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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 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>
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