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#fridayfold

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John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/FoldFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FoldFriday</span></a> or is it <a href="https://mastodon.scot/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> ? Anyway , freshly bathed in this morning's early light, here's a lovely wee fold in kyanite-grade Moine schists above Loch Assapol in Mull. Fingertip at left for scale. 😊🥰 <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Metamorphic</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> An old picture of a limpet enjoying some beautiful folded greenschist-facies pelite in a rock pool near Thundergay, on the west coast of Arran. The pale bands are rich in fine-grained muscovite; the dark bands also have chlorite. The few rusty spots mark the position of pyrite crystals. </p><p><a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Deformation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Deformation</span></a> <a href="https://mastodon.scot/tags/Folding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Folding</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Dalradian" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Dalradian</span></a> <a href="https://mastodon.scot/tags/Arran" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Arran</span></a></p>
Dr. Dirtbag<p>Trinity, Vestal, and Arrow Peaks in the San Juans of Colorado. A <a href="https://mountains.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> cut different ways yields very different routes on the three peaks.</p>
V Martín<p>For <a href="https://mastodon.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> : twisted flysch by the islet bridge, from our recent visit to <a href="https://mastodon.social/tags/Gaztelugatxe" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Gaztelugatxe</span></a></p><p><a href="https://mastodon.social/tags/FoldFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FoldFriday</span></a></p>
Dr. Dirtbag<p>Mount Girourard from Mount Charles Stewart, an unusual <a href="https://mountains.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> in the Canadian Rockies near Banff.</p>
Dr. Dirtbag<p>Mount Birdwood, in the Kananaskis region of the Canadian Rockies, land of the <a href="https://mountains.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> .</p>
Peter L Bowden<p><a href="https://mastodon.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> seen in a new road cutting near Stornoway. </p><p><a href="https://mastodon.social/tags/Archaean" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Archaean</span></a> Lewisian gneiss is cut by mafic <a href="https://mastodon.social/tags/OuterHebrides" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OuterHebrides</span></a> dyke. Both are then folded during the <a href="https://mastodon.social/tags/Laxfordian" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Laxfordian</span></a>.</p><p>Cross cutting of the gneissic foliation can be seen in the core of the fold, whilst the limbs are concordant.</p>
berndandeweg<p><a href="https://mastodon.nl/tags/fridayfold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fridayfold</span></a> variscan folding in sst.shale series <a href="https://mastodon.nl/tags/portugese" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>portugese</span></a> zone <a href="https://mastodon.nl/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://mastodon.nl/tags/rocks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rocks</span></a></p>
Peter L Bowden<p>Tight to isoclinal <a href="https://mastodon.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> in an Archaean layered intrusion at Cnoca Breac, on the west coast of South Uist.<br>Considered to be some of the oldest rocks in the Outer Hebrides at &gt; 2900 Ma the compositional layering is still distinguishable despite strong Laxfordian reworking</p>
Peter L Bowden<p><a href="https://mastodon.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> in mylonitic Lewisian gneiss. </p><p>North-west coast of the <a href="https://mastodon.social/tags/IsleofLewis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>IsleofLewis</span></a></p>
berndandeweg<p>Look at this folded quartz vein, changing amplitude and frequency with decreasing thickness 😀 <a href="https://mastodon.nl/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> on <a href="https://mastodon.nl/tags/SilentSunday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SilentSunday</span></a> <a href="https://mastodon.nl/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://mastodon.nl/tags/fieldwork" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fieldwork</span></a> <a href="https://mastodon.nl/tags/portugal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>portugal</span></a></p>
Jorge 🇪🇺 🌍🛰️<p>Good morning. It's Friday. No, sorry... it's <a href="https://mastodon.xyz/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a>. Enjoy the superb anticlines and synclines in Baluchistan, Pakistan. </p><p>Infrared false-colour composite (looks predominantly red) over the Khude Range Fold Belt, Khuzdar Knot and Kirthar Range Fold Belt in <a href="https://mastodon.xyz/tags/Pakistan" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Pakistan</span></a>.</p><p>Images processed in EO Browser, courtesy of Sentinel Hub. Contains Copernicus Sentine-2 data</p><p><a href="https://mastodon.xyz/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://mastodon.xyz/tags/remotesensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>remotesensing</span></a> <a href="https://mastodon.xyz/tags/earthobservation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthobservation</span></a> <a href="https://mastodon.xyz/tags/sentinel2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sentinel2</span></a> <a href="https://mastodon.xyz/tags/structuralgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>structuralgeology</span></a> <a href="https://mastodon.xyz/tags/Khude" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Khude</span></a> <a href="https://mastodon.xyz/tags/Kirthar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Kirthar</span></a> <a href="https://mastodon.xyz/tags/Khuzdar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Khuzdar</span></a></p>
