of this size are Arthropleura, the giant millipede arthropods. How exciting is that!?! 2. This one looks like some sort of stem fragment. Would this be from a lycopod as well?
  16. Mazon Creek ID

    Today I was I was cracking open my daily allotment of Mazon Creek concretions and I came across this piece and I don't recall finding anything like it in the past. I was thinking that it is possibly a seed, but again I have not found anything like it before. What do you think? @fiddlehead , @RCFossils , @fossilized6s @Rob Russell
  17. Last Weekend, August 18th and 19th 2018, was the annual Canal Corridor Mazon River Fossil Field Trip. The weather was perfect! There was a great presentation by Andrew Young on August 18th and Dave Dolak on August 19th. Afterwards, the dinner was excellent, as usual. It was a very productive outing for all involved. I have a couple buckets of concretions to freeze/thaw throughout the winter. It's always a fun trip, can't wait for it again next year! Saturday's lecture before collecting A perfect day! An amazing Alethopteris serlii, which was brought by one of the participants. I believe this was collected from the Dresden area, as it was known for large concretions. Concretions Everyone was tired at the end of the day! A few examples of what was found...
  18. Mazon Creek Nodules

    I recently bought a few collections/accumulations of Mazon Creek fossils. One of them seems to have been a collection of all fauna. After sorting out all the pecopteris ferns and such, I am left with a pile of what seems to be mostly fauna. I am not very familiar with them and don't have very much time right now to figure out the classifications. So I thought maybe someone here would like to work out some sort of trade in exchange for ID'ing these nodules for me? There are shrimp, worms, maybe a few more unusual plants, and stuff I have no idea on. I think I have about 50 nodules. PM me if you are interested, thanks!
  19. Flora or Fauna?

    Another nodule I found already split. I thought it might be plant matter because of the dark color but the shape reminds me of a lamprey picture that I can no longer find. Probably wishful thinking and imaginative viewing.
  20. Mazon Creek Bone Fragment?

    I found this nodule already open and thought it was a fossilized piece of wood. However, it is not the usual black color of most of plants I have found. Could this be a bone fragment?
  21. Yesterday I was cracking open some concretions that I collected from the Braceville Shaft Mine (Essex Fauna) in 1999. I came across this little piece and posted it on my thread - "Sometimes You Have To Whack It". @Peat Burns replied that it looked like a tooth from a Cladodus type shark and I also agree that it looks like a shark tooth. In all my years and thousands of concretions from Mazon Creek, I have never seen anything like this. I would like to get other opinions on this or an exact ID. @fiddlehead , @RCFossils , @fossilized6s , @Rob Russell - what do you think?
  22. mazon creek help

    On my recent trip from Florida to Wisconsin I decided to bypass Chicago and head a little further west. In doing so, I realized I was coming very close to the Mazon Creek area. While I didn't have time to collect nodules there on my way north, I am planning to stop on my way back south towards the end of the month. At best I'll have 3 hours to collect ( as long a time as it takes for my wife to grow impatient and want to get moving again). So, since I am totally unfamiliar with the area, I am hoping someone who frequents the site could give me some pointers. I have read several posts about the site, and realize I am not hunting during the best time of year with all the vegetation at its prime, but being so close I just couldn't pass by again. Any suggestions re: making the most of my time there would be much appreciated. I am thinking I should collect nodules, rather than spending time splitting them, but i've also read only 40 % or so contain something...so suggestions as to that would also be appreciated. (Yes, I have lots of bug spray, mosquitos in Wisconsin have been huge this year,)
  23. Squashed Mazon Creek Crustacean?

    This is another piece from the Mazon Creek Chowder Flats site, it was shattered into quite a few pieces, but I was able to reassemble it. However, I can't tell what it is. I am certain it is some kind of crustacean, based on the texture and color of the shell and the presence of a long segmented antenna. But it seems to be rather flattened, and I can't make out many other details. There does appear to a segmented piece extending from the top edge of the blob to the edge of the nodule, but I can't make out any clear segments or limbs. The shape is reminiscent of Mamayocaris, perhaps just a poorly preserved one? The only other Essex Fauna crustacean that seems to roughly match the squat shape is the rare Dithyrocaris.
  24. Mazon Creek ID

    Last night I was looking through a bucket of concretions that I want to open and I found this piece on the bottom, it is the only piece I have and would have picked it up about 15 years ago. I washed it off and I am stumped by this one. I have sent pics to other FFM who known Mazon stuff, but no definitive ID. So, I thought that I would throw it out to the masses and see what you think. I cannot tell if it Flora or Fauna. The ridges on this thing are very pronounced. Here it is for your viewing pleasure.
  25. What do you make of this?

    Recieved a bundle of Mazon Creek nodules and found one I can't seem to ID. Object is 3cm across and comes up to a shallow cone shape similar to a very old volcano/cinder cone. Any ideas?
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