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pglpm<a href="https://xkcd.com/3008" rel="nofollow noopener" translate="no" target="_blank">https://xkcd.com/3008</a><a href="https://c.im/tags/xkcd" class="mention hashtag" rel="nofollow noopener" target="_blank">#xkcd</a> <a href="https://c.im/tags/proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#proterozoic</a> <a href="https://c.im/tags/palaeontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#palaeontology</a>

Planetary EcologistBoring Billion (Geological periods 🌍)The Boring Billion, otherwise known as the Mid Proterozoic and Earth's Middle Ages, is an informal geological time period between 1.8 and 0.8 billion years ago during the middle Proterozoic eon spanning from the Statherian to the Tonian periods, characterized by more or less tectonic stability, climatic stasis and slo...<a href="https://en.wikipedia.org/wiki/Boring_Billion" rel="nofollow noopener" translate="no" target="_blank">https://en.wikipedia.org/wiki/Boring_Billion</a><a href="https://botsin.space/tags/BoringBillion" class="mention hashtag" rel="nofollow noopener" target="_blank">#BoringBillion</a> <a href="https://botsin.space/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> <a href="https://botsin.space/tags/Astrobiology" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astrobiology</a> <a href="https://botsin.space/tags/1995InScience" class="mention hashtag" rel="nofollow noopener" target="_blank">#1995InScience</a> <a href="https://botsin.space/tags/PlateTectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#PlateTectonics</a> <a href="https://botsin.space/tags/GeologicalPeriods" class="mention hashtag" rel="nofollow noopener" target="_blank">#GeologicalPeriods</a>

Planetary EcologistVolyn biota (Ecosystems 🏞️)The Volyn biota are fossilized microorganisms found in rock samples from miarolitic cavities of igneous rocks collected in Zhytomyr Oblast, Ukraine. It is within the historical region of Volyn, hence the name of the find. Exceptionally well-preserved, they were dated to 1.5 Ga, within the "Boring Billion" period of the Proterozoic geological eon.<a href="https://en.wikipedia.org/wiki/Volyn_biota" rel="nofollow noopener" target="_blank">https://en.wikipedia.org/wiki/Volyn_biota</a><a href="https://botsin.space/tags/VolynBiota" class="mention hashtag" rel="nofollow noopener" target="_blank">#VolynBiota</a> <a href="https://botsin.space/tags/Volhynia" class="mention hashtag" rel="nofollow noopener" target="_blank">#Volhynia</a> <a href="https://botsin.space/tags/Ecosystems" class="mention hashtag" rel="nofollow noopener" target="_blank">#Ecosystems</a> <a href="https://botsin.space/tags/Lithophiles" class="mention hashtag" rel="nofollow noopener" target="_blank">#Lithophiles</a> <a href="https://botsin.space/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> <a href="https://botsin.space/tags/ZhytomyrOblast" class="mention hashtag" rel="nofollow noopener" target="_blank">#ZhytomyrOblast</a>

John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<a href="https://mastodon.scot/tags/DogWalkingGeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#DogWalkingGeology</a> from yesterday.... Spud has found some garnet-tastic Moine metabasic tuffs(?) or maybe an intrusion. Each knobbly bit is a large garnet crystal, but alas they are never show external crystal faces, and are always stuffed with gazillions of quartz inclusions. Still, lovely to see! <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Metamorphic</a> <a href="https://mastodon.scot/tags/Garnet" class="mention hashtag" rel="nofollow noopener" target="_blank">#Garnet</a> <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mull</a> <a href="https://mastodon.scot/tags/Moine" class="mention hashtag" rel="nofollow noopener" target="_blank">#Moine</a> <a href="https://mastodon.scot/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> 😊

Bill MinarikA very productive hour spent learning about Earth's primary productivity (organic molecules produced) over time via a talk by Peter Crockford, Carleton University.Fun fact: every carbon atom has likely be cycled through an organism ~100 times over the last 3+ billion years!Crockford et al., The geologic history of primary productivity, Current Biology (2023), <a href="https://doi.org/10.1016/" target="_blank" rel="nofollow noopener" translate="no">https://doi.org/10.1016/</a> j.cub.2023.09.040<a href="https://fosstodon.org/tags/CarletonU" class="mention hashtag" rel="tag">#CarletonU</a> <a href="https://fosstodon.org/tags/McGillUniversity" class="mention hashtag" rel="tag">#McGillUniversity</a> <a href="https://fosstodon.org/tags/Photosynthesis" class="mention hashtag" rel="tag">#Photosynthesis</a> <a href="https://fosstodon.org/tags/EarthSystemScience" class="mention hashtag" rel="tag">#EarthSystemScience</a> <a href="https://fosstodon.org/tags/Proterozoic" class="mention hashtag" rel="tag">#Proterozoic</a> <a href="https://fosstodon.org/tags/Geology" class="mention hashtag" rel="tag">#Geology</a>

