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Hello- I am hoping to get some help with id for this concretion recently found at braidwood, pit 11. It was found already opened, unfortunately we couldn’t locate the other 1/2 of the fossil. looking at my literature, I am wondering if this is a roach? Thanks for any help with the id of this fossil! -tom
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Hello- I am posting for the first time on this site, it's been a great resource for comparing some concretions I've found over the past few years. I've been taking my son on these collecting adventures, and we seem to find at least one nice specimen per trip- although it sometimes take a few months for them to crack open! We found this concretion in Braidwood area, pit 11. It had already split but still together. I have some similar looking shrimp but not 100% sure what this is because the overall form looks a little different, so hoping to get some help here. Maybe it is a shrimp as well? thanks in advance for your help! -tom
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Another find in Pit 11 of Mazonia-Braidwood complex. Found already open on the ground. I was unable to find the other half. It looks a bit like the images of Neuropteris fimbriata and Cyclopteris trichomanoides in Jack Wittry's "The Mazon Creek Fossil Flora."
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Pretty sure this is some sort of animal with a notochord but not sure. My fossil friends so far have suggested early amphibian, lamprey, or shark. Given that its from the Francis Shale of Mazon Creek I would think it unlikely to be an amphibian however. I specialize in Neoaves so this is a bit out of my expertise, but I'm pretty sure I've found something amazing!
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I found this half nodule in the southern area of Pit 11 several years ago. I was told by someone at a fossil show it is likely a piece of seaweed. He described it as it being a wavy leaf similar in appearance to a lasagna noodle. Any information about it would be greatly appreciated. Thanks
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Next weekend we will be in Marblehead, Ohio visiting my sisters. I had hoped to stop at St Paul, Indiana on the way to look for some fossils. Unfortunately the quarry does not allow visitors at this point due to Covid. My thought then was to consider Mazon. About a month ago, a post was made similar to this one. It was suggested not to visit due to the ticks and other creepy crawlers. Are the critters still a problem??? Does covid close this park too?? I am all ears to suggestions. Thanks!! If this is not a good choice, there is always the go to Paulding, Ohio!!!! Mike
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Mazon Creek Best Of The Best Archisymplectes Rhothon Schram, 1973
RCFossils posted a topic in Member Collections
Archisymplectes is an enigmatic worm from the Essex portion of the Mazon Creek Deposit. It is always preserved as just a color difference within the concretion. Specimens are nondescript preserving a basic worm shaped body without segmentation or any other obvious structures. Some specimens preserve an everted proboscis. This proboscis is what led the original author to classify it as a Nemertean or ribbon worm. There are no clear Nemerteans known in the fossil record however there are possible candidates dating As far back as the Cambrian. Ribbon worms are fascinating creatures and hold the distinction of being possibly the longest animal known to exist. One specimen was measured at 197 feet while being less than an inch in circumference. This measurement has been questioned as their bodies are quite stretchy which makes measurements difficult. Their proboscis fills with fluid and shoots out of the oral cavity similar to the finger on a rubber glove. This is used to capture prey. Most modern ribbon worms are predators feeding fish, crustaceans, Gastropods and other worms. Some Modern ribbon worms are poisonous containing tetrodotoxin which is the same poison as in some pufferfish. Sections of the body can break off when stressed. Many ribbon worms have the ability to regenerate. It is possible to chop up a ribbon worm into many pieces forming new smaller individuals. It has been estimated that If cut up, one 6 inch worm could form as many as 200,000 individuals. Archisymplectes is rare in the Mazon deposit. -
On March first, I decided to rent a car and drive south. I'm finishing school in Chicago in May and am preparing to move west, so I really had no time to waste collecting Illinois. I hit three spots - one limestone road cut and one shale road cut in Oglesby, IL and the Mazon pits on the way back up to the city. I'm grateful to a few members for their posts and message replies regarding the road cuts, I couldn't have done this trip without them. I took off at 7 AM towards Oglesby. Here's the map, if you look at Oglesby on Google maps the location here should come together: Once you're there, it's basically a free for all. You are searching through the LaSalle Limestone Member of the Bond Formation which houses Pennsylvanian fossils. There are brachiopods everywhere you look which crumble down the hill and expose new matrix. Here are some of the Linoproductus I took home: I'll make another post for the second road cut
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Hey Folks. I’m fairly positive this is a partial tullymonster. Found it yesterday, 3/7/20 in Mazonia south unit. Thanks in advance for any confirming comments.
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Hey guys, I braved the creek yesterday on the first day of hunting season at Mazon. It was a thrilling first time getting to hunt there. These of the surface finds were pretty interesting looking and were among many duds, so I'm wondering if anyone has any ideas as to their classifications. The rest of the lot is in the freezer so look for my thread on that in a bit More concretions in the following posts: Thanks for looking!
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The fossil addict in me would really appreciate IDs on the following from the thrift store down the block: Mazon concretion, I thought it to be a crab at first glance but you tell me: And then this, which I couldn't peg for a mineral or some kind of fossilized pollen..... Really don't know what to think. It's about 0.5" square. Any ideas would be greatly appreciated, thanks for taking a look.
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I have been looking into getting started collecting at Pit 11 in Mazon Creek within the Braidwood-Mazon State Park. I know that there are some forms I need to complete to collect at the site. From what I’ve found, the form isn’t even on the park’s website anymore and neither is the report that the form alludes to. Are these forms still valid? Where can I find them? Are there any other rules that I need to know?
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Hey all! Just bought this piece at a rock shop here in Chicago. It was sold to me as a shrimp, the shop owner was pretty confident in this, but I'm pretty sure it's a fern instead. Not disappointed since I just appreciate the composition here, it's a super pretty one, kind of off-beat. Can anybody help ID the exact fauna? Thanks so much!
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Hello, I’ve noticed something odd with some of my mazon creek fossils that I haven’t looked at in a long time. Some of them seem to have small spots developing on them that I could swear weren’t there, say, 10 years ago. Anyone have any idea what these little circles are? There are 4 on the left Tully monster right above the white paint. And 1 on the right Tully just off the lower left edge of the body. And the white paint is a whole different issue... Open to any suggestions on how to remove that too... was thinking about rubbing alcohol. And then here is a shark egg case that seems to have a LOT of the little spots/circles. Thanks for any insight.
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To those of you who are serious collectors, this is probably not thought of as an outstanding specimen, but as I'm primarily a mineral collector, I was thrilled to find this piece! I believe it's a section of Calamites, with what I consider some amazing crystallization of calcite and sphalerite.
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From a flat of specimens identified as from Pit 11. Mouth looks familiar as that of Achistrum, but no dessication cracks. Looking to confirm identification. Thanks! ~Paul
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Hi all again Found this again in Wilmington sport club, Was told by a friend was petrified tree stump wanted opinions from some of you guys that might have found something like this.