There is an asbestos trial mine located on the summit. A small seam of white asbestos was discovered however insufficient amounts to commercially mine.
Geologyedit
The summit of Moel yr Ogof is composed of a brecciated rhyolite, diagnostic of gravitational collapse in a rhyolite dome.
Surrounding the crown of the mount is a geological unit consisting of alternating bands, of varying thickness, of pillow basalts and a green/grey sandstone that is of mafic origin, potentially derived from the pillow basalt itself.
The pillow basalt is relatively well preserved in places, where devitrification rims clearly outline the individual pillows. It is composed of dark green/black, very fine crystalline, basaltic rock, which has weathered to a dark red/brown colouration due to the presence of iron minerals.
The sandstone member of the unit is a pale green/grey, fine to medium grained, well sorted sandstone. It shows good cross-bedding and rare ripple structures indicating a tidal depositional environment.
There is a large scale syncline running NNE-SSW, that extends straight through the summit of Moel yr Ogof and can be seen clearly, in the mountain's profile, when taking the path up to the Hebog ridge from the South.
Owain Glyndŵr's cave can be found on the cliff at the eastern flank of the mountain. The Beddgelert Forest lies directly to the north east, while Cwm Pennant lies to the west. Good views of the Nantlle ridge to the north are observed.[1]
Referencesedit
^Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN1-85284-304-7.
External linksedit
www.geograph.co.uk : photos of Moel yr Ogof and surrounding area
moel, ogof, summit, snowdonia, subsidiary, summit, moel, hebog, sister, peak, lower, moel, lefn, from, moel, hebog, with, moel, lefn, behind, highest, pointelevation655, prominence118, parent, peakmoel, heboglistinghewitt, nuttall, humpcoordinates53, 0086, 153. Moel yr Ogof is a summit in Snowdonia It is a subsidiary summit of Moel Hebog and a sister peak to the lower Moel Lefn Moel yr OgofMoel yr Ogof from Moel Hebog with Moel Lefn behind Highest pointElevation655 m 2 149 ft Prominence118 m 387 ft Parent peakMoel HebogListingHewitt Nuttall HuMPCoordinates53 00 31 N 4 09 12 W 53 0086 N 4 1534 W 53 0086 4 1534NamingEnglish translationhill of the caveLanguage of nameWelshGeographyLocationSnowdonia Gwynedd WalesParent rangeMoel HebogOS gridSH565469Topo mapOS Landranger 115There is an asbestos trial mine located on the summit A small seam of white asbestos was discovered however insufficient amounts to commercially mine Geology editThe summit of Moel yr Ogof is composed of a brecciated rhyolite diagnostic of gravitational collapse in a rhyolite dome Surrounding the crown of the mount is a geological unit consisting of alternating bands of varying thickness of pillow basalts and a green grey sandstone that is of mafic origin potentially derived from the pillow basalt itself The pillow basalt is relatively well preserved in places where devitrification rims clearly outline the individual pillows It is composed of dark green black very fine crystalline basaltic rock which has weathered to a dark red brown colouration due to the presence of iron minerals The sandstone member of the unit is a pale green grey fine to medium grained well sorted sandstone It shows good cross bedding and rare ripple structures indicating a tidal depositional environment There is a large scale syncline running NNE SSW that extends straight through the summit of Moel yr Ogof and can be seen clearly in the mountain s profile when taking the path up to the Hebog ridge from the South Owain Glyndŵr s cave can be found on the cliff at the eastern flank of the mountain The Beddgelert Forest lies directly to the north east while Cwm Pennant lies to the west Good views of the Nantlle ridge to the north are observed 1 References edit Nuttall John amp Anne 1999 The Mountains of England amp Wales Volume 1 Wales 2nd edition ed Milnthorpe Cumbria Cicerone ISBN 1 85284 304 7 External links editwww geograph co uk photos of Moel yr Ogof and surrounding area nbsp Moel yr Ogof from Moel Hebog nbsp This Gwynedd location article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Moel yr Ogof amp oldid 1120063965, wikipedia, wiki, book, books, library,
