iiinova — where your digital self keeps evolving

Reposted by Pete Bowden

Adrian Littlejohn @yorksfella59.bsky.social · 07/09/2026

I am bloody proud to be an #RNLI supporter and member! These brilliant men and women have quite enough to cope with without being harassed by the scum of the earth. Their only concern is to help people in danger at sea - not check passports first! Which is how it should be. Please RT if you agree🙏

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Reposted by Pete Bowden

Kim Cobb @kimcobb.bsky.social · 17/12/2025

It is hard to overstate how critical @ncar-ucar.bsky.social is to climate science in the US and around the world. It's the beating heart of our field. Generations of scientists have trained there, and almost everyone I know relies on deep collaborations with NCAR scientists. It's end is unthinkable.

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Reposted by Pete Bowden

The Megalithic Portal Ancient Sites & Stones @megalithic.bsky.social · 26/11/2025

🏆Win🏆the perfect Christmas 🎄 gift for a stones enthusiast: STONE LANDS (on the Waterstones and Telegraph Best Books of 2025 lists) AND ALSO THE OLD STONES (The Megalithic Portal guide, winner of Current Archaeology Book of the Year) To win a signed (and dedicated if you like) copy of both books… 1/

Win a copy of STONE LANDS (on the Waterstones and Telegraph Best Books of 2025 lists) AND ALSO
THE OLD STONES (The Megalithic Portal guide, winner of Current Archaeology Book of the Year)

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Reposted by Pete Bowden

Rhyolite_Prof @edithrojas.bsky.social · 26/07/2025

Geology people who do we you know in Edinburgh so that we can connect and go to Siccar point together. Do your thing social media!!!

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Pete Bowden @peterlbowden1.bsky.social · 30/05/2025

When viewed from this, (opposite), side the large #FridayFold resembles a rock formation seen in the #MonsterHunterWilds computer game. ⚒️🧪

Large open fold in grey and brown Lewisian gneiss contorts the foliation. The outcrop resembles a rock formation seen in the "Monster Hunter Wilds" computer game

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Pete Bowden @peterlbowden1.bsky.social · 12/05/2025

Not usually an admirer of lichen as they obscure the geology, but these eye catching colonies bear testament to the fine air quality here in the Outer Hebrides. 🧪⚒️

Pale brown to fawn coloured polygonal shaped lichen colonies covering an outcrop of Lewisian gneiss on the Isle of Grimsay in the Outer Hebrides. The units are generally between 5mm and 15mm.

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Pete Bowden @peterlbowden1.bsky.social · 18/04/2025

Live from the field, #FridayFolds on Berneray, Outer Hebrides. Sheared Lewian gneiss. Waiting for tide to go out 😎

Banded black, grey and white gneiss shows minor S shaped folds in sheared Lewisian gneiss.
Berneray, Outer Hebrides.

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Reposted by Pete Bowden

Dr. Wendy Bohon @drwendyrocks.bsky.social · 18/02/2025

I’m working hard to find glimmers (micromoments of joy, peace, and happiness) and I wanted to share one of today’s glimmers. Here is a river otter sunning himself on the banks of the American River.

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Pete Bowden @peterlbowden1.bsky.social · 03/02/2025

A beautiful example of an Outer Hebrides dyke cutting the foliation in Archaean #Lewisian gneiss. Although folded by later Laxfordian deformation both the dyke and a thin apophysis exhibit near perpendicular angular discordance in the fold hinge, becoming concordant in the limbs. Isle of Harris. ⚒️🧪

A black Outer Hebrides dyke cuts across the pre-existing foliation in grey Archaean Lewisian gneiss. Thin apophysis (offshoot) and the hinge zone of the folded dyke exhibit near perpendicular angular discordance to the foliation.
These rocks were folded during Laxfordian deformation and strong flattening in the limbs of the folds brought the contact of the dyke and the foliation into concordance.
This outcrop is located west of the village of Rhenigidale, Isle of Harris, Outer Hebrides.

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Pete Bowden @peterlbowden1.bsky.social · 31/01/2025

A #FridayFold fresh from today's first field excursion of the new year. The black Outer Hebrides Basic dyke was intruded into the paler grey Archean Lewisian gneiss prior to Laxfordian deformation which produced the tight recumbent fold. Near Rèinigeadal, (Rhenigidale), N. Harris, Outer Hebrides.

Black Outer Hebrides Basic dykes were intruded into the paler grey Archean Lewisian gneiss prior to Laxfordian deformation. At this location the deformation produced tight recumbent folds especially in the darker rocks.

Approximately 0.5km south west of the village of Rèinigeadal, (Rhenigidale), N. Harris, Outer Hebrides.

