Rocks: Where They Come From
Follows Don as he sees different kinds of rocks at a granite quarry, sandstone cliff and museum. Demonstrates the effects of water, heat and pressure in the formation of rocks.
Follows Don as he sees different kinds of rocks at a granite quarry, sandstone cliff and museum. Demonstrates the effects of water, heat and pressure in the formation of rocks.
2017
2023
1991
1975
2016
2007
2005
1954
2023
1948
2005
2020
2010
2018
1955
2012
2009
2023
2012
1999