Author Topic: Mossdale-Black Keld  (Read 33232 times)

Offline grahams

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Re: Mossdale-Black Keld
« Reply #125 on: July 16, 2012, 07:38:02 pm »
I've long wondered about the morphology and hydrology of Gasson's Series of Langcliffe Pot. As I understand it, Gasson's is large and contains several inlets and sumps. Does anyone know how these passages were formed and has any water tracing of the inlets been performed? The end of Gasson's Series appears to be about 150 feet below ground. There are no signs in today's landscape (that I know of) of any sinks that could account for such a well developed series of passages. Whilst Gasson's is separated from the surface by impervious layers, is it possible that the original source of water was none other than Mossdale Beck?
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Offline grahams

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Re: Mossdale-Black Keld
« Reply #126 on: July 16, 2012, 07:49:39 pm »
Here's another question that's long bothered me:
The area to the South of Mossdale - Black Keld consists of a huge amount of very thickly bedded limestone. The only resurgences are Davy Keld, Dib Scar, a spring just downstream of Ghaistrill's Strid and Low Mill. None of these is much more than a trickle. So where does all the water go?
Sceptics wanted!

Offline langcliffe

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Re: Mossdale-Black Keld
« Reply #127 on: July 16, 2012, 08:58:08 pm »
Here's another question that's long bothered me:
The area to the South of Mossdale - Black Keld consists of a huge amount of very thickly bedded limestone. The only resurgences are Davy Keld, Dib Scar, a spring just downstream of Ghaistrill's Strid and Low Mill. None of these is much more than a trickle. So where does all the water go?

There's enough water at Low Mill to run a fish farm. The spring downstream of Ghaistrill's is also a reasonable size. We do know that when the Duke's Watercourse broke it's banks in the 1950s and water sank in the valley it emerged at Low Mill.

Offline Joe Parsons

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Re: Mossdale-Black Keld
« Reply #128 on: July 17, 2012, 09:25:13 am »
Quote
Here's another question that's long bothered me:
The area to the South of Mossdale - Black Keld consists of a huge amount of very thickly bedded limestone. The only resurgences are Davy Keld, Dib Scar, a spring just downstream of Ghaistrill's Strid and Low Mill. None of these is much more than a trickle. So where does all the water go?

Which water specifically? Also don't forget the small resurgences of How Beck, and Miles House (which doesn't have an official name, but is located at Mile House Farm) Both of which can flow heavily in wet weather. The Mile House resurgence supplied the water for the house on a permanent basis, until 4 years ago, when the water suddenly stopped! It now only flows in wet weather.

Offline Mike Wood

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Re: Mossdale-Black Keld
« Reply #129 on: July 24, 2012, 06:06:25 pm »
I've long wondered about the morphology and hydrology of Gasson's Series of Langcliffe Pot. As I understand it, Gasson's is large and contains several inlets and sumps. Does anyone know how these passages were formed and has any water tracing of the inlets been performed? The end of Gasson's Series appears to be about 150 feet below ground. There are no signs in today's landscape (that I know of) of any sinks that could account for such a well developed series of passages. Whilst Gasson's is separated from the surface by impervious layers, is it possible that the original source of water was none other than Mossdale Beck?

Seems to me that the water from Swarthgill Hole goes to the New Fearnought Streamway, and probably originally formed the dry passages at least as far as the Agora in Gasson's Series. Don't know if a positive dye-test has ever been accomplished though, so it might be bollocks.

Offline Simon Beck

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Re: Mossdale-Black Keld
« Reply #130 on: September 04, 2012, 10:46:00 pm »
Have pondered the source of new fearnought myself, having visited this region of the cave twice.... Can't say i have much experience of tracing myself so never felt i was in a position to undertake such an experiment, but if in the future any persons with the necessary skills would like to have a go, then i'll be your guide.......si-b

Offline Joe Parsons

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Re: Mossdale-Black Keld
« Reply #131 on: September 05, 2012, 09:13:23 am »
Simon, you might have the answer I am looking for - I am after a survey of Langcliffe. Any thoughts?

Offline Simon Beck

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Re: Mossdale-Black Keld
« Reply #132 on: September 05, 2012, 08:54:29 pm »
I'd have a word with a longtime member of ulsa, or someone influential within the organisation etc, cos the only place you'll find the necessary detail you are after, are the master surveys that were drawn in relation with the original survey of the cave. Maybe copies exist of these, but i don't know, i know a few folk who may beable to help, i will pm you their names if you like, albeit you probably already know them anyway. By the way, the above you probably already knew anyway, but hope it was of some help............si-b

Offline Simon Beck

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Re: Mossdale-Black Keld
« Reply #133 on: September 05, 2012, 09:04:37 pm »
With regards the above predicted source of the new fearnought streamway... I'm only going off a visual memory of the amount of water that descended the streamway and sank in the dementor sump, but the volume is very similar to that sinking at swarthgill hole. 

Offline Joe Parsons

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Re: Mossdale-Black Keld
« Reply #134 on: November 09, 2012, 12:10:50 pm »
Once again I am bumping this back up the list. It would be interesting to learn how many people are currently working on anything in the system at any location.

Offline braveduck

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Re: Mossdale-Black Keld
« Reply #135 on: November 09, 2012, 09:37:50 pm »
A map showing all these risings that have been named would be usefull!

Offline Pitlamp

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Re: Mossdale-Black Keld
« Reply #136 on: November 10, 2012, 08:32:56 am »
Some of them are detailed in the CDG Northern Sump Index 1995, beyond what can reasonably be expected to appear in Northern Caves.

Mind you, if anyone wants to give further info here on those which aren't, it'd really help the production of the new index, which is well underway as I type. As with the previous index we hope to make it of interest to cavers generally, not just us bubble blowers. This can't be done thoroughly without a lot of help - so if anyone wanted to post more info here we'll try to make good use of it in the new index.

Offline braveduck

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Re: Mossdale-Black Keld
« Reply #137 on: November 10, 2012, 01:10:09 pm »
Incidentaly,Low Mill rising which feeds the fish farm,this one I do know where it is.
It now has a green cover over it.Is this so it can not be seen from space (Google Earth) etc.?