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Peridotite (Dunite) Peridotite is a very dense, coarse-grained, olivine-rich, ultra- mafic intrusive rock. It is noted for its low silica content, and contains very little or no feldspar ( orthoclase, plagioclase). It is a common component of oceanic lithosphere, and is derived from the upper mantle.
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South Africa's economy was traditionally rooted in the primary sectors – the result of a wealth of mineral resources and favourable agricultural conditions. ... Since the early 1990s, economic growth has been driven mainly by the tertiary sector – which includes wholesale and retail trade, tourism and communications.
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Hermione and others were concerned about communication at Hogwarts because Hedwig was confronted and injured while delivering a letter from Sirius<span>Nevertheless, Harry managed to retrieve the letter Hedwig was carrying before Professor Grubbly-Plank could take it away.</span>