Chris White<a href="https://sciencemastodon.com/tags/Mafic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mafic</a> enclave (?) in Rattlesnake Hill <a href="https://sciencemastodon.com/tags/Granite" class="mention hashtag" rel="nofollow noopener" target="_blank">#Granite</a>, <a href="https://sciencemastodon.com/tags/Massachusetts" class="mention hashtag" rel="nofollow noopener" target="_blank">#Massachusetts</a>This Devonian granite intrudes <a href="https://sciencemastodon.com/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> Dedham Granite south of <a href="https://sciencemastodon.com/tags/Boston" class="mention hashtag" rel="nofollow noopener" target="_blank">#Boston</a>. It is younger than the nearby Blue Hill Granite Porphyry. The triangular area is rich in large crystals, possibly hornblende. The blue crystals at lower left may be <a href="https://sciencemastodon.com/tags/riebeckite" class="mention hashtag" rel="nofollow noopener" target="_blank">#riebeckite</a>, another amphibole. Riebeckite gives Quincy Granite and the <a href="https://sciencemastodon.com/tags/BlueHills" class="mention hashtag" rel="nofollow noopener" target="_blank">#BlueHills</a> Range their distinctive color. All on Avalon terrane, out of Gondwana. Acadian Orogeny was Devonian. My <a href="https://sciencemastodon.com/tags/photo" class="mention hashtag" rel="nofollow noopener" target="_blank">#photo</a>

Chris WhiteAbove and upon <a href="https://sciencemastodon.com/tags/igneous" class="mention hashtag" rel="nofollow noopener" target="_blank">#igneous</a> <a href="https://sciencemastodon.com/tags/dikes" class="mention hashtag" rel="nofollow noopener" target="_blank">#dikes</a>The feature sure looked like a <a href="https://sciencemastodon.com/tags/dike" class="mention hashtag" rel="nofollow noopener" target="_blank">#dike</a> on <a href="https://sciencemastodon.com/tags/satellite" class="mention hashtag" rel="nofollow noopener" target="_blank">#satellite</a> view, and a ground check confirmed it. Probably a late <a href="https://sciencemastodon.com/tags/Triassic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Triassic</a> or early <a href="https://sciencemastodon.com/tags/Jurassic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Jurassic</a> intrusion into <a href="https://sciencemastodon.com/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> Dedham <a href="https://sciencemastodon.com/tags/Granite" class="mention hashtag" rel="nofollow noopener" target="_blank">#Granite</a>, as <a href="https://sciencemastodon.com/tags/Pangea" class="mention hashtag" rel="nofollow noopener" target="_blank">#Pangea</a> rifted. At Black Rock <a href="https://sciencemastodon.com/tags/Beach" class="mention hashtag" rel="nofollow noopener" target="_blank">#Beach</a>, <a href="https://sciencemastodon.com/tags/Hingham" class="mention hashtag" rel="nofollow noopener" target="_blank">#Hingham</a>, <a href="https://sciencemastodon.com/tags/Massachusetts" class="mention hashtag" rel="nofollow noopener" target="_blank">#Massachusetts</a>, <a href="https://sciencemastodon.com/tags/NewEngland" class="mention hashtag" rel="nofollow noopener" target="_blank">#NewEngland</a> <a href="https://sciencemastodon.com/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> USA.Satellite view from <a href="https://sciencemastodon.com/tags/AppleMaps" class="mention hashtag" rel="nofollow noopener" target="_blank">#AppleMaps</a>, <a href="https://sciencemastodon.com/tags/photo" class="mention hashtag" rel="nofollow noopener" target="_blank">#photo</a> by me.

ksircombeMore <a href="https://aus.social/tags/geotourism" class="mention hashtag" rel="nofollow noopener" target="_blank">#geotourism</a>, this time in the lovely postglacial landscape of <a href="https://aus.social/tags/Ontario" class="mention hashtag" rel="nofollow noopener" target="_blank">#Ontario</a>, <a href="https://aus.social/tags/Canada" class="mention hashtag" rel="nofollow noopener" target="_blank">#Canada</a>, specifically an island in <a href="https://aus.social/tags/SandLake" class="mention hashtag" rel="nofollow noopener" target="_blank">#SandLake</a> on the <a href="https://aus.social/tags/RideauCanal" class="mention hashtag" rel="nofollow noopener" target="_blank">#RideauCanal</a>. Always amazing to consider that around 15,000 years ago this spot would have been under at least 1000 metres of ice.The rocks at this spot are a mixture of <a href="https://aus.social/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> metasediments of the Grenville Supergroup - basically billion year old sedimentary rocks that were well baked and deformed by a major mountain building event that pre-dates the formation of Appalachian Mountains (which formed 'only' 250 million years ago). And everything is pretty much covered in lichen... makes close-up images less interesting unfortunately :-)

