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Showing results for tags 'pennsylvanian'.
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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 30mm X 9mm (1-3/16" x 3/8"). MILD SULFURIC ACID BATH APPLIED. -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 9mm X 6mm (3/8" x 1/4"). MILD SULFURIC ACID BATH APPLIED. -
C0102 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, FOUND ALREADY SPLIT. SPECIMEN 19mm. X 13mm (3/4" x 1/2"). -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 10mm X 9mm (3/8" x 3/8"). -
I’m thinking this is Stigmaria. Scale bar = 1 cm. Found in the shale below the Brush Creek limestone, a zone with many plants.
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- glenshaw formation
- kasimovian
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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
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- francis creek shale
- mazon creek
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Calling on the usual members 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
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- francis creek shale
- mazon creek
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I found this a few yrs ago and still can't figure out what kind of fossil this is. I'm trying to figure out if this is plant or a different type. It's 2inches wide. Any ideas? Thanks.
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Hi everyone, I am pretty new to fossil hunting, and have just started going for plants. Recently, I visited a site in Ambrige, PA, and found abundant plates containing neuropteris and calamites. I split some leftover shale when I got home and found what looked like dried leaf veins tightly sandwiched between the shale. There are several of these structures that consist of a central vein with smaller veins that branch off. These are not fossilized, and are not a part of the rock, as they can be easily brushed off. I just find it hard to believe that an entire modern leaf could get wedged in there. Are these fossils in the making? Has anyone else encountered this? Thanks in advance!
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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 74mm X 13mm (2-15/16" X 1/2").-
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- francis creek shale
- mazon creek
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE/THAW & LIGHT HAMMER BLOW. SPECIMEN 65mm X 15mm (2-9/16" X 5/8"). -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 65mm X 25mm (2-9/16" x 1").-
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- francis creek shale
- mazon creek
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE/THAW METHOD. SPECIMEN 72mm X 19mm (2-7/8" x 3/4"). -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE/THAW METHOD & LIGHT HAMMER TAP. SPECIMEN 75mm X 22mm (2-15/16" x 7/8"). FRAGMENT FROM MARGIN OF CONCAVE HALF GLUED BACK INTO POSITION. -
I recently found this bit of fish bone in the LaSalle Limestone of Illinois (Upper Pennsylvanian). Measures about 1cm in width. I know that tiny bone bits are tough to identify, but the surface texture on this one seems pretty interesting. I haven't found anything similar before. The positive is shown above, although I think the negative shows the surface texture better. Can anything be said about this? @jdp @RCFossils @deutscheben Thanks for any help.
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Yesterday I finally made it out to one of my favorite hunting spots after (almost exactly) a year away. This road cut in La Salle County Illinois had been visited earlier this year (I believe) by @Nimravis, @aek and @connorp, but I really wanted a crack at it before summer fully kicked in. As I had been warned, it was already heavily overgrown, with poison ivy located intermittently across the slope. There were also mosquitoes in the shady areas and wasps in the sunny ones. However, with some delicate maneuvering I was able to avoid most of the hazards, with only some mosquito bites to show for it. I was at the site from 11:30 to 5:30 and the sun shone bright nearly the entire time, although thankfully an occasional breeze kicked up and cooled things off. Here is a sequence of the path up to the head wall, as you can see it quite brushy at the base of the cut. All in all, I would call it a successful day. I was able to find quite a few interesting mollusks, both gastropod, cephalopod, and bivalve, that I had not encountered before from this site, and a few trilobite bits as well. The real reason I keep coming back to this location, however, is the high-quality and diverse chondrichthyan fauna found here, and it did not disappoint. In addition to many tiny shark bits which may or may not prove to be worth prepping, I found a few larger specimens which I am hoping are all or mostly complete. The trip-maker was this beautiful Deltoptychius: I also shared the site for part of the afternoon with @TheSandStorm, who was making his first visit to the locale- it was a pleasure meeting him. I love seeing new folks getting out to explore and discover the wonders of the fossil world! I will share more pictures of my finds in the next post.
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- bivalve
- bond formation
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I don't expect this one to be easily solvable. I've found nearly two dozen Petalodus teeth over time, so I have a good idea of what the cross section looks like for the tooth material. The white edges with the canals reaching inward. You can't see it will in the photo but there is a calcite grain structure in the center. This piece was oddly shaped and fragile. It's unlike any of the surrounding rock. There are 4 pieces in all, but this one has the best look. The lumps at the bottom edge are raised and textured like the surface of some teeth are. The scale along the bottom of both photos is in millimeters. Maybe it's just a shashed up Petalodus tooth root. Have any of the Carboniferous shark tooth hunters perhaps seen something similar? This second photo is a closer look at the raised areas. There is a lot of matrix infill here, so again, it will probably be difficult to identify. At the very least, I'll stick the pieces in a box and file it under mystery fish parts.
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION , SPLIT BY HAMMER BLOW. SPECIMEN 32mm x 10mm (1-1/4" X 3/8"). -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY LIGHT HAMMER TAP. SPECIMEN 70mm X 22mm (2-3/4" X 7/8"). CONCAVE HALF BROKEN - GLUED. -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 65mm X 14mm (2-9/16" X 9/16"). -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 4mm X 3mm X ?mm (3/16" X 1/8" X 1/16"), PARTIALLY HIDDEN IN MATRIX. -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES OF SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 40mm X 30mm (1-9/16" X 1-3/16"). ALBUMEN APPLIED. -
Hoping to determine species and exact structure in pic. This was found in Eaton county in 2021. It came out of material from the Pennsylvanian era, where other club moss casings and fossils have been found. First “cone” or “flower” I’ve come across. Will post more pics later today of this as well as some other pieces of other mosses I’ve collected over the years. Couple pics included without ruler just as teasers…
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From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 16mm X 11mm (5/8" x 7/16"). -
From the album: Mark's Mazon Creek Fossils
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 55mm X 30mm (2-3/16" x 1-3/16"). VERY GRAINY MATRIX.
