#silurian — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #silurian, aggregated by home.social.
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Los trilobites no tienen nariz, pero Spathacalymene nasuta del silúrico medio tiene una proyección en forma de lengua en la zona pregabelar que podría haber servido para levantar los sedimentos en busca de alimento. 📷James St. John #trilobite #silurico #silurian
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Can anybody tell me what this #fossil could be? My grandson discovered it in our backyard in outer #Melbourne, #Australia?
The rock in this area is #Silurian #sandstone. -
El Arctinurus boltoni fue un trilobite del Silúrico medio (432-422 MdA) que superaba los 15 cm de longitud. Este espécimen pequeño de la lutita de Rochester, Nueva York, se ha conservado cubierto por braquiópodos.🏛️Museo Americano de Historia Natural #trilobite #silurico #silurian
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Tradicionalmente, se ha interpretado que el trilobite Deiphon nadaba y flotaba gracias a su glabela llena de aceite, pero tiene unos ojos diminutos y una terrible hidrodinámica que le hubieran entorpecido. No quiere decir que otros trilobites no lo hicieran. 📷GB3D Type Fossils #trilobite #silurico #silurian
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Low Sinuosity Meandering Rivers Before Vascular Plants - Cambrian Tapeats Formation, Arizona, USA
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https://doi.org/10.1130/B38336.1 <-- shared paper
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#water #hydrology #Arizona #bars #braided #streams #Cambrian #channels #clastic #conglomerate #floodplains #fluvial #hydromorphology #sedimentation #landscape #LowerCambrian #meander #mechanism #migration #mudstone #Paleozoic #Plantae #pointbar #rivers #sandstone #sedimentary #Silurian #sinuosity #UnitedStates #USA #TapeatsFormation
@GSA -
A drawer of fossil sea-lilies, or crinoids. One of many drawers of Silurian reef fossils from the UK in the #NottNatHist Museum collections
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Upper #Silurian crinoid shell bed #Andalusia #Spain #echinoderm #fossil
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El tiempo geológico es esquivo. Intentamos medirlo utilizando fósiles, radioisótopos, yacimientos de cenizas volcánicas y secciones geológicas seleccionadas que mejor representan lo que ocurrió en un momento dado de la historia de la #Tierra. Estas secciones se denominan estratotipos y los límites importantes del tiempo geológico se marcan con puntas doradas. Hoy colocamos una punta dorada en un nuevo límite: el Aeroniano/Teliciano en el Silúrico inferior, en el afloramiento de El Pintado en Sierra Morena de #Sevilla, #Andalucía. #Silurian #geology #stratigraphy
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Silurian (Geological periods 🌍)
The Silurian is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at 443.1 Ma to the beginning of the Devonian Period, 419.62 Ma. The Silurian is the third and shortest period of the Paleozoic Era, and the third of twelve periods of the Phanerozoic Eon. As with other geologic periods, the rock beds that define the period's start and end are well ...
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My 25 years of palaeoart chronology...
Here's a study of Kingnites, commissioned in 2022 for a project I cannot talk about yet. Kingnites, is an exceptionally large (1m long) Silurian polychaete annelid.
#Art #Painting #PaleoArt #PalaeoArt #SciArt #SciComm #DigitalArt #Illustration #Dinosaurs #Palaeontology #Paleontology #Kingnites #Silurian #Polychaete #Annelid #Worm #Fossil
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Los trilobites del género Sphaerocoryphe, que vivieron entre el Ordovícico medio y el Silúrico, tienen una enorme glabela bulbosa. 📷Skye McDavid #trilobite #ordovicico #ordovician #silurico #silurian
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El Acheronauta stimulapis es un abundante artrópodo del Silúrico temprano (438-433 MdA) con un caparazón que protegía principalmente la cabeza. Posiblemente fue un carroñero o un depredador oportunista. Pudo ser uno de los primeros artrópodos con mandíbulas.📷Mikaela A. Pulsipher et al., 2022 #silurico #silurian
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Silurian (Geological periods 🌍)
The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago, to the beginning of the Devonian Period, 419.2 Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a...