Tim Holt-WilsonAn awesome present from Australia - a lump of Proterozoic banded ironstone from the Marra Mamba Iron Formation (Hamersley region, Pilbara Craton, WA) - 2.4 billion years old. Layered haematite & chert are evidence of fluctuations in primordial ocean oxygenation. <a href="https://mastodon.green/tags/precambrian" class="mention hashtag" rel="nofollow noopener" target="_blank">#precambrian</a> <a href="https://mastodon.green/tags/proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#proterozoic</a> <a href="https://mastodon.green/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a>

Max<a href="https://mastodon.social/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> <a href="https://mastodon.social/tags/Landscape" class="mention hashtag" rel="nofollow noopener" target="_blank">#Landscape</a> <a href="https://mastodon.social/tags/3dBlender" class="mention hashtag" rel="nofollow noopener" target="_blank">#3dBlender</a>

Bill MinarikKatie Maloney spoke about the 950 million year old algae fossils from the Wernecke Mountains, Yukon Territory, Canada. She's reconstructing the biosphere and the spread of eukaryotes at a time before shells or any other hard parts evolved. <a href="https://fosstodon.org/tags/McGillUniversity" class="mention hashtag" rel="tag">#McGillUniversity</a> <a href="https://fosstodon.org/tags/EarthSystemScience" class="mention hashtag" rel="tag">#EarthSystemScience</a> <a href="https://fosstodon.org/tags/FossilFriday" class="mention hashtag" rel="tag">#FossilFriday</a> <a href="https://fosstodon.org/tags/Proterozoic" class="mention hashtag" rel="tag">#Proterozoic</a> <a href="https://fosstodon.org/tags/Yukon" class="mention hashtag" rel="tag">#Yukon</a>

Chris WhiteWe walked around <a href="https://sciencemastodon.com/tags/Cohasset" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cohasset</a>, <a href="https://sciencemastodon.com/tags/Massachusetts" class="mention hashtag" rel="nofollow noopener" target="_blank">#Massachusetts</a> <a href="https://sciencemastodon.com/tags/USA" class="mention hashtag" rel="nofollow noopener" target="_blank">#USA</a> in the unusually warm (50 F, 10 C) “winter” weather here in <a href="https://sciencemastodon.com/tags/NewEngland" class="mention hashtag" rel="nofollow noopener" target="_blank">#NewEngland</a>. This is an (absurdly) prosperous <a href="https://sciencemastodon.com/tags/coastal" class="mention hashtag" rel="nofollow noopener" target="_blank">#coastal</a> community just south of <a href="https://sciencemastodon.com/tags/Boston" class="mention hashtag" rel="nofollow noopener" target="_blank">#Boston</a>. The walk included lovely views across coves and marshes (including <a href="https://sciencemastodon.com/tags/invasive" class="mention hashtag" rel="nofollow noopener" target="_blank">#invasive</a> Phragmites australis and <a href="https://sciencemastodon.com/tags/peat" class="mention hashtag" rel="nofollow noopener" target="_blank">#peat</a> under <a href="https://sciencemastodon.com/tags/native" class="mention hashtag" rel="nofollow noopener" target="_blank">#native</a> <a href="https://sciencemastodon.com/tags/Spartina" class="mention hashtag" rel="nofollow noopener" target="_blank">#Spartina</a>), as well as nice exposures of the > 600 Ma <a href="https://sciencemastodon.com/tags/Dedham" class="mention hashtag" rel="nofollow noopener" target="_blank">#Dedham</a> <a href="https://sciencemastodon.com/tags/granite" class="mention hashtag" rel="nofollow noopener" target="_blank">#granite</a>, the <a href="https://sciencemastodon.com/tags/pluton" class="mention hashtag" rel="nofollow noopener" target="_blank">#pluton</a> coring most of the <a href="https://sciencemastodon.com/tags/Avalon" class="mention hashtag" rel="nofollow noopener" target="_blank">#Avalon</a> terrane in this area. <a href="https://sciencemastodon.com/tags/photo" class="mention hashtag" rel="nofollow noopener" target="_blank">#photo</a> <a href="https://sciencemastodon.com/tags/igneous" class="mention hashtag" rel="nofollow noopener" target="_blank">#igneous</a> <a href="https://sciencemastodon.com/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> <a href="https://sciencemastodon.com/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> <a href="https://sciencemastodon.com/tags/saltMarsh" class="mention hashtag" rel="nofollow noopener" target="_blank">#saltMarsh</a>

MaxProterozoic. <a href="https://mastodon.social/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a>

