Our interactive exhibits in the Active Earth gallery are a great way to learn about structural geology, including different types of folds!
#FoldFriday #LapworthRocks #Geology #Museum #EarthScience #Geoscience #FamilyFun #FamilyDaysOut
Pale whitish rock with black flecks with a black curvy bed going through it in the shape of a mirror image S. The background is pale green. At the Field Museum.
Just a beautiful fold!! I hope even non-geologists can appreciate the beauty of what pressure can do to a rock. #FoldFriday #GeoscienceBluesky ⚒️🧪
Interested in structural geology? Or maybe minerals are your mission? Our new shop includes dozens of affordable pre-loved books on a whole range of subjects, from faults to fossils!
#LapworthRocks #FoldFriday #FaultFriday #FossilFriday #museum #geology #books #reading #library #education
A rocky mountain peak with green, rocky slopes, topped by a construction crane and buildings under cloudy skies, trees are visible in the foreground. Some geologic folds in the rocks.
#FridayFold below the peak of Schilthorn mountain, Switzerland. #FoldFriday #Geology
Photograph of a chevron fault on a beachside cliff, approximately 4 metres tall
Close up of the centre of the previous photograph, showing smaller more complex folds in the shales in the folds axis
Large series of two chevron folds in a beach side cliff. The outcrop is approximately 10 metres tall
Large single chevron fold on a beach with a cave formed in the interior. Height of the outcrop is approximately 8 metres
For #FoldFriday some beautiful chevron folds from the Pembrokeshire coast
Arkle is a #mountain in the Highlands made of Lower #Cambrian quartzite overlying a much older complex of Lewisian #gneiss. Between these #rock layers there is an uncomformity, which is a buried erosional surface that shows #sediment deposition was non-continuous!
#FoldFriday #FaultFriday #museum
A photo by Ray Kenny of a ptygmatic fold in a quartz vein. Ptygmatic folds are typically complex and “worm-like,” formed when a competent (stiffer) vein, often of quartz or pegmatite, is deformed within a less competent, more ductile host rock.
Good morning Blueskyers! Here is a cool shot of ptygmatic folds in a quartz vein. Host rock: metamorphic phyllites and schists. ALT text for more info.
#photobyraykenny taken 4/18 in the Hoover Wilderness, CA
#Scape #Landscape #naturephotography #FoldFriday
#AlphabetChallenge #WeekUforUp #geology
Beautiful folds in the PreCambrian Hakatai Shale Formation in the Grand Canyon Supergroup. #photobyraykenny taken on the New Hance Trail, #GrandCanyon on March 21, 2022. #FoldFriday #FaultFriday #geology #scape #landscape
Beautiful folds in the PreCambrian Hakatai Shale Formation in the Grand Canyon Supergroup.
#photobyraykenny taken on the New Hance Trail, #GrandCanyon on March 21, 2022.
#FoldFriday #FaultFriday #geology #scape #landscape
Here is a #landscape photo with amazing #geology. Across this lake is a large chevron fold with several normal faults. These meta-sedimentary rocks were compressed by intruding granites during the Mesozoic era. #Scape #FaultFriday #FoldFriday #EastCoastKin #Sierra #nature #backpacking #photography
Here is a #landscape photo with amazing #geology. Across this lake is a large chevron fold with several normal faults. These meta-sedimentary rocks were compressed by intruding granites during the Mesozoic era.
#Scape #FaultFriday #FoldFriday #EastCoastKin #Sierra #nature #backpacking #photography
Create mountains and move landmasses with our interactive displays in the Active Earth gallery! See how folds and faults form and compare these to genuine samples.
@unibirmingham.bsky.social @artscouncilengland.bsky.social #LapworthRocks #FoldFriday #museum #geology #rocks #folds #faults
folded beds in, well, idk what it is. one of the rock types near the south col of the Old Settler. Settler Schist maybe?
how about some nice little folds for #FridayFold or #FoldFriday, whichever it is
1/2 here is a photo of upturned beds of the Redwall Formation & the Supai Group along the Butte Fault, Grand Canyon. The displacement is ~3,000 feet of offset! It is seen on the north side of the Colorado River between the Nankoweap Trail and Tanner Beach. #FaultFriday #FoldFriday #geology
1/2 here is a photo of upturned beds of the Redwall Formation & the Supai Group along the Butte Fault, Grand Canyon. The displacement is ~3,000 feet of offset! It is seen on the north side of the Colorado River between the Nankoweap Trail and Tanner Beach.
