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Obsidian: Quiz
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More interesting facts on Obsidian

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Question 1: Obsidian is also used for ornamental purposes and as a ________.
QuartzGemstoneDiamondGarnet

Question 2: Yellowstone National Park has a mountainside containing obsidian located between ________ and the Norris Geyser Basin, and deposits can be found in many other western U.S.
Washburn–Langford–Doane ExpeditionGeothermal areas of Yellowstone1959 Yellowstone earthquakeMontana

Question 3: ________ and magnesium typically give the obsidian a dark green to brown to black color.
IronOxygenChromiumZinc

Question 4: ________ were once thought by many to be obsidian produced by lunar volcanic eruptions, though few scientists now adhere to this hypothesis.
TektiteImpact eventChicxulub craterMoldavite

Question 5: In ________ obsidian tools from Chaitén Volcano have been found as far away as in Chan-Chan 400 km north of the volcano and also in sites 400 km south of it.
ArgentinaPhilippinesFranceChile

Question 6: Though obsidian is dark in color similar to mafic rocks such as ________, obsidian's composition is extremely felsic.
BasaltLavaIgneous rockFlood basalt

Question 7: Similar tracing techniques have allowed obsidian to be identified in Greece also as coming from Melos, Nisyros or Yiali, islands in the ________.
Aegean SeaSamos IslandAeginaAegean civilizations

Question 8: Glass Mountain, a large obsidian flow at ________
Medicine Lake VolcanoMount GaribaldiNewberry VolcanoMount Mazama

Question 9: [7] Another example is the archeological recovery at coastal Chumash sites in ________ indicating considerable trade with the distant site of Casa Diablo in the Sierra Mountains.
CaliforniaSan Jose, CaliforniaSacramento, CaliforniaLos Angeles

Question 10: Obsidian is a naturally occurring volcanic ________ formed as an extrusive igneous rock.
GlassMACORCranberry glassBorosilicate glass







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