janiyasuber123 janiyasuber123
  • 24-11-2020
  • Geography
contestada

Sandstone
19. Obsidian is a type of volcanic glass that is formed when lava cools. Obsidian is
a/an
a. intrusive igneous rock
c. sedimentary rock
b. extrusive igneous rock
d. metamorphic rock

Respuesta :

grewalnoordeep grewalnoordeep
  • 24-11-2020

Answer:  b

Explanation: Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock

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