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...type of eruption known as plinian, because the first detailed account of such an eruption (Vesuvius in AD 79) was written by Pliny the Younger. The eruption destroyed the cities of Pompeii and Herculaneum, and killed over 3500 people (one of whom was Pliny the Elder). [Vesuvius [Image: Alexandra Svatikova under CC-BY-SA licence]] Vesuvius [Image: Alexandra Svatikova under...

...types of fossils lived at different times in Earth history. The Carboniferous period lasted from approximately 354 to 298 million years ago and most of Fermanagh contains limestones from this period and they are marked in blue on the geological map. The youngest solid rocks found in the county are dark volcanic rocks that were intruded into fractures in the Earth's crust...

...types of climate: cold, temperate, hot-arid and hot-humid that lead to different forms of building (Figure 5). [Described image] Figure 5 Four basic building shapes suited to four distinct kinds of climate: (a) cold, (b) temperate, (c) hot-arid, (d) hot-humid In cold regions the need to conserve heat is very important and leads to trying to minimise the outer surface area...