#FaultFriday #FoldFriday #geology
Radar image (Sentinel-1) courtesy of Copernicus. PNG, the Papuan Fold Belt. Contains Copernicus Data (18/2/2025)
We like fold-and-thrust belts, don't we?
The Papuan Fold Belt, in Papua New Guinea, seen on Sentinel-1 radar data (18/2/2025), where the Darai Plateau is intersected by Mt. Bosavi.
To the NE, the Strongly-Folded Belt, and the Imbricate Belt.
#Geology #FridayFold #FoldFriday #RemoteSensing ⚒️🧪
Here is a beautiful kink fold in Tapeats Sandstone in the Grand Canyon. It is a sharp angular hinge fold that looks like with a little more compression it could have been a thrust fault.
#FoldFriday #FaultFriday #GrandCanyon #nationalparks #parkchat #appreciatepubliclands
Beautiful photo! 👋 geologist neighbor here from Durango. Fun geo hashtags to follow or post are #RockinTuesday or #FaultFriday or #FoldFriday
I studied #geology to understand how mountains formed. It still gets me arm-waving. Check out the dramatic Mitten Park Fault in Dinosaur Nat’l Mon. This thrust fault pushed older rock units over younger ones & happened during the Uinta Mtns uplift.
#FoldFriday
#FaultFriday
#appreciatepubliclands
enhanced cropped view from plane window of a big recumbent fold
Google Earth view of same thing from same perspective
todays #FridayFold on #FoldFriday, a cropped and artificially enhanced view of a neat fold in the limestone near the BC-Yukon border between Whitehorse and Atlin, east-ish of Carcross. you can also find this one on Google Earth if you know where to look, although it doesn't stand out as well
It’s #FoldFriday and #FaultFriday! For those that are curious, here is a fault in the Tapeats Sandstone near Cremation Canyon in the #GrandCanyon. You can also see where the beds folded during movement along the fault.
#geology #NationalParks
A recumbent fold in the Oligocene Schisti Sericitici in the Metamorphic Tuscan Nappe at Campocecina above Carrara, Italy #foldfriday
Grey isolated exposure of sandstone in grassy area with gorse bush in background. Cross-bedding picked out by tafoni (honeycomb weathering), curved over by soft-sediment deformation.
Archive photo for #FoldFriday #FridayFold. Soft sediment deformation folding overturning cross-stratified sandstone, picked out by tafoni (honeycomb weathering). Llangollen, Wales. 🧪⚒️
A photo from one end of a large plunging anticline, showing the eroded interior and the far end of the fold.
A satellite map of the fold
Alkali Anticline from my field camp in 2018 up in the Big Horn Basin #foldfriday
Folded limestone beds in the mountains of the Three Sisters near Fernie BC, and the half-moon peeking over the ridgeline
#FridayFold or #FoldFriday either way
At the bottom of this photo, you can see squiggly/folded lines in the sandstone. This is called soft sediment deformation. It happens during or shortly after deposition & before rock consolidation. Possible causes: density differences when the sand was liquified or seismic activity. #FoldFriday
The only? thing I sometimes miss about twitter is the excellent and beautiful geology content. I present these gorgeous chevrons along the Barnhardt Trail NE of Phoenix for today’s #foldfriday
Hello #foldfriday! Here are beautiful chevron folds in the Maverick Shale in AZ. These chevrons formed during the Mazatzal orogeny (process that builds mountains by compression) ~1.65 Ga. A fun hike to observe these features is the Barnhardt Trail in the Matzatzal #wilderness #appreciatepubliclands
A snow covered mountain made of Proterozoic clastic sediments of the Windermere Supergroup, with a super prominent anticline highlighted by the snow
#FridayFold or #FoldFriday idk but here's an anticline near Ozalenka Cabin in the Cariboo Mountains west of McBride BC
2/2 On the Arctic Circle Trail in #Greenland, the #geology was phenomenal! Here is a fault plane exposing an older folding event. Hot fluids migrated along this fault plane creating rare minerals & gemstones. We found many sapphires along this fault zone.
#foldFriday #ArcticCircleTrail #ACT
