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  1. From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT HAMMER BLOW. SPECIMEN 39mm X 5mm (1-9/16" x 3/16").
  2. Mark Kmiecik

    B0024 Crenulopteris acadica?

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES OF SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 50mm x 28mm (2" x 1-1/8"). ALBUMEN APPLIED TO SPECIMEN.
  3. Mark Kmiecik

    B0023 Stem / pith cast

    From the album: Mark's Mazon Creek Fossils

    FOUND AS IS, SPECIMEN MEASURES 65mm x 25mm x 10mm (2-9/16" x 1" x 3/8"). HAS CRACKED AND BEGUN CRUMBLING. ALBUMEN APPLIED.
  4. From the album: Mark's Mazon Creek Fossils

    BOTH HALVES OF SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 55mm X 25mm (2-3/16" x 1"). ALBUMEN APPLIED.
  5. From the album: Mark's Mazon Creek Fossils

    THREE PARTS, SIDERITE CONCRETION. TWO SPECIMENS IN DIFFERENT LAYERS. SPLIT BY HAMMER BLOW. CONVEX HALF BROKEN AND GLUED TOGETHER. SPECIMENS 65mm x 10mm (2-9/16" x 3/8") & 5mm X 3mm (3/16" x 1/8"). ALBUMEN APPLIED.
  6. Mark Kmiecik

    B0012 Mazostachys pendulata

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES OF SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPLIT FACE APPROX. 45mm x 45mm (1-3/4" x 1-3/4"). ACETIC ACID BATH.
  7. Mark Kmiecik

    A0019 Septarian

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW, PARTIALLY SHATTERED. SPECIMEN APPROXIMATELY 50mm (2") IN DIAMETER. DISTINGUISHABLE FRAGMENTS GLUED BACK TO ORIGINAL POSITION. EXTENSIVE ACETIC ACID BATH & DENTAL PICK PREP.
  8. Mark Kmiecik

    A0018 ?Millipede section

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 25mm x 5mm (1" x 3/16"). ACETIC ACID BATH APPLIED.
  9. From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPLIT FACE 40mm x 35mm (1-1/16" x 1-3/8"). Taeniophyllum SPECIMEN MEASURES 4mm x 3mm (3/16" x 1/8")
  10. Mark Kmiecik

    A0015 Calamariophyllum sp.

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW, CONCAVE HALF BROKEN IN HALF AND GLUED. SPECIMEN 30mm x 20mm (1-3/16" x 13/16"). ACETIC ACID BATH APPLIED.
  11. Mark Kmiecik

    A0014 Lobetelson mclaughlinae

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPLIT FACE 55mm x 47mm (2-3/16" x 1-7/8"). LIGHT ACETIC ACID BATH.
  12. Mark Kmiecik

    A0012 ?Octomedusa pieckorum

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. 13mm (1/2") DIAMETER.
  13. From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. FACE DIMENSIONS 45mm X 32mm (1-3/4" x 1-1/4"). ACETIC ACID BATH APPLIED.
  14. Mark Kmiecik

    A0007 ?Edmondia ovata

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES OF SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. CAST PRESENT, 25mm x 15mm x 5mm (1" x 5/8" x 3/16") . ACETIC ACID BATH APPLIED.
  15. Mark Kmiecik

    A0004 Cordaites borassifolius

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES OF SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 55mm X 9mm (2-1/8" x 3/8"). ACETIC ACID BATH APPLIED.
  16. Another five that I'm not sure of that need an ID or confirmation. Calling on the usual Mazon Creek gang, @bigred97 @connorp @deutscheben @fiddlehead @flipper559 @Nimravis @Plantguy @RCFossils @stats @TheRocksWillShoutHisGlory and anyone else who can help. Thank you in advance for taking a look.
  17. This morning I decided to drive the 90 mile round trip to Pit 11 and do a little collecting. I only spent a few hours collecting and it was one of my least productive days ever. I headed past Godley, Illinois and made a right turn on 5000N, heading to the Mazonia South Unit. This below is a picture of the road as you head to the Monster Lake parking area. I park my car on the side of the road versus the parking lot when I am going to climb the tall hills near Monster Lake. The blue dot is where I park. The lake that is right next to the dot is Monster Lake. Here is what the parking lot looks like, I parked there when I was heading to the Tipple area. Here are a couple pictures of a frozen Monster Lake. After parking on the road I headed to the hill. It is very difficult climbing at this time of the year because of the mud and the ice. Even though it has been warmer over the last couple of days, ice still remains in place on the slopes. I use my Estwing stick to help me up these slick slopes. Up on top, I can see 5000N road and my car. Once on top, the area it totally overgrown (see below) and this is the only time of the year I will collect up here, it is too hard to see and navigate in the Summer. I do use a little rake that I cut down to 18” to move some leave. If you put the time in and you know the shape / color of the concretions, they can be found here. The below pics show concretions as I found them. A crack open half of an Essexella asherae Jellyfish. This was probably opened by a collector a 30+ years ago, when no one cared about the Jellyfish. A nice little Pecten clam, I only found the one half. After I collected this hill, I moved my car to the parking lot and then crossed the street and made the long trip to the Tipple Hill. Tipple Hill was alway a favorite of collectors and some great stuff came from that location. Here is the chain that you have to walk around to get to the hill. I travel light into this area, and I only bring a plastic bag for concretions. Back in the 80’s and 90’s, a couple of doctors from Chicago use to lease this are from Commonwealth Edison and the had a similar mobile home that they would use during hunting season. Sometimes they would open the chain so we could drive up to the Tipple area. hThe road keeps going. There use to be a short cut to the right, but that has since overgrown. Here are pictures of Tipple Hill, it always has a sulfur smell to it. They put this fenced in area about 30 years ago, no one really knew what it was for, but it did expose concretions then and still today. I don’t find much Flora at the Tipple, but on occasion I do. This look like a worn Annularia. There is a lot of petrified wood at the Tipple, I believe most suffering from pyrite disease, but I still pick some up for the ESCONI Braceville trip. A lot of coal is also found here. Even though I did not find a lot of concretions or opened fossils, it was still a nice day.
  18. TyrannosaurusRex