Vicky Veritas<p>The San Andreas fault is where two tectonic plates meet, and as an iconic Californian feature, should be easy to see and it is in places - but not like this. Along the Highway 14 freeway from Los Angeles, just north of the junction with Avenue S, the fault in all its glory is revealed in the famous Palmdale road cut. Here, millions of years-old lakebed sediments are crumpled and folded almost like a Van Gogh painting. The curl of the browns and tans of the 90 foot exposure catch every eye, and even the uninitiated know they have seen the might of the earth exposed. For better pictures and a tour of the fault, see: <a href="https://v-e-n-u-e.com/The-Great-Wave-A-Visit-to-the-San-Andreas-Fault" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">v-e-n-u-e.com/The-Great-Wave-A</span><span class="invisible">-Visit-to-the-San-Andreas-Fault</span></a></p><p><a href="https://c.im/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> <a href="https://c.im/tags/FridayFault" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFault</span></a> <a href="https://c.im/tags/PalmdaleRoadCut" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PalmdaleRoadCut</span></a> <a href="https://c.im/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a></p>
Ian G. Stimpson<p>Intensely deformed glacial sands and chalk bedrock raft bulldozed by ice under high subglacial hydrostatic pressure. West Runton, Norfolk, UK. <a href="https://social.vivaldi.net/tags/FoldFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FoldFriday</span></a> <a href="https://social.vivaldi.net/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a></p>
Ian G. Stimpson<p>Archive photo: <a href="https://social.vivaldi.net/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> <a href="https://social.vivaldi.net/tags/FoldFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FoldFriday</span></a> <a href="https://social.vivaldi.net/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a> <a href="https://social.vivaldi.net/tags/Rocks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Rocks</span></a><br>A kink fold in an ultramylonite fabric. The mylonite is from the Kvitenut Gneiss Complex of the Hardargevidda Nappe System in Hordaland, S.W. Norway. The rock dates from around 1.65Ga and was deformed during the Caledonian Orogeny in the Upper Silurian. Keele Collection</p>
Jorge 🇪🇺 🌍🛰️<p>Good morning... it's <a href="https://mastodon.xyz/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> time!</p><p>A case of serious buckle folding affecting a block of schists in a drywall I saw in <a href="https://mastodon.xyz/tags/Cornwall" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cornwall</span></a>. </p><p>The patient suffered strong deformation and didn't survive.</p><p><a href="https://mastodon.xyz/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a> </p><p><a href="https://www.jorgegines.com/fridayfold-tintagel-buckle-folding/" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">jorgegines.com/fridayfold-tint</span><span class="invisible">agel-buckle-folding/</span></a></p>
John Faithfull🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡 ✊🏼✊🏿<p><a href="https://mastodon.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> These limpets are enjoying these superb ptygmatic folds in Moine rocks east of Ardalanish Bay, in SW Mull. 😋 🤩 <a href="https://mastodon.social/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.social/tags/Deformation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Deformation</span></a> <a href="https://mastodon.social/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Metamorphic</span></a></p>
Vicky Veritas<p>Fold Friday</p><p>Anton van Tetering <span class="h-card"><a href="https://mapstodon.space/@studiohaverstraat" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>studiohaverstraat</span></a></span> reminded me it’s <a href="https://c.im/tags/FoldFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FoldFriday</span></a> (or <a href="https://c.im/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a>), my favorite day. Here’s a lovely recumbant fold in this island from Greenland. Below is a link to lots of lovely info on folded rock!</p><p><a href="https://www.geologypage.com/2015/12/geological-folds.html" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">geologypage.com/2015/12/geolog</span><span class="invisible">ical-folds.html</span></a></p><p><a href="https://c.im/tags/FoldFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FoldFriday</span></a> <a href="https://c.im/tags/RecumbantFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RecumbantFold</span></a> <a href="https://c.im/tags/Greenland" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Greenland</span></a> <a href="https://c.im/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a></p>
Faulty Jon Lewis (he)<p>A <a href="https://mstdn.social/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> for my <a href="https://mstdn.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> friends. This from Silurian of central Pennsylvania, USA. Classic Appalachian fold &amp; thrust belt.</p>
Jorge 🇪🇺 🌍🛰️<p>Variscan overturned folds in Burela, <a href="https://mastodon.xyz/tags/Galicia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Galicia</span></a>. <br><a href="https://mastodon.xyz/tags/FridayFold" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FridayFold</span></a> <a href="https://mastodon.xyz/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a> <br><a href="https://www.jorgegines.com/fridayfold-burela/" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">jorgegines.com/fridayfold-bure</span><span class="invisible">la/</span></a></p>
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