ఒక ప్రాథమిక లేదా బసాల్ట్ గ్లాస్,

tachylite's Usage Examples:

protolith, saprolitized peridotite, green saprolite (main ore horizon), tachylite (a Fe oxide horizon), black saprolite, yellow and red laterite.

Ultramylonite is often hard, dark, cherty to flinty in appearance and sometimes resemble pseudotachylite and obsidian.

Particles of volcanic glass called tachylite were created as the water turned to steam and explosively fragmented the.

Pseudotachylites can still be encountered here.

Burton) "The tachylite of the Cleveland dyke".

Helenite Hyaloclastite – A volcaniclastic accumulation or breccia and tachylite – volcanic glasses with basaltic composition Knapping Libyan desert glass –.

It is a less common form of tachylite, with which it usually occurs together; however it lacks the iron oxide.

palagonitic substance, but owing to the absence of steam cavities the tachylite selvages of dikes are more often found in a fresh state than the basic lapilli in.

along with the blocky, equant shapes and density of sideromelane and tachylite clastic rock in the field suggest that Sand Mountain Field lava interacted.

form a variety of pyroclasts from irregular sideromelane droplets to blocky tachylite (black to dark brown microcrystalline pyroclasts).

of central and northern Europe: he wrote on gypsum, pyrites, felspar, tachylite, cordierite and on some eruptive rocks, and devoted much attention to.

glassy pseudotachylites.

often exhibit fine grained to aphanitic chilled margins which may contain tachylite (dark mafic glass).