Another out of many theories1 is that the hard beds of quartzite are denuded by the disintegration of the softer layers.
For furnace linings, the quartzite or ganister must be exceptionally pure.
The rock (quartzite) is broken into screes and heavy shingle in many places.
The magnetic iron ore is associated with hornblende and quartzite.
Ben Akbar was old too, but even if he'd been welcome in quartzite, he wouldn't have been happy there.
For them flint and quartzite took the place of bronze, iron, or steel.
Most of these summits are of quartzite, with short heavy screes, white and extremely barren.
It appears to us from its use to have been either a quartzite or a fissile limestone.
This hill, composed of quartzite, is less symmetrical than those shown in Figs. 28 and 29.
Sandstone is changed into quartzite, the sand grains being melted so as to become no longer visible to the naked eye.