# Rocks That Originate Underground

Discusses the physical structure of rocks thrust to the earth's surface from geological cataclysms such as volcanoes and earthquakes.

- Kind: Educational
- Year: 1966
- Runtime: 22 min
- By: Encyclopaedia Britannica Films, inc.
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/RocksThatOriginateUnderground)
- Licence or status: none stated by the archive
- Who can watch: Kids profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/RocksThatOriginateUnderground?play=1)