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you forgot the cur.. by maclimber   (Show all posts)
A squillion years .. by Bleck Cra   (Show all posts)
Thanks mccrtchly f.. by slemish   (Show all posts)
mcrtchly
2011-01-18 10:41:57
Irish Volcanoes
Of course there are no active volcanoes in Ireland - yet (but maybe in 50 million years time when Africa collides with Europe or in 150Ma time when the Atlantic Ocean starts to close). However there are the remains of old volcanoes throughout the geological record in Ireland. The youngest are found in NE Ireland and are related to the opening of the Atlantic Ocean about 60Ma ago. Slieve Gullion is the core of a volcano from this time (see: http://www.louthcoco.ie/en/Publications/General/A_Geological_Field_Guide_to_Cooley,_Gullion,_Mourne_Slieve_Croob_.pdf). Slemish in Antrim is the core of another volcano from this period. During the Carboniferous period (350Ma) occasional small volcanoes disturbed the warm tropical seas. The remnants of these can be seen today as several small hills in the Irish Midlands such as Croghan Hill in Offaly. The Lough Guitane (Mangerton) volcanic complex in Kerry is slightly earlier (about 390Ma) but is related to the same tectonic events (the closing of an ocean to the south of Ireland at this time). Going back further in time Ireland was split in two by a precursor to the Atlantic Ocean known as the Iapetus Ocean (SE Ireland was split many 1000'skm from NW Ireland by the ocean). When the Iapetus closed around 450Ma there were many volcanoes in Ireland. An example (now eroded to sea level) can be seen on the Copper Coast in Waterford (see: http://homepage.eircom.net/~ccgeopark/Geology.htm). There are also numerous ancient volcanic cores in Connemara and Mayo.
...I remember one .. by Conor74   (Show all posts)
hbowman, just ask .. by Bleck Cra   (Show all posts)
....well a mystery.. by bryanmccabe   (Show all posts)
Just out of curios.. by hbowman1   (Show all posts)
The Devil’s Coach .. by dhmiriam   (Show all posts)
New Camera; stupid.. by Bleck Cra   (Show all posts)


RECENT CONTRIBUTIONS 1 2 3 .. 25 Next page >>
Track
Sheep's Head Ramble...
Onzy 7 hours ago.
walk, Len: 8.4km, Climb: 237m, Area: Cork Islands (Ireland)

  
Summit Comment
Croghan Hill: In the Steps of Old Croghan Man
ladyhawke1003 9 hours ago.
Croghan Hill is one of the main reasons I came to Ireland. I am researching Old Croghan Man for a book. Even with Mel's precise directions we had a little trouble finding the community centre. It ...

  
Summit Comment
Great Saltee Island: Bird's Glare
simon3 a day ago.
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Track
Near Knockshanahullion, Knockmealdown Mountains (Ireland)
jackill 15 hours ago.
walk, Len: 13.6km, Climb: 518m, Area: Knockshanahullion, Knockmealdown Mountain...

  
Summit Comment
Curra Hill: Cloudy Climb
andreos97 5 days ago.
Fantastic walk, personally feel it's best starting your approach from Glenbeigh village and heading up through the forest as it's quite well signposted. Once leaving the cover of the trees, we wer...

  
Track
Fermoy Scouts night hike
jackill 15 hours ago.
walk, Len: 19.5km, Climb: 928m, Area: Shannon (Ireland)

Summit Comment
Cnoc Lios Uachtair: Connemara in the round
fieldoptic 6 days ago.
An easy to access and navigate hill, well worth it for its central position and views in every direction. Park as previously suggested at L8530 4820 and head north east before swinging north. The ...

  
Track
The Sturrall
Peter Walker a day ago.
walk, Len: 9.1km, Climb: 268m, Area: Donegal Islands (Ireland)

  
Summit Comment
Cnoc Mordáin: Long Connemara Summer Evening
fieldoptic 6 days ago.
Though the road near L88003920 appears unfenced you will encounter a fence very soon after leaving the road. This fence extends along this back road, Bothar na Scrathóg and keeps cattle in typical...

Track
Croaghavehy
Peter Walker a day ago.
As prescribed by Mr Sandman. Parked at the Glengesh viewpoint (where I got to admire some quite astonishing car positi... walk, Len: 3.0km, Climb: 114m, Area: Croaghavehy, Donegal SW (Ireland) Croagh

  
Summit Comment
Ballinacorbeg: Worth a brief visit
Bunsen7 a week ago.
Pleasantly surprised by this, could clearly see Lugnaquilla and Croaghanmoira, as well as numerous other summits, slightly awkward entry into the fields just west of the forest which don't appear ...

  
Forum: General
Object to very high windfarm in Sperrins?
simon3 3 days ago.
Mountaineering Ireland is considering submitting an objection to a revised application for the Doraville Wind Farm in the Sperrins, on the grounds of visual impact and detraction from the walking/...


RECENT CONTRIBUTIONS 1 2 3 .. 25 Next page >>