Trachytes sentence example

trachytes
  • The principal rocks are andesites, but trachytes and basalts are also common.

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  • The rocks are mainly basalts and andesites, together with trachytes and phonolites, and some of the basaltic flows are of enormous extent.

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  • Trachytes, rhyolites, andesites and basalts occur, and a definite order of succession has been made out in several areas; but this order is not the same throughout the chain.

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  • Basic lavas, with andesites, trachytes, tuffs and agglomerates are the most common Scottish rocks of this period.

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  • The trachytes of the Siebengebirge are probably of slightly earlier date.

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  • The two leading types of volcanic areas are the plateaus, in which sheets of porphyrites, basalts and even trachytes were emitted, sometimes with wide discharge of volcanic ashes, and the puys, or isolated vents, or scattered groups of vents, which discharged comparatively a small amount of lava and ashes.

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