Tievebulliagh

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John de Bruijn
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Porcellanite flakes in scree below main outcrop.

Bron, directe link naar afbeelding en meer informatie over Tievebulliagh : http://www.habitas.org.uk/escr/site.asp?item=14


Tievebulliagh is formed from a volcanic plug, the intense heat generated by molten basalt has given rise to the formation of a durable flint, porcellanite, which is found at the foot of the eastern scree slope of the mountain.[2] Three small outcrops of porcellanite can be seen on the higher south-east slope.[1]

Bron:  https://en.wikipedia.org/wiki/Tievebulliagh


Anne Burgess heeft enkele foto's van Tievebulliagh geplaatst.

Tievebulliagh
On the slopes of Tievebulliagh there is an outcrop of a type of rock called porcellanite, which has been baked by the heat of the dolerite plug forming the summit of the mountain. Porcellanite is extremely hard and fine-grained, and it was used in Neolithic times to make stone axes, which have been found all over Ireland and further afield. Fragments of porcellanite can be seen among the dolerite in the scree.
 
Bron, directe link van deze afbeelding en nog meer foto's van Anne Burgess: https://www.geograph.ie/stuff/list.php?title=Tievebulliagh&gridref=D1926
Dit bericht is gewijzigd 4 jaar geleden door John de Bruijn

   
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