Friday fold: Clarely, an anticline
Eric Pyle sent in today’s Friday fold – Eric reports that you can find this fold seaside, near Poulatedaun, Co. Clare, Ireland. Thanks for sharing, Eric!
Friday Fold
Friday fold: Dalradian schist at Cushendun, Northern Ireland
Same beach as the Cushedun conglomerate post earlier in the week – but here we see the schist into which the rhyolite dikes intruded: It’s been folded! Happy Friday. Hope your weekend is rejuvenative and fun.
Friday fold: isoclinal flow structures in Icelandic lava
While soaking at some fine outdoor hot springs in southern Iceland (near Höfn) last week, I spied a Friday fold on the rock wall above the hot pots: Iceland is not a place where we would expect to find ductile folds in already-lithified rocks, so I’m guessing that these are folds related to flow in … Read more
Friday fold: Mesoscopic structures in the Lightning Creek Schist
There are some structural goodies here at the confluence of the Rapid River and the Salmon River in west-central Idaho. I visited these outcrops three weeks ago on a field trip after the Rocky Mountain section meeting of GSA. The rocks are the Lightning Creek Schist, a schist that’s part of the Wallowa Terrane, an … Read more
Friday fold: Riggins, Idaho
There are some folds in this stunning west Idaho landscape. Perspective is looking toward the north, more or less. See if you can find them: [gigapan id=”187745″] Link GigaPan by Callan Bentley One example that will probably be obvious at first glance is this syncline/anticline pair, differentially weathered, with subvertical axial traces, and an apparently … Read more
Friday fold: Castile Formation GIGAmacro
I’ve posted here before about the extraordinary intra-layer folds in the varved evaporite deposits of West Texas’ Permian Basin, but today I can go one better and offer a GIGAmacro look at these lovely folds: [gigapan id=”187629″] Link GIGAmacro by Callan Bentley Enjoy checking these amazing small-scale folds out. They will boggle your mind.
Friday fold: core
At the Rocky Mountain Section meeting of the Geological Society of America this week, there were several displays of interesting cores. I’m not sure where this one came from, but it had a fold in it, and since no one else had volunteered a Friday fold for this week, I took a photo: It’s standard … Read more
Friday fold: 3D syncline in Macigno Formation
Alan Pitts is the source of today’s fold, a beautiful 3D model of a differentially-weathered sycline in the Late Oligocene to Early Miocene deep water Macigno Formation from western Tuscany, Italy. Here’s a photo: Now for the 3D model, hosted by Sketchfab; After it loads, use your mouse to grab this thing and finesse it … Read more
Friday fold: Crumpled Dinwoody Formation, Sheep Mountain, Wyoming
Today for your folding pleasure, I give you two field GigaPans shot by Jeffrey Rollins, a two-time Rockies field course alumnus and Old Dominion University student working under my colleague Declan De Paor, assisted by NOVA student Bridget Gomez, during last summer’s extended GigaPan expedition at the Sheep Mountain Anticline, Wyoming. This particular outcrop was … Read more
Friday fold: Shiny pahoehoe
James Farrell is our newest Friday fold source. Today he shares a primary (not tectonic) fold – the fold is in the ropy texture of a pahoehoe flow: Those colors! What a gorgeous rock. Thanks for sharing, James! You, too, can share your folds here. Send me your images. I look forward to featuring them … Read more