Why are the continents and oceans where they are and have they always been there? The answers to these questions are provided by the science of plate tectonics, i.e., the movement of the broken pieces of the earth's shell sliding past and bumping into each other. In those shifts, mountains and sea trenches are formed, volcanoes are born, and faults created in the earth. The story of this discovery, as it has evolved from the visionary work of Alfred Wegener and been developed at laboratories of the U.S. Geological Survey, is recounted here in engrossing detail, using sophisticated sound and graphics. Recommended for classroom instruction and general interest. Aud: H, P. (J. Reed)
Secrets in Stone
(1998) 25 min. $50. EarthVision. PPR. Color cover. Vol. 14, Issue 4
Secrets in Stone
Star Ratings
As of March 2022, Video Librarian has changed from a four-star rating system to a five-star one. This change allows our reviewers to have a wider range of critical viewpoints, as well as to synchronize with Google’s rating structure. This change affects all reviews from March 2022 onwards. All reviews from before this period will still retain their original rating. Future film submissions will be considered our new 1-5 star criteria.
Order From Your Favorite Distributor Today: