-
Rhobell Fawr is the site of an
ancient volcano that was
active during the
Early Ordovician period in the
Arenig range within the
Snowdonia National Park...
- Gwyn SH932411 52.956°N, 3.591°W
Rhobell Fawr SH786256 52.814°N, 3.802°W
Rhobell Ganol SH785274 52.830°N, 3.804°W
Rhobell-y-big SH782282 52.837°N, 3.809°W...
- 028694089966;-4.200864686754 SH525502] Ma,Sim,Hew,N 551 562
Wales 26 32
Rhobell Fawr 734 309 2,408 1,014 30D 124 52.814231745141;-3.8027070202198 SH786256]...
- a
mountain in
central Snowdonia,
north Wales. It is the
sister peak of
Rhobell Fawr. It lies
north of the A494
between Dolgellau and Llanuwchllyn. Its...
- 8624 (Mynydd y Dref) 450 Ma
Rhobell Fawr 734 2408 52°48′50″N 3°48′07″W / 52.814°N 3.802°W / 52.814; -3.802 (
Rhobell Fawr) -
Snowdon (Yr Wyddfa) 1085...
-
remains of
these volcanoes are
still visible, one
example of
which is
Rhobell Fawr
dating from 510 Ma.
Large quantities of
volcanic lava and ash known...
-
estimated 60
cubic kilometres (14 cu mi) of debris.
Another volcano formed Rhobell Fawr near Dolgellau.
During this period,
great ac****ulations of sand, gravel...
-
remains of
these volcanoes are
still visible, one
example of
which is
Rhobell Fawr
dating from 510 Ma.
Large quantities of
volcanic lava and ash known...
- 5 km thick. The
geology contains the
Harlech Grits Group,
Mawddach Group,
Rhobell Volcanic Group and Aran
Volcanic Group. The area
contains a wide range...
- the north, Foel y
Geifr to the east, Erw y Ddafad-ddu to the
south and
Rhobell Fawr and
Cadair Idris to the west. North-east of the
summit is a lake,...
