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Showing results for tags 'francis creek shale'.
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Hello, it’s been awhile! I’ve been opening up some Mazon Pit 11 stuff and came across this thing. I try to keep myself pretty grounded when it comes to Mazon stuff, because I’m horribly bad at ID’ing anything in a concretion. That said, any chance this is an annelid worm? Thank you as always!
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- mazon
- mazon creek
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Hello, Could I get an ID on this mazon creek unknown? It has pretty high relief and strong segmentation with makes me think arthropod like a millipede, but I don't see any legs so maybe it's an annelid worm or something.
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- mazon creek
- pennsylvanian
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This one was sold to me as the acorn worm Mazoglossus ramsdelli... it seems to match photos I see, but I'd like a second opinion, please: This one was sold to me as Archisymplectes rhothon ('ribbon worm') but I'm less confident about this one, so, same question as above. If it's not that, what is it?
- 12 replies
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- pennsylvanian
- francis creek shale
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I went on a trip to the Braceville spoil pile (Pennsylvanian deposits of Francis Creek shale, similar to other Mazon Creek locations but more marine) with the ESCONI club last week. Some of my concretions have already opened and there are a few things I am not sure about. Most of these might be totally unidentifiable, but just in case wanted to check - any input would be great. 1. I think I see some resemblance to a partial whorl of Spiropteris (curvature, and it seems like there are 1.5 whorls present). Could that be the case or it just some miscellaneous plant bit? 2. This one cracked poorly - is this worm identifiable at all? I don't see any evidence of jaws or segmentation. 3. This one is just weird - possibly a coprolite or a bivalve mold? If so, it would be a quite large bivalve. I don't see a hinge or any evidence of shell texture though. 4. Possibly a messed up Achistrum? 5. The elongated leaf in the middle somewhat looks like a small Cordaites leaf?
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- francis creek shale
- pennsylvanian
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Mazon fossils donated to the Indiana State Museum
Sauropod19 posted a topic in Partners in Paleontology - Member Contributions to Science
I officially got notice that my Belotelsonid and trace fossil cf. Protovirgularia dichotoma were accepted into collections at the Indiana State Museum! -
Hello again. I got the time to scrub off my finds from Friday and found one of interest (and a second that I haphazardly split open that I think is a dud). The top one’s shape remained after several rounds of intense scrubbing, and feels slightly 3D in the middle. Other views of top one: Is there anything in the top one or is it just suggestive mineral staining? Additionally, since there is a crevice present around the entire perimeter, would you recommend I try and pry it open or leave the concretion as is? Lastly, just so I can document the correct number of concretions collected on my permit, which of these four examples (if any) would you consider to be a concretion or half concretion. “a” and “d” are extremely thin, both likely part of the outer “shell” of a concretion. “b” is just an odd shape, and “c” is thick but flat. As always, thank you!
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- mazon
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 37mm X 30mm (1-7/16" x 1-3/16"). MILD SULFURIC ACID BATH APPLIED.-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 70mm X 25mm (2-3/4" x 1"). FRAGMENT OF EACH HALF GLUED BACK INTO POSITION.-
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- francis creek shale
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From the album: Mark's Mazon Creek Fossils
CONVEX HALF SIDERITE CONCRETION, FOUND AS-IS. SPECIMEN 63mm X 21mm (2-7/16" x 13/16").-
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- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 80mm X 27mm (3-3/16" x 1-1/16"). BOTH HALVES GLUED.-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 70mm X 30mm (2-3/4" x 1-3/16").-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
FRAGMENT OF CONCAVE HALF OF SIDERITE CONCRETION, FOUND AS-IS. SPECIMEN 50mm X 21mm (2" x 13/16"). MILD SULFURIC ACID BATH APPLIED.-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES OF SISIDERITE CONCRETION, SPLIT BY HAMMER BLOW. 19mm X 4.5mm (3/4" x 3/16"). ACETIC ACID BATH APPLIED.- 1 comment
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- mazon creek
- pennsylvanian
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 50mm X 18mm (2" x 11/16"). MILD SULFURIC ACID BATH APPLIED.-
- mazon creek
- francis creek shale
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J0015 ?Senftenbergia plumosa forma dentata
Mark Kmiecik posted a gallery image in Member Collections
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & HAMMER BLOW. PART OF BOTH HALVES CRUMBLED. SPECIMEN 43mm X 28mm (1-11/16" x1-1/16"). NONE. MILD SULFURIC ACID BATH APPLIED.-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 40mm X 27mm (1-9/16" x 1-1/16"). TWO FRAGMENTS OF RIM OF CONVEX HALF GLUED INTO POSITION. MILD SULFURIC ACID BATH APPLIED.-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
CONCAVE HALF OF SIDERITE CONCRETION, FOUND AS-IS. SPECIMEN 24mm X 14mm (15/16" x 9/16").-
- mazon creek
- francis creek shale
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E0016 Macroneuropteris scheuchzeri basal pinnule
Mark Kmiecik posted a gallery image in Member Collections
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 15mm X 15mm (5/8" x 5/8"). BASAL PINNULE.-
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From the album: Mark's Mazon Creek Fossils
CONVEX HALF SIDERITE CONCRETION, FOUND AS IS. APPARENTLY HAMMERED AND DISCARDED BY SOMEONE. SPECIMEN 44mm. X 12mm (1-3/4" x 1/2").-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 18mm X 9mm (11/16" x 3/8"). CONVEX HALF LOOSE IN MATRIX.-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
CONCAVE HALF OF SIDERITE CONCRETION, FOUND AS-IS.SPECIMEN 23mm X 15mm (7/8" x 5/8").-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 50mm X 18mm (2" x 11/16"). ACETIC ACID BATH APPLIED.-
- mazon creek
- francis creek shale
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Calling on the usual members, again, to either confirm or refute my attempt at ID on these five Mazon Creek specimens. Thanks in advance. @bigred97 @connorp @deutscheben @fiddlehead @flipper559 @Nimravis @Plantguy @RCFossils @Runner64 @stats @TheRocksWillShoutHisGlory Oops, just realized I did not include any size info. These are all close to the same size -- about 1.5 inches (4.25 cm) in the greatest dimension.
- 9 replies
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- carboniferous
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 40mm X 4mm (1-9/16" x 3/16"). EXHIBITS UNUSUAL STRIATIONS. MILD SULFURIC ACID BATH.-
- mazon creek
- francis creek shale
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 18mm X 10mm (11/16" x 3/8"). MILD SULFURIC ACID BATH.-
- mazon creek
- francis creek shale
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