Tags: silicon dioxide
V is for Verde Antique This green beauty gob-smacks our favorite geologist. By Bill Langer Verd-antique, (verd-an-teek) — etym., viridis (vir’-e-dis), green, and antiquus (an-ti’-qwus), ancient (noun) — ‘Serpentine … of a tint resembling that of the green incrustation on ancient coins.’ From ...
O is for obsidian Although a relative youngster in geologic terms, obsidian can change over time from glass to mineral. By Bill Langer Obsidian (ŏb-sĭd’-ē-ən) noun – a usually black or banded, hard volcanic glass formed by rapid cooling of lava that displays ...
SUBSCRIBE & FOLLOW
- VIDEO: Caterpillar builds world’s tallest sand castle, then destroys it 886 Views
- Sand saves a construction worker's life486 Views
- Last second Christmas gift ideas for construction workers262 Views
- Congress passes $1.1 trillion spending bill; cuts billions from federal construction accounts165 Views
- Get operations off to a good start with sound mine planning153 Views