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Showing results for tags 'rhynie chert'.
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400 million-year-old fossil reveals the evolution of Fibonacci spirals in plants
Oxytropidoceras posted a topic in Fossil News
400 million-year-old fossil reveals the evolution of Fibonacci spirals in plants Tejasri Gururaj, June 19, 2023 The paywalled paper is: Turner, H.A., Humpage, M., Kerp, H. and Hetherington, A.J., 2023. Leaves and sporangia developed in rare non-Fibonacci spirals in early leafy plants. Science, 380(6650), pp.1188-1192. Yours, Paul H.-
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- asteroxylon
- devonian
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The Rhynie Chert preserves one of the oldest terrestrial ecosystems, which is a hot spring environment. It's Lower Devonian, and the oldest know harvestman was also found there. These are some photographs of my thin sections from this environment. This first thin section is one of my favourites, it has several Aglaophyton major plants that contain fungal cysts of Palaeomyces gordoni, containing spores. These are more Aglaophyton major cross sections. In this and the one above, there are a few vascular bundles, these consist of thin-walled protoxylem cells, surrounded by thicker metaxylem cells, which is then surrounded by the phloem. In the cortex of some of these is the mycorrhizal fungi Glomites rhyniensis. Their hyphae look like a darker-coloured ring. These both are Aglaophyton major. This one has Aglaophyton major, as well as Retusotriletes spores and some more Palaeomyces gordoni cysts without spores. This section contains a few Retusotriletes spores. This has the plant Horneophyton lignieri in it, which had a rhizoids instead of roots. In the upper left of this one is an arthropod coprolite consisting mostly of spores. Lastly, this is a piece of the Rhynie Chert containing Aglaophyton major.
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- aglaophyton major
- cross section
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Hi All, This specimen is from a pile of tumbled rocks, no provenance. My best is guess that is Rhynie chert with sections of silicified fungus or early plants. However, it might just look similar. No clear cellular structures are visible. The circles are 13 and 4 mm in diameter. An expert opinion would be much appreciated. Thanks in advance!
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Hi everyone I think I just found a new hobby With my latest fossil delivery I recieved quite a lot of microfossils & matrix vials as the world of microfossils was something that I have been long interested in. So a 2 weeks ago I finally ordered my first microfossils for which I reserved a special drawer in my archive cabinet. So here is a recapp of what I all got: 3 vials of permian material from Waurika, Oklahoma 1 vial of permian material from The red beds of Archer County, Texas 1 small vial of Conodont rich Mississippian material from the Chappel Limestone formation, Texas 1 small vial of Cretaceous Lower Gault Clay, East Wear bay, Folkestone, Kent, UK A micropalaeontology slide with Jurassic Blue Lias matrix rich in holothurian material. A thin section of an Ostracods filled Elimia snail from the Green River Formation in Wyoming A thin section from the Rhynie chert of Scotland which should contain preserved parts of the plant Aglaophyton major and perhaps even other species. I also got a lot of Bull Canyon micro fossil teeth and 2 cretaceous mammal teeth from Hell Creek In this topic you will be able to follow my path through this newly discovered hobby as I will post my finds and progress Currently I am only working with a clip-on cellphone microscope, but I do plan on getting a professional microscope in the next few months! (Tips are always welcome) So let's put on our Ant-Man suit and explore the microfossil realm So here are some of the first pictures I made of some of the microfossils Starting with the thin slices! Thin slice with Ostracon filled Elimia tenara snail from the Green River Formation, Wyoming Thin slice with Aglaophyton major from Rhynie Chert in Scotland
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- ant-man
- barbclabornia
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Tentatively putting feelers out there for the possibility of trading for a Cooksonia plant fossil and/or rhynie chert plant fossil material. I may be up for considering other plant material, but those are the main two I'm after. I have a little bit of everything except for invertebrates or dinosaur material (though I do have a little bit of fossil plant material from the Jurassic), so feel free to shoot me a pm and we can discuss things further. Thanks!