Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Giant's Causeway and Causeway Coast' has mentioned 'Volcanic' in the following places:
Occurrence Sentence Text Source
The Giant's Causeway is an area of about 40,000 interlocking basalt columns, the result of an ancient volcanic fissure eruption.
Around 50 to 60 million years ago,[3] during the Paleocene Epoch, Antrim was subject to intense volcanic activity, when highly fluid molten basalt intruded through chalk beds to form an extensive volcanic plateau.
The basalts were originally part of a great volcanic plateau called the Thulean Plateau, which formed during the Paleocene.
[19] In the caption to the plates, French geologist Nicolas Desmarest suggested, for the first time in print, that such structures were volcanic in origin.
Basalt columns are a common volcanic feature, and they occur on many scales, because faster cooling produces smaller columns.