Noun:

ट्रेकाइट,

trachytes's Usage Examples:

240,000 BC Quartz trachytes c.

The rocks in which orthoclase (or sanidine) is present in considerable amount are leucite-trachytes, leucite-phonolites.

They have compositions very similar to the trachytes and are usually grouped with them.

The island is formed from an intrusion of trachytes from the lower Carboniferous.

The middle succession holds elongated plagioclase-dominated trachytes.

In many trachytes, however, the phenocrysts are few and small, and the groundmass comparatively coarse.

After the basal trachytes were erupted, the explosive phase produced alkali-feldspar porphyritic trachytes, which erupted as pyroclastic.

consist of lavas that range from basanites and trachybasalts to evolved trachytes and phonolites.

volcanic obsidians, rhyolites, trachytes and phonolites and plutonic quartz syenites where it is associated with amphiboles.

and leucite, are present in trachytes, and rocks of this kind are known as foid-bearing trachytes.

The Monti della Tolfa consists mostly of trachytes formed during the Eocene and the early Pleistocene.

In later years he devoted himself largely to petrology, and published memoirs on the trachytes of Hungary and Transylvania; on a new method of determining the species of feldspars in rocks, depending on fusibility and flame-coloration; on the geology and petrology of the district of Schemnitz; and on Santorin Island.

orthoclase (or sanidine) is present in considerable amount are leucite-trachytes, leucite-phonolites and leucitophvres.