Concerning Rocks

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Some years ago I had a passing interest in the abstract shapes and forms rocks can take. 

Recently I was out on the Aberdeenshire coast hunting photos with a friend, who, being impressed with the rocky coastline, wondered exactly where the Highland Boundary Fault emerged at its most north-eastern extremity.

After a bit of research (particularly exploring using the BGS‘s iGeology app), I tracked it to a small headland, Garron Point, beside the golf club outside Stonehaven.

From the outside it doesn’t look like much, but on closer inspection it is awesome.

There are actually two faults – a small one at the north-eastern end of Craigeven Bay corner with Garron Point, forming a small spur off the Highland Boundary Fault which clips the coastline from the town out to sea.

On the lowland side the bedrock is metabasalt, psammite and pelite (North Esk formation) – metamorphic bedrock formed around 461-485MYa in the Ordovician period. On the highland side is gritty psammite (Glen Lethnot grit formation) – around 541-1000MYa.

The fault itself can be tracked to a matter of a few feet – a view from beside one of the golf greens shows the junction of both faults, with a strip of incredibly deformed grey rock leading away some meters rather like a line of chewing-gum.

Some of the most impressive rock outcrops I know. Toward the top-right of the frame – those cliffs are tall, especially from below! – a small fault runs diagonally down to the spray of water and out the left side; from front to back, a line of deformed pale grey rock only a foot or two wide, twisted like chewing gum, marks the Highland Boundary Fault at its most narrow only metres away from its most north-eastern extremity on land, at Garron Point headland near Stonehaven. The gnarly shapes of psammite (metamorphosed medium-grained grey former sandstone) and micro-basalt are awesome.
  • Prior to metamorphosis, this used to be sandstone. Now it forms a medium/coarse-grained rock, pale blue-green in colour, along the line of the Highland Boundary Fault.
  • This boulder marks the intersection of two fault lines; a small one, running diagonally from top-right to bottom-left, and the Highland Boundary Fault, running front to back. The zoom lens has compressed perspective, but for a sense of scale, the foreground rock in the right is maybe 15-20′ away.

My favourite image is an abstract closeup – purply-red microbasalt meeting gritty blue-green psammite in a spray of cracks and marbling lines.

Prints are available on my ShinyPhoto photo gallery: Under Pressure

Perhaps the clearest view into the workings of the Highland Boundary Fault I can think of. On the left, red-purple microbasalt (its fine cuboidal structure putting me in mind of streaky thick bacon); elsewhere the blue-green-grey of psammite and pelite, medium- to fine-grained metamorphosed former sandstones. All jumbled together with fine cracks and lines of marble hinting at the pressures involved.

Evening Stroll Photos

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In the words of a twitter friend of mine: A few photos made whilst walking for approximately half an hour with the dog.

Nothing special – just nice low evening light and details of the pastoral landscape around.

  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.
  • Photos made whilst walking the dog for approximately half an hour in golden evening sunshine.

Life in Shades of Green

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I used to make a point of closeup nature photos, simplifying the complexity of plant structure down to a few lines, in dull light. For the first time in ages, I spent most of yesterday afternoon with just the old Helios 58mm lens attached, walking around, seeing what could be seen.
Didn’t expect ladybirds to feature at this time of year.

  • Detail of broom seedpods
  • Tree structure
  • A cluster of ladybirds in a broom bush twig junction
  • Tree structure
  • Detail of broom seedpods

Lady Mary’s Walk, Crieff

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A few photos from an afternoon stroll around Lady Mary’s Walk outside Crieff, and up Laggan Hill.

River-bank shenanigins:

  • Views from the riverbank: washed-up plant matter dangling as light reflects across the water.
  • I’m pretty sure this is evidence of beavers on the River Earn – tree bark removed up to about 2.5′ above the ground with a fine repetitive chisel marking pattern remaining.
  • Sparseness: a few bright red berries remaining on bare twigs
  • I’m pretty sure this is evidence of beavers on the River Earn – tree bark removed up to about 2.5′ above the ground with a fine repetitive chisel marking pattern remaining.

Along an avenue of Beech trees

  • Details that catch one’s eye even in a well-known location: the avenue of beech trees along Lady Mary’s Walk outside Crieff
  • A well-known scene: the avenue of beech trees along Lady Mary’s Walk outside Crieff
  • A well-known scene: the avenue of beech trees along Lady Mary’s Walk outside Crieff
  • A simple silhouette: almost-bare beech tree branches and twigs, a filigree against the sky beyond.

And a favourite tree – always think it looks italicised, leaning at that angle.

One of my favourite trees up Laggan Hill – there’s something aesthetically pleasing about the way this old tree leans –

Focus-Stacking with the Fuji X-H1

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For years I’ve been a fan of superresolution – taking multiple images of a scene with subtle sub-pixel shifts and upscaling before blending to give a greater resolution photo than any one source.

