Geography, 24.11.2020 22:10, angelvega2003
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
Answers: 2
Sandstone
19. Obsidian is a type of volcanic glass that is formed when lava cools. Obsidian is