Showing posts with label boulder lobes. Show all posts
Showing posts with label boulder lobes. Show all posts

Wednesday, 24 December 2014

Why?

The southern slopes of the Black Mountains were visited, again.  Which raises the question - why?  The answer is complex.  This area of the Black Mountains has a suite of landforms which appear to relate to phenomena associated with a very cold climate.  Debris from rock slope failures - possibly paraglacial or seismic in origin - appears extensively modified by periglacial processes. More surprisingly, Table Mountain is also thought to be a landslide, resulting from the down wasting of a valley glacier. Both events are thought to have occurred towards end of the Devensian stadial, but there are also alternative theories, it's an interesting wander and the landform suites possibly relate to a number of climatic events.

There are also the insights along the route, from the impact of farming - Ffridd wall, hedge laying, woodland management and relating the the underlying geology with flora. There is also the intangible pleasure of observing the rich tapestry of nature, viz on this trip; a Red Kite shadowed by two Ravens; a Wren foraging in the block slopes; a Fox crossing a distant field; a field conspicuously littered with Mole hills; Fairy inkcaps in a decaying Oak, berry laden Hawthorns, hill ponies grazing, scat on a prominent boulder - the lichen community reflecting a nutrient rich environment and hinting strongly that this boulder has demarcated an animals territory for a while ...

There's also the benefit of stretching the legs and schlepping the photography kit helps puts some debit in the calorific bank, with the festive season calorific binge looming...

Fairy Inkcaps ~ Leica apo macro elmarit 100/2.8


Leica vario elmar R 21-35mm Asph

Then there's the creative itch to be scratched, making a photograph, especially with the quality of light around the winter solstice, when the sun is at its lowest zenith, with a backdrop of broken cloud, rain showers, sunset and with good fortune, there's real potential for atmosphere. The good fortune is light shining through a break in the cloud illuminating the scene. My fortune on this trip was mixed, well broken cloud on the ascent, the first image captures the last light before a hill spur shadow falls across the boulder lobe. The second image has warm but weak sunlight filtered through cloud, the main sunbeam was slightly higher up the hillside, the cloud was failing to breakup sufficiently over the Brecon Beacon massif to the WSW.

Leica vario elmarit R 28-90 Asph

I thought that was the light gone for this trip, the cloud seemed unbroken to the south west, obscuring the sunset and so made my way back across the block slope, as I wanted to look at possibilities for a dawn scenario. On the way some 'Dog Lichens' (Peltigera membranacea) caught my eye.
Dog Lichens ~ Leica vario elmarit R 28-90 Asph


Sunset was a non event, but the cloud was breaking up to the south and dusk provided a display of red/magenta lighting reflected from and diffused by the clouds, a welcome and unexpected bonus. The wind eased too, which was helpful as exposure times were in the order of 4 to 8 seconds duration in the gloaming light.

 Leica vario elmarit R 28-90 Asph 


 Leica vario elmarit R 28-90 Asph 

The opportunity doesn't arise that often, but it is interesting to make images in the colours of dusk, the human eye doesn't pick up the colours as well as the camera sensor and for this trip it was definitely worth waiting around for.

Sunday, 14 December 2014

Showing willing

Two successive trips, both to the same location and both with a forecast of broken cloud and sunshine.

1st trip
The clouds indeed were breaking up, there just wasn't enough cloud and the sky was probably 95% cloud free, which offers the prospect of distinctly uninspiring cool blue shadows and cyan sky.
The cloud breaking up















It's fair to say my inspiration level dimmed a bit and I abandoned the big view for what was on offer on the ground, amongst the boulder lobes.
Lichen community

















2nd trip
Was a sky of unbroken cloud, but with blue skies to the West, there was a tantalising prospect of the cloud breaking up or clearing,  towards sunset.  The diffuse light was more suited to studies of the ecology of the upland environ and the Ffridd wall provided some inspiration.
Ophioparma ventosa











Parmelia saxatilis with lichenous fungi









































Moss and lichen community




Moving on up onto the open hillside, above the bracken line and into grassland, heavily grazed by hill ponies and sheep, but crucially never improved with fertiliser or ploughed, the ancient nutrient poor soils are a haven for fungi. Surveys of Welsh uplands reveal its international importance for many species of grassland fungi and it's known by ecologists as 'Waxcap grassland'.
Scarlet Waxcaps



























Orange Waxcaps























A wander around some impressive landslide debris and then it was time to commence the vigil for sunset and a view across the hillside, over landslide debris (paraglacial), soliflucted boulder lobes and till (periglacial) to the southern outliers of the Black Mountains. By the time the cloud cleared, the sun had already set ... IF the cloud had cleared 20 mins earlier, the foreground would have been awash with the last light of sunset, the retreating cloud sheet would have turned magenta ... on such small margins, sigh.
Blue Hour



















The cloud at least presented an opportunity for a 'blue hour' image and then it was on with the head torch and a journey down to the car. A landscape photographer certainly needs a philosophical outlook on weather and observing/photographing the ecology helps to make a trip worthwhile when the weather doesn't play ball.