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the idea that there may have been other civilizations on earth that died out is pretty cool
i don't mean humans, i mean billions of years ago
it's quite unlikely, but it's cool to think about
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When (micro)continents collide
#Silurian or #Devonian #metasediments / pellitic #schists / sulfidic schists
North Pack Monadnock, south central New Hampshire USAIntensely folded rocks
Merrimack / Central Maine Trough smashed as #Avalonia joined Laurasia to start assembling Pangea in the #Acadian #Orogeny, about 375 million years ago.
Knowing some #geology makes hiking more fun!
Normally proportioned geochemist forelimb for scale
My #photo
Fujifilm X-H1 16 mm f/1.4 @ f/4 ⅛ s ISO 200 (IBIS) -
Wonderful Early #Silurian Life
https://www.sci.news/paleontology/early-silurian-life-12311.html paper: https://onlinelibrary.wiley.com/doi/abs/10.1111/gto.12447"The #Waukesha Biota, a 437-million-year-old #fossil assemblage from #Wisconsin, USA, provides a rare glimpse into life in an ancient #lagoon."
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#Museums #musee #prehistoric #Dunkleosteous
#fossil #silurian
Dunkleosteus - my favourite prehistoric creature.
What is yours? -
Although fungi and bacteria had already made forays onto the land deep in the past, things began to get busier there in the Silurian. But these horseshoe crabs, and their larger cousins the sea scorpions, have not come to the shore to stay, but to mate and lay eggs. Unfortunately for the horseshoe crabs, they have come to the very same shore.
(5/14)
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Today's #mega...er... organisms...are prototaxites. These large, columnar fossils date to 240-350 million years, and stood 24 feet tall and 3 feet wide when they were alive. During this time period, both plants and animals on land were still quite small--meaning that #prototaxites formed the dominant feature of the land during the #Silurian and #Devonian periods.
But what exactly were these giant spires? First described in 1859, they were originally thought to be very early trees. However, their internal structure of tiny, criss-crossing tubes suggests that this is not correct. Chemical analysis also indicates that prototaxites gained their energy from diverse sources--ruling out the idea that they were plants.
This leads to the conclusion that prototaxites were giant, spire-like mushrooms--and the researchers who completed the analysis suggested that their height helped them to spread spores in an otherwise low-laying landscape.
An alternative explanation--perhaps attempting to account for the prototaxites' unusual height--suggests that they were a matted mixture of liverworts, fungus, and cyanobacteria that got rolled up by external forces and never stood upright. This has been disputed based on the fossils' anatomy and chemical makeup.
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Happy Black Country Pride Day to all the lovely Yam Yams out there!
I was reading a geology website, about Wren’s Nest, and my favourite bit was the image where they’ve labelled the location of Dudley 427,000,000 years ago with a big arrow, lol. Priorities!
#geology #Dudley #Silurian #WenlockWednesday #TheBlackCountry #BlackCountry #BlackCountryPride #BlackCountryDay
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Nostolepis sp. in Pridoli sea with some scolecodonts, crinoids and ostracods.
Drawn while doing my Master's research. I find all of these in samples I have.
#paleoart #art #photoshop #scolecodont #ostracod #acanthod #crinoids #sea #pridoli #silurian
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Silurian acanthodian scale. Possibly Nostolepis gracilis taxa. From Silurian, Pridoli, Lithuania (EU). Preparing for my Master's 2nd semester work presentation. Sadly I have found almost no acanthodian fossils (yet), so I could not go and take better pictures (with SEM).Hope to gather at least 20 scales before going there.
#Silurian #Pridoli #fossil #fossils #micofossil #microfossils #paleo #paleontology #sketch #identification #acanthod
