noun
definition
A class of fine-grained intermediate igneous rock, of volcanic origin, containing mostly plagioclase feldspar.
Examples of andesite in a Sentence
The lavas and ashes ejected by these volcanoes consist of liparite, dacite, andesite and basalt.
All the volcanic rocks of these islands are submarine stratified tuffs which are penetrated here and there by andesite or diabase dikes.
The most common eruptive rock is andesite.
The rolled crystals of sapphire occur, with garnet and other minerals, in glacial deposits, and have probably been derived from dykes of igneous rocks, like andesite and lamprophyre.
The bulk of the mountain consists of andesite, but porphyry, obsidian, trachyte, basalt, and.
Very extensive layers of melaphyre and andesite, as also of conglomerates and volcanic tuffs, cover the middle portions of the peninsula.
The Carboniferous beds contain numerous sheets and flows of basalt and andesite.
There occur also quartz-porphyry (Sierra Morena, Pyrenees, &c), diorite, porphyrite, diabase (well developed in the north of Andalusia, where it plays a great part in the structure of the Sierra Morena), ophite (Pyrenees, Cadiz), serpentine (forming an enormous mass in the Serrania de Ronda), trachyte, liparite, andesite, basalt.
In Minahassa, at the northern extremity, there is a large area of tuffs and agglomerates consisting chiefly of augite andesite, and in this area there are many recent volcanic cones.