Ordnance Survey Benchmarks

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Benchmark at Moscar SK 2305 8759

This is a levelling benchmark placed and used by Ordnance Survey. Its location is SK 2305 8759 at Moscar on the footpath from the A57 towards Stanage. The mark was made in 1961, is of the third order of surveying and is 600mm above ground level. Its datum is Newlyn. Originally the mark and boulder were on the west of the footpath but time and boots have now placed it east of the path.

There are some 500,000 benchmarks on the UK mainland, most no longer in use. They identify the height at a given point. The base line is the tidal measuring station at Newlyn in Cornwall, that is the point where all height measurements are taken from, including the 190 Fundamental Benchmarks which were the first order and therefore the most accurate, set in chambers deep underground on bedrock , these benchmarks are still in use today by the Global Positioning System for calculating the accuracy of the height calculation.

SK 24532 94653 Broomhead Moor Fundemental Benchmark TP0526 Chamber
SK 24532 94653 Broomhead Moor Fundamental Benchmark TP0526 Chamber

 

Bamford Edge

Layers of sediment clearly visible on Bamford Edge
Layers of sediment clearly visible on Bamford Edge

Bamford Edge is often overlooked by both climbers and walkers. I guess that lack of access before CROW in 2000 put it out of peoples mind. There are still restrictions in place and the moor is closed at certain times of year. Outside of those times I would urge people to go and explore one of the Peak District most iconic places. This is the edge that looms above you as you drive along the road from Bamford village to Ladybower. It stands proud, heralding the Dark Peak.

The area is easy to get to from Stanage, Bamford or best of all Heatherdene car park. The route from Heatherdene leads up through a holloway, hundreds of years old which threads its way through an oak woodland even older.

The edge itself is good old Gritstone or Millstone Grit. A sandstone peppered with sharp grains that made it perfect for the Sheffield cutlery industry. The face of the edge shows the continuous build up of sediments brought down in to a delta the outflow of which became the Derwent Valley. Over millions of years the sediments were deposited layer up on layer, then as Britain moved north from the equator and the seas retreated the gritstone was revealed.

Gritstone sits above the coal deposits along with some shales, that pop up now and again around the Peak District. Far down below sits the calcium rich limestone, which is plain to see in the White Peak and is easily visible from Bamford Edge if you look up the Hope Valley. There you will see the giant limestone quarry with half the hillside missing and residing in a thousand patios and pathways across Britain.

Bamford Moor is awash with archaeological interest. Stone circles, cairns, hut circles and more all feature on the moor, if you know what to look for and have the patience. Most is now well hidden in undergrowth but a stone circle towards Stanage is relatively easy to spot, sitting on a slightly elevated earth platform. Near to the circle is the Old Womans Stone, a taller carved piece of gritstone that once stood away from the circle, it now lays on the ground. The cairn field and ancient settlement, thought to be Bronze Age are harder to see and require some detective work and patience.

Lots of historic and archaeological interest stretching from 350 Million years right up to present day and covering Neolithic, Bronze age, Roman and modern day industrial activity can be explored.

It is well worth a visit and can be combined with several superb walks. The views along the valleys and across to the high moorlands of Bleaklow and Kinder are magnificent and eastwards lay the edges of Stanage, Burbage, Frogatt and Curbar.