# How solid is rock?

Produced in cooperation with the American Geological Institute With teacher's guide Summary Establishes a parallel between the constant flux of the atmosphere and hydrosphere and the deformation and movement of the lithosphere. Examines evidence that underground rock can simultaneously break and flow under high pressure and temperature.

- Kind: Educational
- Year: 1968
- Runtime: 21 min
- By: Encyclopaedia Britannica Educational Corporation
- Genres: Education, Industrial and advertising
- Archive: [Internet Archive](https://archive.org/details/howsolidisrock)
- 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/howsolidisrock?play=1)