Below this were strata of trachitic breccia and augite; the formation was then seamy to an unknown depth.
"Scientific American Supplement, No. 392, July 7, 1883" by Various
We knew that the place was ugly and sinister, but feldspar and augite didn't give it that look.
"The White Waterfall" by James Francis Dwyer
With the exception of quartz and augite, these names are, however, representatives of different classes of minerals.
"Elements of Agricultural Chemistry" by Thomas Anderson
The augite is usually violet coloured, and shows zonal and hour-glass structures.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3" by Various
Melaphyre is a name given to the very dark varieties of altered augitic lavas, rich in magnetite and chlorite.
"Volcanoes: Past and Present" by Edward Hull
Chlorite arises from biotite, augite and hornblende.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4" by Various
The lava is of an augitic character, and magnetic; it possesses a specific gravity of 2.3636 at 25 deg.
"Etna" by G. F. Rodwell
These are distinguished from augite by containing little or no aluminium.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5" by Various
Many dolerites are porphyritic and carry phenocrysts of olivine, augite and plagioclase felspar (or of one or more of these).
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6" by Various
It has, generally, a flesh-red colour, and contains some specks of augite, but little or no mica.
"Narrative of a Second Expedition to the Shores of the Polar Sea" by John Franklin