Torridonian

[ˌtɒrɪ'dəʊnɪən]
adjective Geology of or denoting the later stage of the Proterozoic aeon in NW Scotland, from about 1,100 to 600 million years ago.
Origin
C19: from Loch Torridon, in NW Scotland, + -ian.

English new terms dictionary. 2014.

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