Pete Bowden

The city built upon Slovenian oak?

A very popular choice on the Student Association jukebox (remember those?), back in the early 70s at Dundee.
Unfortunately I can't find my copy of the "Best of Mountain" LP, but I remember it being a favourite of mine.

The Lewisian, (part of the Pre-Cambrian), is named after the Isle of Lewis in the Outer Hebrides and the Caledonian mountain chain is named after the Latin name for Scottish Highlands.

🤣

I saw my first rhyolite in Glen Coe😃⚒️

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!!!

The snow covered triangular peak of Schiehallion on a bright spring day.

One of my favourite Scottish mountains with fantastic Dalradian geology on the northern flanks.

I moved to the Isle of Lewis to get away from the heatwaves😅🤦‍♂️

Yes😀

Taken there, in the mid 70s, as an interesting historical diversion whilst on a geological field trip around Ben Lawers and Glen Lyon.

Bright yellow flowers amongst the grass on the headland north of Mealasta slipway, west coast of the Isle of Lewis. Look like the Bog Asphodel, (Blioch in Gaelic), in a recent post by Frank Rennie.

I knew if I kept watching your posts for long enough I would get an identification for these beautiful flowers spotted near Mealasta slipway😀

A grey meta gabbro shows speckled appearance towards top of the photo. The minerals become elongate and to define a curved tectonic fabric which becomes smeared out in a shear zone seen in the lower part of the photo. Seen on the west coast of the Isle of Lewis.

Lewisian meta basic/ultrabasics showing similar shear zone fabrics can be seen on the west coast of the Isle of Lewis.
The contrasting colours of the feldspars and mafic minerals really emphasise the strain variations🤓.
I haven't seen any of the thin discreet shear zones yet, but I live in hope😉

Some would call it a gift😉

I always think of sheeted dykes with single chilled margins as the key feature of oceanic crust, (ophiolite), but that view may be out of date now🤷‍♂️

Brown and dun coloured outcrop of meta-ultrabasic, Maraig, Isle of Harris.

In a land of "Undifferentiated grey gneiss" the occasional dun coloured outcrop is much appreciated😉⚒️.
@earlyearthtim.bsky.social for scale, at Maraig, Isle of Harris.

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

Thin sections - absolutely the way to go🤓. I miss my microscope and the increased certainty that it brought to petrographic studies.
In the pale grey "vein" and just to right of centre there is a porphyroclast with a blue tinge and sort of granular texture - do you think this might be protolith?

A worthy GigaPan candidate? So many interesting features that are not quite in focus.
Might the sub horizontal band of pale grey v. fine grained material be pseudotachylite (possibly reworked)? or is it ultramylonite/cataclasite?
Have you seen similar rocks in situ nearby or is this sample exotic?

Small tributary stream building a delta into larger brown, (peat stained) stream. The sedimentary features observed in the yellow sand are emphasised by black heavy mineral concentrations.

Not really my field, but can't resist taking photos of sedimentary processes, especially where there are sufficient heavy minerals to emphasise the features.
This is also about a metre across.

Had to look that up 😄. They are probably a little bit more random; I fell down a rabbit hole trying to identify what sort of lichen they were - I eventually opted for Rhizocarpon geographicum the common map lichen. In these examples Balkanisation springs to mind.

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.

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.

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.
🧪⚒️

And just now, a chain of coincidences appears; strong posts and "eagles don't perch on posts🤦‍♂️"

www.facebook.com/watch?v=1607...

This morning I stumbled across a nice video of applying of the laws of physics to the post removal challenge🤔
www.facebook.com/watch?v=4915...

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

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

What a coincidence, just sent email last night, to council archeologist, about similar occurrence on Baleshare.
Think it may have been uncovered by the winter storms.
Similar finds nearby were previously excavated.

Every day is a good day to be in Scotland, but now I get to wear 😎

Same here, though the right hand rule was something to do with magnetic fields and electric current when I was a student 🤣

How about "glomerocryst" for the original aggregation?
If the subsequent deformation produced mylonites I suppose the clots/glomerocrysts might become "glomeroclasts"?

999

Strike slip jig?☘️

The "running water almost sounds like music" brings back memories of conducting fieldwork in northern Norway. Prolonged periods (> 7 days), working in isolation meant I suffered from various auditory "hallucinations" and the musical streams and rivers was the most vivid.