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Pete Bowden @peterlbowden1.bsky.social · 24/01/2025

Interesting barometer reading this morning as storm Éowyn passes by😵. Adjusting for elevation of 67m this is equivalent to approx. 948hPa at sea level. I think I might set it to show sea level equivalent in the future.

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Pete Bowden @peterlbowden1.bsky.social · 23/01/2025

My OH is a keen walker and getting quite good at photographing interesting geological locations. This has gone to the top of my Spring excursion list. Pink #Laxfordian granitic intrusions invading #Lewisian gneisses and amphibolites. Mangersta, #IsleofLewis ⚒️🧪

Tall grey cliffs being battered by a rough sea. Older grey Lewisian gneisses and black amphibolites are intruded by salmon-pink granitic pegmatites and aplites of Late-Laxfordian age.
The cliffs are located near the Mangersta bothy on the west coast of the Isle of Lewis, Scotland.

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Pete Bowden @peterlbowden1.bsky.social · 27/12/2024

Walks on Boxing Day have become a lot more interesting since moving to the #IsleofLewis

Grey and pale green banded rocks (mylonitic gneiss) contorted by folds and sub horizontal thrusts.
Traigh Shanndaigh near Ness, Isle of Lewis.

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Reposted by Pete Bowden

Rob Thomas @rokdok.bsky.social · 24/12/2024

Friends, Consider joining the Montana Geology Facebook group! Started in the spring of 2020, we now boast about 20K enthusiasts! We only hope to spark interest in Montana Geology! We shall continue down this path in the new year. All the best…Rob Thomas www.facebook.com/share/g/15TP...

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Reposted by Pete Bowden

Rob Thomas @rokdok.bsky.social · 17/12/2024

The Stillwater Complex, a 2.7 billion year old ultramafic-mafic layered intrusion in Montana. Check it out. www.facebook.com/share/p/15V1...

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Pete Bowden @peterlbowden1.bsky.social · 13/12/2024

Spot the refolded isoclinal #FridayFold. Traigh Shanndaigh near Eòrapaidh (Eoropie), #IsleofLewis ⚒️🧪 #Lewisian #Geology

Predominantly grey rock has yellow coloured bands and porphyroclasts picking out a mylonitic fabric which has been repeatedly folded. Early isoclinal folds, with near parallel limbs, have been tightly tightly refolded.

The southern end of the beach has some of the best folding I have seen, (when not obscured by sand). The beach, Traigh Shanndaigh, near Eòrapaidh (Eoropie) is located at near the top (northern end) of the Isle of Lewis and faces the Atlantic.

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Pete Bowden @peterlbowden1.bsky.social · 28/11/2024

Traigh Iar, Udal, North Uist, Outer Hebrides

A deserted sweeping bay with pale sandy beach backed by high sand dunes covered in Marram grass. The sea is dark turquoise to Prussian blue in the sunlight.

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Pete Bowden @peterlbowden1.bsky.social · 24/11/2024

Makes a great display area😍 My local library is really gneiss

A selection of books is displayed on a large slab of grey and pink Lewisian gneiss situated in the centre of Stornoway public library.

The large block was sourced from a local quarry and has some cut and polished surfaces which show the tectonic foliation and some minor folds. A pink pegmatite vein in the centre of the top surface cuts across the gneissic foliation.

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Reposted by Pete Bowden

Frankie Butler @frankiebutler.bsky.social · 21/11/2024

I’m so incredibly keen to learn the Irish language in person this summer 😊 Does anyone have any recommendations for courses over in Ireland? 🇮🇪 #irish #gaeltach #gaeilge #gaelic

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Pete Bowden @peterlbowden1.bsky.social · 22/11/2024

There are many larger folds in the #Lewisian gneisses around Cunndal Bay, #IsleofLewis, but these #FridayFolds are the best exposed, (cleanest) I've seen, so far. ⚒️🧪 #Geology

Banded grey Lewisian gneiss with some thicker layers of white or pink granitic pegmatite and black amphibolite show complex folding.
In some cases the folds are affected by shearing.
The outcrop is well exposed and clean, having been wave washed to keep it clear of surface algae/shellfish/seaweed.
The compass-clinometer scale is 15cm long.