    Mazon Creek Freeze/Thaw

    Howdy folks. I had a question about soaking mazon creek nodules before starting the freezing process. I’ve had mine soaking in water for 2 days (prior to the first freeze, will be several more days), and there seems to be oil on the surface of the water. Is this normal, or is it something I should be concerned about? This is my first time doing this, and I just want to make sure I’m doing it right. It is just plain water, I’ve added nothing else to it. Thank you!!!
  19. Mark Kmiecik

    Mazon Creek ID help

    Calling on the usual crowd to either confirm or refute my meager attempts at identification. I'm not sure on any of these three. @bigred97 @connorp @deutscheben @fiddlehead @flipper559 @Nimravis @RCFossils @stats @TheRocksWillShoutHisGlory I truly appreciate your input. Thank you in advance for taking a look. And anyone else who would like to offer an opinion -- thank you as well.
  20. connorp

    Unknown Mazon Creek Plant

    I'm stumped on this one. Unfortunately it is not very well defined, but it seems like something interesting... I haven't found anything similar before. Any thoughts are appreciated. @stats @deutscheben @bigred97 @Nimravis @Mark Kmiecik @fiddlehead @flipper559
  21. Recently I was talking to a friend of mine and I was advised that her granddaughter, who I had given some fossils about 6 years ago, when she was 10, was not into them any more. I advised her that if she did not want them, I would take them back. So today we met for dinner and I brought the fossils back home. Here most of the stuff- Eurypterid pieces, I believe from New York. Fish from the Brazil Santana Formation. Cephalopod pieces- Ammonite from South Dakota A clam from South Dakota- A couple Texas echinoids. Gryphaea from Texas Pinna from Texas Misc, Brachiopods Mazon Creek Annularia, Pecopteris and Essexella asherae jellyfish. South Dakota Oligocene fossils- coprolite and 2 large Titanothere bone pieces. Fossil shells from Florida- Dinosaur eggshell pieces from China. Starfish- Solnhofen, Germany Dominican Amber with insect inclusion Dinosaur bone pieces This cards were mine when I was a kid- printed in 1962. Petrified wood- Hirn coral- Southern Indiana Some modern shells- And a couple fossil books.
  22. TheRocksWillShoutHisGlory

    Mazon creek shell, not from a nodule

    I introduced a coworker to pit 11 on Sunday. He was picking up all kinds of rocks, some of which I was pretty sure were not caeboniferous, but I didn't want to break his enthusiasm. Now, he dropped off his bucket at my class because I have a freezer, and in the rocks that i was sure were from the wrong Era was this nice shell! Can anyone identify it?
  23. tom_mo

    Mazon creek fossil id

    Hello- I am hoping to get some help with identification of a few concretions. These were all found in Mazon creek pit 11 area. Unfortunately, I was only able to find one side of these. The second to last may not be a fossil, but it has a really interesting/symmetrical shape so added it in just to check. I’m happy to take additional photos if needed. thanks in advance, this forum is always very helpful and knowledgeable when it comes to identifying! -tom
  24. TheRocksWillShoutHisGlory

    Mazon creek "coprolites"

    After cleaning the mud off of what I collected yesterday from pit 11, there are two that I suspect could be coprolites, possibly shark coprolites? These two were found in close proximity, but are both negative halves of separate specimens. I think I see little undigested bits, meaning it's not an egg case?
  25. Mark Kmiecik

    Mazon Creek ID help

    Calling on the usual suspects, @stats @deutscheben @bigred97 @Nimravis @fiddlehead @flipper559 @connorp @RCFossils , to either confirm or refute my meager guesses at ID on these ferns. Thank you all in advance -- I truly appreciate your help. And of course, I'll consider what any others think as well. Thank you.
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