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Geology question--rubble at top of mountain?
Posted: Wed Jul 25, 2018 1:49 pm
by Burning Petard
The Tour de France bike race stage today is 'short' just go up three mountains. Helicopter shot on tv just now, during the first climb, showed three people standing at the top of a near-by 'hill' and the top was covered with broken stone. Biggest pieces seemed to be about the size of a basket ball or a milk case but lots of smaller stuff as well. it was on what looked to me to be the top edge of a steep ridge.
What would cause the rock of the mountain to break up at the very top, but not fall down the slope???
snailgate
Geology question--rubble at top of mountain?
Posted: Wed Jul 25, 2018 5:16 pm
by RayThom
Burning Petard wrote:... What would cause the rock of the mountain to break up at the very top, but not fall down the slope???
snailgate
"Ah, yes, yes... snatch this pebble from my hand, grasshopper."
A.) I have no idea.
Re: Geology question--rubble at top of mountain?
Posted: Thu Jul 26, 2018 2:59 am
by MajGenl.Meade
Steroids?
Re: Geology question--rubble at top of mountain?
Posted: Thu Jul 26, 2018 7:39 am
by Gob
The "Clitter"
(Celtic, clegyr, rock), which is the name given to the, collection of boulders and stones, the debris of what was formerly the higher part of the tor, the disintegration of the granite leaving this harder and indissolvable material strewn on the slopes and at the base of the tors in immense quantities. The "clitter" is a pretty general annexe to the "tor", wherever the latter may be found, and in instances these collections of granite blocks are as remarkable as the tors themselves, in some respects more so. At Fur Tor, in the most desolate part of the Moor, a little to the south of Cranmere Pool, we have a wonderful example of a great tor in process of disintegration, and furnishing a very wilderness of shattered and scattered rocks. The "clitters" at Mis Tor, just north of Merivale, in the west; those at Lether Tor, near the Burrator Reservoir, in the south-west (a tor with a wonderfully fine mountain-like contour, and a rock-covered peak and "clitters" that seem literally to support the tor on its east and south sides); and the mass of granite blocks which surrounds Hen Tor, in the south near Lee Moor, and resembles the crater of a volcano, are remarkable examples of this highly characteristic feature of the Dartmoor landscape.
Re: Geology question--rubble at top of mountain?
Posted: Thu Jul 26, 2018 10:15 am
by Burning Petard
Thanks Cob. SG