Obsidian Pyramid Large - Obsidian is created when volcanic lava coming in contact with water as when lava pours into a lake or ocean is cooled quickly producing a glassy texture in the resulting dark rock.
(Obsidian Pyramid Large - Obsidian; is created; T:when volcanic lava coming in contact with water as when lava pours into a lake or ocean) (volcanic lava; coming; ) (lava; pours; into a lake) (Obsidian Pyramid Large - Obsidian; is cooled; )
Obsidian Pyramid Large - Obsidian volcanic lava lava Obsidian Pyramid Large - Obsidian
is created coming pours is cooled
T:when volcanic lava coming in contact with water as when lava pours into a lake or ocean
into a lake