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Showing results for tags 'siderite'.
Found 12 results
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Hi people, I have a query regarding the contents of some siderite nodules from a Duckmantian fossil forest site in N Wales for my PhD project. I had thin sections made of parts of several nodules and they all seem to have an abundance of 'faecal pellets'; rounded, often curved (banana-ish) shaped, mostly stratified pellets. These pellets have been replaced by siderite (FeCO3) and sometimes include pyrite and seem to have been the locus for early sulphate reduction by bacteria before conditions arose for the siderite precipitation. I've attached SEM images of the thin sections
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Hi, I have noticed that in the past in the UK various fossils have been found at mines like Crock Hey in siderite nodules, I know of some open cast mines in my area with carboniferous strata of County Durham, is there a chance these could contain such siderite nodules? I have done some research and these type of nodules appear at Howick bay but im not sure if they appear further south at places like whitley bay/seaton sluice
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I just returned from a dig near Baker, Montana. I found this part of an Edmontosaurus jaw with the teeth replaced by siderite. I thought it was a rare replacement. If important, the KT boundary was very visible on this ranch. The section is about 3 inches by 3 inches.
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I picked this little nugget up quite a few years ago, during my early infatuation with coprolites. All I know about it is that it was found near Price, Utah. I have siderite "formations" from around the world. This is the only one I've seen that looks like it has an inclusion (or should I say the cast of an inclusion). There has long been a debate as to whether siderite rocks such as these are coprolites, casts of voids (fecal and otherwise, or iron-rich mud extrusions (what I like to call "Earth poop"). My questions are: 1. Does anyone happen to recognize what formation this might
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310-million-year-old fossilized brain found (Mazon Creek, Illinois)
Oxytropidoceras posted a topic in Fossil News
Perfectly preserved 310-million-year-old fossilized brain found By Harry Baker, Live Science, July 28, 2021 Bicknell, R.D., Ortega-Hernández, J., Edgecombe, G.D., Gaines, R.R. and Paterson, J.R., 2021. Central nervous system of a 310-my-old horseshoe crab: Expanding the taphonomic window for nervous system preservation. Geology. Open access Yours, Paul H. -
I've had this for a while but don't recall where I got it. Someone probably gave it to me - without data as usual. Is it one of those 'pseudocoprolites' from the Miocene Wilkes Formation of Lewis Co, Washington? Or do things like this occur elsewhere? Are there any confirmed coprolites that look like this, from any place? If not a coprolite, what is is composed of - limonite, siderite? @GeschWhat
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My sister purchased this from a rock/fossil shop in Oregon. She was told it is a turtle coprolite from Madagascar. Though I am a VERY amateur rock and fossil collector, I questioned whether it is a coprolite. It is very heavy for its size and non-magnetic. After doing some research, I have come to the conclusion that it is Siderite from Salmon Creek, Washington, USA. I am doing a Rock and Mineral Show and Tell for my sister-in-law's 5th grade science class and want to make sure my identification is correct. Would anyone like to weigh in on this? I would appreciate feedback. Thank you.
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Each nodule is about 6 inches/15 cm in greatest dimension. Please help me identify possible fossils inside. Collected on KAS 2019 field trip near Berea, Kentucky. https://en.wikipedia.org/wiki/Siderite
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- fossils inside of round rocks
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Evenin' all! Am I going a little bit doolally, or is this impression a fossil? It's situated between a couple of thin plant fossils either side, on a piece of siderite from Duckmantian Carboniferous deposits in North Wales, UK. I've played with the lighting a bit to try and bring the details out.... It's not noticeable to the naked eye, but the photos seem to be showing up spines/protrusions in one area? It's probably nothing, but worth a double check. Cheers!
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New Mazon Creek Lagerstätte Review Paper - Open Access
Oxytropidoceras posted a topic in Fossil News
The open access paper is: Clements, T., Purnell, M. and Gabbott, S., 2018. The Mazon Creek Lagerstätte: a diverse late Paleozoic ecosystem entombed within siderite concretions. Journal of the Geological Society. Journal of the Geological Society (2018) 176 (1): 1-11. https://doi.org/10.1144/jgs2018-088 https://pubs.geoscienceworld.org/sepm/jgs/article/545488/the-mazon-creek-lagerstatte-a-diverse-late https://pubs.geoscienceworld.org/jgs/issue/current Another open access paper is: Briggs, D.E., Liu, H.P., McKay, R.M. and Witzk- 1 reply
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This was found in the Potomac group, probably Patuxent formation in PG county MD. Some historical finds between Bladensburg and Laurel, so that is the reference locations. Also some footprints found in Goddard Spaceflight Center recently, Greenbelt Md.), that would be same formation. I have some ideas, but would like to firm them up. Top, Bottom and two details.Thanks in advance.
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Hi All, This is my first post to Fossil Forum and I'm quite excited about joining your community. I'm looking for a confirmation and possible identification of a specimen recently collected as part of a survey of fossils found in coal mine tailings in southern Indiana. I think this is the posterior half of a crustacean, possibly a shrimp of some kind. Hopefully, someone here can confirm or disprove. Thanks for your consideration! Best, John
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