Lukas VFN 🇪🇺When was the first time life began to prey on each other? <a href="https://phys.org/news/2022-12-life-began-prey.html" rel="nofollow noopener" target="_blank">https://phys.org/news/2022-12-life-began-prey.html</a>A case for an active <a href="https://scholar.social/tags/eukaryotic" class="mention hashtag" rel="nofollow noopener" target="_blank">#eukaryotic</a> marine <a href="https://scholar.social/tags/biosphere" class="mention hashtag" rel="nofollow noopener" target="_blank">#biosphere</a> during the <a href="https://scholar.social/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> era: Lisa Eckford-Soper et al. <a href="https://www.pnas.org/doi/abs/10.1073/pnas.2122042119" rel="nofollow noopener" target="_blank">https://www.pnas.org/doi/abs/10.1073/pnas.2122042119</a>"We use a size- & trait-based ecosystem model to show that the <a href="https://scholar.social/tags/microfossil" class="mention hashtag" rel="nofollow noopener" target="_blank">#microfossil</a> record is most compatible with an active <a href="https://scholar.social/tags/eukaryote" class="mention hashtag" rel="nofollow noopener" target="_blank">#eukaryote</a> <a href="https://scholar.social/tags/ecosystem" class="mention hashtag" rel="nofollow noopener" target="_blank">#ecosystem</a> conducting <a href="https://scholar.social/tags/osmotrophy" class="mention hashtag" rel="nofollow noopener" target="_blank">#osmotrophy</a>, <a href="https://scholar.social/tags/photosynthesis" class="mention hashtag" rel="nofollow noopener" target="_blank">#photosynthesis</a>, <a href="https://scholar.social/tags/phagotrophy" class="mention hashtag" rel="nofollow noopener" target="_blank">#phagotrophy</a>. Marine <a href="https://scholar.social/tags/ecosystems" class="mention hashtag" rel="nofollow noopener" target="_blank">#ecosystems</a> 1,700-780 Ma were far more active, diverse than generally thought."

Sisyphus with a HatThis is a very interesting photo. Take on the beach at Ballyliffin, Donegal, it shows the contact between the Termon Formation in the foreground and the Slieve Tooey quartzite Formation on the background. The Termon consists of pellitic schists, and the contact between the 2 is define by a fault, with the top of the older Slieve Tooey being sheered as well. Both formations are part of the Argyll Group, the middle group of the Neoproterozoic Dalradian. And to crown it off, very near the actual contact, in the center of the photo, we have a Rock pipit posing. <a href="https://c.im/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> <a href="https://c.im/tags/rocks" class="mention hashtag" rel="nofollow noopener" target="_blank">#rocks</a> <a href="https://c.im/tags/shearzone" class="mention hashtag" rel="nofollow noopener" target="_blank">#shearzone</a> <a href="https://c.im/tags/fault" class="mention hashtag" rel="nofollow noopener" target="_blank">#fault</a> <a href="https://c.im/tags/neoproterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#neoproterozoic</a> <a href="https://c.im/tags/proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#proterozoic</a> <a href="https://c.im/tags/quartzite" class="mention hashtag" rel="nofollow noopener" target="_blank">#quartzite</a> <a href="https://c.im/tags/pellite" class="mention hashtag" rel="nofollow noopener" target="_blank">#pellite</a> <a href="https://c.im/tags/birds" class="mention hashtag" rel="nofollow noopener" target="_blank">#birds</a> <a href="https://c.im/tags/birding" class="mention hashtag" rel="nofollow noopener" target="_blank">#birding</a> <a href="https://c.im/tags/birdwatching" class="mention hashtag" rel="nofollow noopener" target="_blank">#birdwatching</a> <a href="https://c.im/tags/birdphotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#birdphotography</a> <a href="https://c.im/tags/pipit" class="mention hashtag" rel="nofollow noopener" target="_blank">#pipit</a> <a href="https://c.im/tags/rockpipit" class="mention hashtag" rel="nofollow noopener" target="_blank">#rockpipit</a> <a href="https://c.im/tags/irishbirds" class="mention hashtag" rel="nofollow noopener" target="_blank">#irishbirds</a> <a href="https://c.im/tags/birdsofireland" class="mention hashtag" rel="nofollow noopener" target="_blank">#birdsofireland</a> <a href="https://c.im/tags/irishgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#irishgeology</a>

Peter L BowdenOne of my favourite <a href="https://mastodon.social/tags/Fridayfold" class="mention hashtag" rel="nofollow noopener" target="_blank">#Fridayfold</a> locations in the Åland Islands, between Finland and Sweden. Flattened pillow lavas buckled by later minor folding. <a href="https://mastodon.social/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener" target="_blank">#Proterozoic</a> <a href="https://mastodon.social/tags/SvecoFennian" class="mention hashtag" rel="nofollow noopener" target="_blank">#SvecoFennian</a>

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