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Reposted by Pete Bowden

Daniel | ScienceSocks et al. @sciencesocks.bsky.social · 20/11/2024

✨#JWST ornament giveaway! 🤩 My first Bluesky exclusive giveaway! Up for grabs are 5 of my best-selling holiday ornaments! 💫 How to participate: 1) follow me 2) enter here sciencesocks.co/pages/giveaway 3) like/repost 🚨 P.S.: please consider sciencesocks.co for your holiday shopping :) 🔭🐡🧪#bsnm

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Pete Bowden @peterlbowden1.bsky.social · 19/11/2024

The sea cliffs on the west side of the #IsleofLewis provide some spectacular cross sections through #Lewisian gneisses. I guess I'm putting a drone at the top of my Xmas list. ⚒️🧪 #Geology

A spectacular seascape on the west coast of the Isle of Lewis with waves breaking on rocks at the base of high cliffs.
The grey and pinkish grey Lewisian gneisses show complicated folding and faulting, often offsetting dark grey to black Outer Hebridean dykes, (also Lewisian in age these were formerly called Scourie dykes).

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Pete Bowden @peterlbowden1.bsky.social · 17/11/2024

At the other end of the strain spectrum it becomes really difficult to identify these banded rocks as originally being pillow lavas😉 ⚒️🧪 #Geology

Alternating thin black, grey and pale brown bands are disrupted by a shear zone along the axial plane of a fold, (scale is approx. 15cm long). These pillow lavas are so severely flattened that it is almost impossible to identify the original pillow structures. Found in a Svecofennian greenstone belt, located on the island of Kumlinge in the Åland Islands, Finland.

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Pete Bowden @peterlbowden1.bsky.social · 16/11/2024

Yesterday's post showed flattened pillow lavas crumpled by late stage minor folds. @callanbentley.bsky.social asked if there are less deformed rocks nearby which show they are indeed pillow lavas. Indeed there are😍 ⚒️🧪 #Geology

A clean coastal exposure shows irregular ellipsoid pillow lavas. The pillows are grey to greenish-grey in colour, occasionally there are fawn - pale brown rims. The pillow shapes are often emphasised by the contrasting dark-grey to black interstitial material between the pillows.
The outcrop is approximately 2m. wide towards the top of the photo.
These basic volcanic lavas form part of a mixed sequence of supracrustal rocks in a greenstone belt of Svecofennian age.
Located on the northern coast of Kumlinge, Åland Islands, Finland.

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Pete Bowden @peterlbowden1.bsky.social · 15/11/2024

This was the first geological photo I posted on Twitter back in January 2021. #FridayFold Small scale folding of flattened pillow lavas, (scale approx. 8cm long). Svecofennian greenstone belt, Kumlinge, Åland Islands, Finland. ⚒️🧪 #Geology

Alternating black, grey and pale brown bands are crumpled by small scale folding (scale is approx. 8cm long). These are severely flattened pillow lavas in a Svecofennian greenstone belt. located on the island of Kumlinge in the Åland Islands, Finland.

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Pete Bowden @peterlbowden1.bsky.social · 13/11/2024

The volcanic features on the Fife coast include this fine example of a basalt dyke intruded into volcanic tuff. The en-echelon disposition is picked out by the lichen which favours the basalt dyke. ⚒️🧪

A dark grey basalt dyke is covered in pale greenish grey lichen with occasional patches of yellow lichen . The dyke cuts through green unbedded volcanic tuff containing fragments up to 25cm in diameter.
The dyke exhibits an "en-echelon" arrangement where it pinches out and then continues with a slight offset.
Scale is 150cm walking pole (to left of dyke).
This location is very close to the coastal path below St Monans church.

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Pete Bowden @peterlbowden1.bsky.social · 12/11/2024

Occasionally I (re)visit rocks that are not Pre-Cambrian. As a student in Dundee I was often taken on field trips to the Fife coast to see the wide range of sedimentary and volcanic rocks. These Carboniferous cross bedded sandstones are found near St Monans, south of St Andrews. ⚒️🧪 #Geolgy

Pale buff coloured sandstones of Lower Carboniferous age show repeated units of cross-bedding, (scale given by 10cm red & white compass clinometer in centre).

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Pete Bowden @peterlbowden1.bsky.social · 11/11/2024

Thoroughly enjoyed reading this engaging and thought provoking book.

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Pete Bowden @peterlbowden1.bsky.social · 08/11/2024

A bonus #FridayFault from the west coast of the #IsleofLewis The sharp eyed amongst you may have spotted this little fault pair in the vertical limb of the #FridayFold I posted earlier. ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 08/11/2024

A #FridayFold from the west coast of the #IsleofLewis. The dark mafic #OuterHebrides dykes were intruded into the #Lewisian gneiss. The original cross cutting relationship has been brought into near concordance during subsequent #Laxfordian deformation which also generated these folds. ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 07/11/2024

@calamitaman.bsky.social Hope these #Lewisian gneisses seen on Berneray in the #OuterHebrides are what you are hoping to see🤔. They had certainly experienced a long and complicated tectonic history before being intruded by the late #Laxfordian pegmatite. ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 02/11/2024

