| 1. Alpine |
| 2. Torridonian |
| 3. Caledonian |
| 4. Hercynian |
A) 2, 4, 1, 3
B) 2, 3, 4, 1
C) 1, 3, 4, 2
D) 4, 3, 2, 1
Correct Answer: B
Solution :
In geology, the term Torridonian is the informal name for the Torridonian Supergroup, a series of Mesoproterozoic to Neoproterozoic are and argillaceous sedimentary rocks, which occur extensively in the Northwest Highlands of Scotlan The Caledonian orogeny was a mountain building era recorded in the northern parts of Ireland Britain, the Scandinavian Mountains, Svalbard, eastern Greenland and parts of north-central Europe The Caledonian orogeny encompasses events that occurred from the Ordovician to Early Devonian, roughly 490-390 million years ago (Ma). It was caused by the closure of the lapetus Ocean when die continents and terranes of Laurentia, Baltica and Avalonia collided. The Variscan or Hercynian orogeny is a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laumssia) and Gondwana to form the super-continent of Pangaea.
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