The mountain Labo appears from its bell-shape and the strata exposed in the river bed to consist of trachytic hornblende.
This mountain appears to be formed mainly of trachytic matter.
(b.) Domite is the name applied to the trachytic rocks of the Auvergne district and the Puy de Dme particularly.
Some of the trachytic lavas are said to abound with crystals of albite.
Chimborazo is very likely not a solid mountain: trachytic volcanoes are supposed to be full of cavities.
The enormous eruptions of the trachytic lava cover a continuous area of more than five thousand square miles.
Heilprin says that the mountain is largely composed of trachytic rocks and that it is older than Popocatepetl.
They are of trachytic appearance, containing phenocysts of sanidine, leucite, augite and biotite.
The building material was trachytic rock as found upon the mesa.
They are laccolites of trachytic rock, and raised the Tertiary beds above them in the form of blisters.