One of the features I used occasionally on the Pentax K-1 was its pixel-shift, whereby the sensor moved four times around a 1px square; this gives an improved pixel-level resolution and full chroma detail at each point.

Having exchanged that for the Fuji X-H1, I still look to perform super-resolution one way or another. Hand-held HDR always works – in this case even better than either the K-1 or the X-T20 because the X-H1 permits 5 or 7 frames per bracket at ±2/3EV each, which is ideal.

But I thought I’d experiment with a different approach: focus-stacking. This way, the camera racks the focus from foreground to background in many fine steps. Keeping the focal-length the same, the effective zoom changes subtly between successive images. Essentially, where hand-held HDR varies the position stochastically in an X-Y plane, focus-stacking means pixels from the source frames track a predictable radial line in the superresolved image.

The X-H1 has focus-bracketing but leaves the blending up to the user in post. That’s OK.

First, an overview of the scene:

Scene overview: Fuji X-H1, 18-135mm lens at 127mm, f/8 narrow DoF

The X-H1 made 50 frames, focussing progressively from front to back. These were blended using enfuse:

time align_image_stack -a /tmp/aligned_ -d -i -x -y -z -C [A-Z]*.{tif,tiff,jpg,JPG,png}
time enfuse -o "fused_$base" /tmp/aligned_* -d 16 -l 29 --hard-mask --saturation-weight=0 --entropy-weight=0.4 --contrast-weight=1 --exposure-weight=0 --gray-projector=l-star --contrast-edge-scale=0.3

The results are a little strange to behold – while the effective DoF is much increased (the distant wood texture is clear) the rock detail is quite soft; I suspect some of the above numbers need tweaking.

However, with a bit of work – both enhancing the local contrast and using in-painting to tidy up the rock itself – a pleasant image emerges:

The final polished result: banded rock on wood, Fuji X-H1

A definite improvement. I may have to use it in my landscape work a bit 🙂

Lady Mary’s Walk, Crieff

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Only catching up on photos taken at the end of April…

Lady Mary’s Walk runs West from Crieff along the side of the River Earn, mostly on the flat until one reaches the foot of Laggan Hill after a mile or so, where it forms a circular route back to MacRosty Park.

At the end of April I went for a stroll to hunt bluebells.

The path was particularly pleasant – quiet, leading on through the woods.

 
 
 

As an aside, I’m sure there never used to be such a profusion of wild garlic on these Perthshire woodland nature trails 10 years ago – I only first encountered the stuff whilst out in Galloway.

I was a bit early for optimum bluebell season, but did find a few areas of good blue ground coverage:

And at the western extremity of the route there is a ruined house – it could be quite eerie given the right lighting.

West Woods of Ethie

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My friend Tom and I went for a stroll in the West Woods of Ethie in Angus. Not a woodland I’d encountered before, but it was quite magical in some ways – quite conscious of lurching from one clearing to another, surrounded by the characteristic shapes of beech trees in their green and yellow-orange autumn plumage.

For a slightly more immersive view of the woods… click this and wait a while 🙂

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On the Way to St Fillan’s

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A few months ago now, I spent a happy Saturday afternoon driving around the countryside – visited some old haunts and refreshed memories. I had it in mind to spend some time shooting the well-known statue Still by Rob Mulholland in Loch Earn at St Fillan’s, but was more taken by the landscape en route – a little mist rising off a forest, clouds so low they obscure the outlines of the mountains.

So the majority of these photos were actually taken whilst parked in a layby off the A85. But I couldn’t possibly admit to that. 😉

Around Here

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It’s been a lousy grey and wet day – definitely dreich – here, so here are a few photos of a walk I took down the road one evening a few weeks ago, on a lovely sunny day.

Graveyards? Not exactly my usual photographic cup of tea, but OK then…

Landscape is a bit more my scene, however. There’s some lovely undulating pastoral scenery around here, with views across to the distinctive shape of Ben Effray.

All photos made using the Olympus Pen-F and the four-thirds 12-60mm f/2.8 lens using 5-shot handheld HDR technique.

Birnam Hill: Details

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A handful more photos from an afternoon stroll around Birnam Hill – little things that caught my eye. There was a small burn flowing down one of the paths, mostly covered in amazing semi-fractured ice crystals; patterns abound.

Bluebells

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It’s been a slightly busy year; so busy I’m still catching up with photos made in April / May time. Much longer and it’ll suit next year instead!

Around the middle of May a group of friends and I went for a photo-stroll from Crieff out along Lady Mary’s Walk, in search of bluebells. We found some. I shot some with an infrared filter, just to see what would happen – it seems to have rendered the colours with a very olde-worlde vintage faded effect.

Around Birnam Hill: Tree Closeups

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A slight reversion to type, here. In previous lives I used to enjoy taking photos of closeup parts of trees, a study in shapes and forms.

Combined with one of my new favourite walk routes, up Birnam Hill near Dunkeld, and we have a lot of larch buds…

Testing the new mobile camera – this one shoots RAW DNG files, processed here in Darktable.