एक गहरे भूरे रंग के ज्वालामुखी चट्टान

andesite's Usage Examples:

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.

- Recent volcanic eruptive rocks (including rhyolite, trachyte, phonolite, andesite and basalt) have been examined at a number of points throughout both the geological regions of the island.

The Carboniferous beds contain numerous sheets and flows of basalt and andesite.

Very extensive layers of melaphyre and andesite, as also of conglomerates and volcanic tuffs, cover the middle portions of the peninsula.

The bulk of the mountain consists of andesite, but porphyry, obsidian, trachyte, basalt, and.

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.

Keechelus andesite series 4000 ft.

The lavas and ashes ejected by these volcanoes consist of liparite, dacite, andesite and basalt.

The most common eruptive rock is andesite.

All the volcanic rocks of these islands are submarine stratified tuffs which are penetrated here and there by andesite or diabase dikes.

andesite's Meaning':

a dark grey volcanic rock