Trip report: North Yorkshire Moors 6th-7th June 2009
The caving group visited Excalibur Pot in the North Yorkshire Moors at the beginning of June. Excalibur Pot was one of the most significant cave discoveries in Britain in 2007. It was found and explored by Gary and Matt, GOC members, and their colleagues in York and Scarborough Caving Clubs (for a description of the discovery, the work they put in, and some excellent pictures, see Descent issue number 202, June/July 2008). The North Yorkshire Moors are a relatively untapped caving area, and Excalibur Pot is the largest cave in the area! We spent some hours squeezing, crawling, and walking around this fascinating and varied cave, glad to be somewhere sheltered after a very wet Friday night on the campsite in Hutton-le-Hole. We eventually reached the main underground streamway where we were glad to be able to walk comfortably down a beautiful passage with abundant calcite decorations.
A small team including Matt and Martin from GOC then split off to explore a promising lead in an area of the cave too restricted for everyone to join in. Their plan was to move or remove a large boulder that was blocking the way ahead, although crawling height passage could be seen beyond. Martin investigated and reckoned that moving a different boulder a little bit would make access possible. A large crow-bar did the necessary job, and the team squeezed through, finding an estimated couple of hundred metres of previously unexplored passage of great significance to the hydrology of the cave. These finds have still to be surveyed but should take the total length of the cave towards a mile, making Excalibur one of the longest UK caves in Jurassic limestone.
On the Sunday we went to look at Bogg Hall Rising – the resurgence from Excalibur Pot and almost certainly other sinks in the area. Entering Bogg Hall Rising is a wet experience. A shuffle down a steep, tight slope drops you into shallow water in a low passage, but a few steps further on the floor slopes steeply down and you find yourself moving through water well above waist height. Negotiating a block sticking out from the wall necessitates a brief dip up to the neck before you climb out of the water for a few feet and then drop back into it. It is at this point that getting properly wet becomes unavoidable. In dry conditions, you climb over a block and then edge forward with water up to your neck in a passage which is barely shoulder height and water-filled to that level, but which obligingly provides a head-sized slot in its roof so that you can breath. In wetter conditions, the size of the airspace diminishes and on this day, after heavy rain earlier in the weekend, the airspace was a matter of inches. As water was likely to be rising rather than falling, we decided that continuing would not be wise. We made an aqueous retreat and waded/swam down the river outside by way of alternative entertainment, before spending several hours in a sunny garden, drinking tea and eating our way through a boulder-pile of rock buns as guests of Richard, the local expert on caves of the area.
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Trip Report: North Wales 18th-19th July 2009
The caving group were in Wales on July 18th and 19th, to visit some mines under the guidance of local expert, Alan. Those of us travelling from Yorkshire were happy to drive away from torrential rain on the Friday to the better conditions in benign North Wales, where it was mildly damp.
Saturday dawned cloudy but dry and by the time we had climbed to the upper entrance to Rhiw Bach mine in Cwm Penmachno we were ready for subterranean coolness. The immense entrance, big enough to admit a modest-sized tank, is barred by gates strong enough to keep one out, but a cunningly-hidden side entrance allows access to flexible objects of human dimensions. Rhiw Bach was a slate mine, and we were shown around stopes – man-made caverns following the best seams of slate – of astonishing size as we descended a series of levels. In one place the marks of shot-holes showed a clear discontinuity at one joint in the strata, indicating that even in the relatively few years since the blasting the strata have shifted. We exited along an adit in which a tramway remains complete with one truck, affording opportunities for free rides as long as other cavers are willing to push, and found ourselves well back down the hill and not far from where our cars were parked.
On Sunday, Alan took us to Parys Mountain Copper Mine on Anglesey. Commencing operations in the bronze age, blossoming in the nineteenth century, and continuing to operate until the 1980s, in its heyday it dominated the world copper market. Even now it is not closed, only mothballed. We saw dynamite still in its wooden box, where it has lain since Victorian times, stone tools used to mine the ore by bronze age workers four thousand years ago, and bits and pieces left by workers in the 1900s. Stalactites and stalagmites have grown in many places, along with great quantities of disgustingly-named “snottite” – slimy threads and curtains created by bacteria that get their energy from the suphide ores in the mine. There are alcoves to better anything the horror movie industry has dreamed up. To add to the air of impending evil, vague whiffs of sulphur come and go, sometimes dispelled by the garlic-odour of arsine gas which comes from arsenic deposits in the mine. Pools of acidic water deeper than you want to know about lie waiting for the unwary passer-by who stands unwisely on a rotting plank.
But with the guidance of someone who understands mines, the horrors are mostly in the mind. We followed largely safe and well-used passages and viewed all these things as might a ghost-train rider in a theme park. When we came out, the sun was shining and we enjoyed a walk round the huge opencast mine before – oh no, dare we mention it? – the traditional GOC Sunday-afternoon cream tea and the long drive home, tired but happy.
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Trip Report: Yorkshire 22nd August 2009
The compromise reached in the car park at the Dalesbridge campsite near Settle on Saturday 22nd may find historical significance for its break with accepted convention. Any properly constructed compromise is founded upon leaving all parties equally dissatisfied. On this occasion, the question was whether an introductory trip should go to Calf Holes or Long Churn. The compromise, reached within minutes, was to do both. It pleased everybody equally.
Calf Holes is a good introduction for the most nervous beginner because everything about it is straightforward. Admittedly, it starts with a climb down a ladder into a stream, but the climb is short and in daylight, and the stream is only just deep enough to come over the tops of your wellies. Will it ever be explained why cavers wear wellies, given that they invariably end up full of water? Never mind. Tradition is all.
You do not splash downstream in Calf Holes for long before you come to a place where the water disappears down through the stones and the way on is along a dry passage. A bit further on you turn into a side passage and find yourself again with the water. If you were entirely witless you could elect to stay with the water down a series of rapids and over a fifteen foot waterfall, but it is generally considered more appropriate to wriggle into a low side passage above the stream and follow that. It leads to an easy climb down and you find yourself back with the stream beyond the waterfall. After few minutes of wading you see daylight, and soon after that you emerge from an entrance maybe half a mile from the one where you entered.
It is not far to drive from there to the parking place near to Alum Pot, into which descends Lower Long Churn cave. We started, though, with Upper Long Churn. It offers the entertainment of a tricky waterfall descent (aided with a rope to cling to) and a delicate step onto a ledge where misjudgement means a ducking in a deep, cold pool. One member of the party, wishing to be in the best position to take photographs, went in there on purpose, but he was wearing a wetsuit and so he did not care. Everyone else managed to stay of out of it. Lower Long Churn, which you may not be surprised to learn is downstream of Upper Long Churn, is perhaps the most popular introduction to caving in Yorkshire. It offers everything – traverses around deep pools, a tight squeeze with a by-pass for those who do not want to try it, a climb in a rift and a free climb, and finally a ladder descent to a wide passage leading to a ledge half way down Alum Pot and thus affording one of the most spectacular views to be found in UK caving. Back almost at the entrance to Lower Long Churn, we elected to leave by the entertaining route, which is a low crawl in the stream. The sun was still shining and only the midges threw a cloud over the proceedings – literal and metaphorical – as we got changed.
I have been to Lower Long Churn cave so many times that I have lost count, but it still delights me every time. Come on you guys. This is an introductory cave. In the immortal words of the governor of California and one-time noted body-builder, “You can do it”. Visit Lower Long Churn with us next time!
Trip Report: Daren Cilau 3rd October 2009
Yes, we were tired and bruised from the caving, but some of us were planning another visit to Daren Cilau even as we drove home.