[DOC] [TLE] Volcanic Minerals - Volcano World [PAR] Aluminum ore, called bauxite, is most commonly formed in deeply weathered 
rocks. .... copper, nickel, palladium, zinc, and titanium to increase its tensile 
strength. ... of magma called kimberlite and erupted at a rare type of volcanic vent 
called a .... to Glass Buttes, Oregon, I thought obsidian was pretty much just black 
glass. [DOC] [TLE] Obsidian [PAR] The ancient volcanic hills called Glass Buttes hold a dazzling variety of gem-
quality ... Some obsidian is erupted as lava flows at the ground surface. ... The 
high viscosity of the molten obsidian prevents effective mixing of these magmas, 
... The "snowflakes" in snowflake obsidian are quartz crystals that have formed 
through... [DOC] [TLE] Volcanoes: The Nature of Volcanoes [PAR] Oct 12, 1999 ... Volcanoes are mountains but they are very different from other mountains; they ... 
If so, an eruption begins, and the molten rock may pour from the vent as ... vents 
is known as magma, but after it erupts from a volcano it is called lava. ... The 
diagram below shows that heat concentrated in the Earth's upper... [DOC] [TLE] Io (moon) - Wikipedia [PAR] Io is the innermost of the four Galilean moons of the planet Jupiter. It is the fourth-
largest moon, has the highest density of all the moons, and has the least amount 
of relative water of any known object in the Solar System. It was discovered in 
1610 and was named after the mythological character Io ... Its volcanic plumes 
and lava flows produce large surface changes and paint... [DOC] [TLE] Rocks and Minerals Dictionary: H - EnchantedLearning.com [PAR] The mineral halite, formed of NaCl, is a colorless to gray to brown crystal. ... Heat 
treatment is the heating of stones to a high temperature in order to enhance the ... 
(not natural) green glass that is made from "rock dust" (not volcanic ash) taken 
from ... Howlite was named for its discoverer, Henry How, a Nova Scotia geologist
. [DOC] [TLE] Rocks and Minerals of Pennsylvania - Pennsylvania Department of ... [PAR] Mar 13, 1994 ... The common types of rock that formed in Pennsylvania ... If you look closely at 
halite through a magnifying glass, you will see that most ..... high-school student 
at the time. ... town, Northampton County, and was named for its discoverer, 
Margaret .... At one extreme are rocks that form from volcanic eruptions. [DOC] [TLE] Knowledge Center - Stone Types - Dakota Stones [PAR] Metaphysically, African Turquoise is called a 'Stone of Evolution' because it 
brings ... It's an opaque stone often found with white, yellow, or gray inclusions 
and a silky ... Goldstone is a glass with flecks of copper suspended in it. ... Heat 
treated to darken the material. ... It is formed in the latest stages of volcanic 
eruptions. [DOC] [TLE] Impact melt page: Impact melt rocks, impact glasses, and congeners ... [PAR] With regard to the impact cratering process, a formation of pure melt rock bodies 
... to the IUGS definition are impact melt rocks (the so-called Ries glass bombs). 
... From the very high dislocation velocities and extremely high pressures rocks 
..... A tachylite is a black volcanic glass formed by the chilling of basaltic magmas. [DOC] [TLE] Okeanos Explorer | Expeditions | NOAA Ship Okeanos Explorer ... [PAR] May 2, 2016 ... Actively venting hydrothermal vent chimney shrouded in black smoke ... seafloor 
spreading is occurring and volcanic eruptions provide the heat to ... Okeanos 
Explorer and the Deep Discoverer remotely operated vehicle (ROV). ... shiny 
because it is covered with volcanic glass which forms when the lava... [DOC] [TLE] Nemesis, Proposed Companion Star to the Sun and Mass ... [PAR] THE THEORIZED COMPANION STAR, THROUGH ITS GRAVITATIONAL PULL, 
.... Raup and Sepkoski discovered that mass extinctions occur periodically, ... 
show cracks and strains, is formed in the heat and pressure of a powerful 
explosion. ... volcanoes, prominent in Hawaii, will cough up spherule-shaped 
glass, called... [DOC] [TLE] Rocks/Rocky objects/Astronomy - Wikiversity [PAR]

Question: This black glass named for its discoverer is formed by the high heat of a volcanic eruption
Answer: Obsidian