@barraisland.bsky.social have just joined Bluesky. Home of the best exposures of #pseudotachylite in the UK, around Greian Head and Seal Bay.⚒️🧪 The beaches aren't bad as well😎

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Pete Bowden @peterlbowden1.bsky.social · 18/10/2024

#FridayFold in #Archaean amphibolites seen on the west coast of the #IsleofLewis. ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 16/10/2024

Tiger stipe camouflage isn't really effective on the west coast of the #IsleofLewis👀 Compositional (rhythmic?) banding is preserved locally within an occurrence of #Lewisian "Older Basic Suite" meta-basics/ultrabasics. #Archaean ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 03/10/2024

Looks like another fine Hebridean morning🌄. Looking east across Broad Bay to Point. A week ago we were exploring the NW Highlands Geopark around the mainland mountains silhouetted on the horizon😍 #IsleofLewis #Suiliven #Canisp #Assynt ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 27/09/2024

#FieldtripFriday revisited. In 1975 I visited this unconformity on the north side of Loch Assynt where #Torridonian sandstones and conglomerates overlie #Lewisian gneiss. I even spotted the ledge I climbed onto to point out the unconformity surface to my classmates. #Geology ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 10/09/2024

Attenuation of the limbs in these folds has left some of the fold hinges essentially floating. #Laxfordian folding on the north west coast of the #IsleofLewis #TectonicTuesday #Geology #Lewisian #Folding ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 07/09/2024

🤦‍♂️ Always forget to include these for greater visibility ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 06/09/2024

#FridayFold seen in a new road cutting near Stornoway. #Archaean Lewisian gneiss is cut by mafic #OuterHebrides dyke. Both are then folded during the #Laxfordian. Cross cutting of the gneissic foliation can be seen in the core of the fold, whilst the limbs are concordant.

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Pete Bowden @peterlbowden1.bsky.social · 05/09/2024

A pair of shear zones cutting across the complicated fabric in garnetiferous metasediments belonging to the Harris Granulite Belt. I keep spotting new things on the larger outcrop photo 🤔but luckily it is only a 90 minutes drive to go back #ShearZones #Granulites #OuterHebrides

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Pete Bowden @peterlbowden1.bsky.social · 28/06/2024

Brought back some #IgneousGin A suitable souvenir to remind me of our stay in the middle of #Ardnamurchan Paleocene intrusion centre #3. Our cabin was next to the distillery and was surrounded by ring intrusions giving the appearance of a caldera.

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Pete Bowden @peterlbowden1.bsky.social · 24/05/2024

Tight to isoclinal #FridayFold in an Archaean layered intrusion at Cnoca Breac, on the west coast of South Uist. Considered to be some of the oldest rocks in the Outer Hebrides at > 2900 Ma the compositional layering is still distinguishable despite strong Laxfordian reworking

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Pete Bowden @peterlbowden1.bsky.social · 20/05/2024

Last month I revisited the second best #pseudotachylite location in the Outer Hebrides, on the west coast of South Uist. I tried to pay more attention to the actual faulting this time🤓, but the breccias are always more photogenic😍 ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 08/03/2024

#FridayFold in mylonitic Lewisian gneiss. ⚒️🧪 North-west coast of the #IsleofLewis

A group of small folds picked out by a pale layer in predominantly grey mylonitic Lewisian gneiss. The outcrop is on a beach, north-west Isle of Lewis, Scotland.

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Pete Bowden @peterlbowden1.bsky.social · 07/03/2024

First field day of the year and found a gneiss spot for lunch. The north west coast of the Isle of Lewis never disappoints.

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Pete Bowden @peterlbowden1.bsky.social · 09/01/2024

Another crisp Hebridean dawn. The mountain tops in the distance are approx. 60-80km away and include Canisp and Suilven (towards the left hand side).

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Pete Bowden @peterlbowden1.bsky.social · 07/11/2023

#TuesayTufa, on the Isle of Barra in the Outer Hebrides, frequently obscures the Lewisian gneiss I came to see🙄 Despite this I have a soft spot for precipitated carbonate rock types, thanks to Dr Colin Braithwaite's enthusiasm as he explained a tufa deposit, found on a mapping course, in 1975.

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Pete Bowden @peterlbowden1.bsky.social · 30/10/2023

This #MeltyMonday here is a #pseudotachylite vein with brecciated "xenoliths", cutting across the foliation in Lewisian gneiss. The vein extends for about 3m before disappearing under the beautiful white sands of Seal Bay on the W. coast of Barra, in the Outer Hebrides, Scotland. #Geology ⚒️🧪

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Pete Bowden @peterlbowden1.bsky.social · 27/10/2023

Slickensides in the Dalradian metasediments at Macduff in NE Scotland. #FridayFault #Geology ⚒️🧪

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