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.
Aug 29, 2008
Nov 18, 2012
Jan 1, 1955
Jan 19, 1991
Jan 1, 1999
Jan 1, 1971
Nov 30, 2017
Feb 6, 2023
Jan 1, 2016
Jan 13, 2016
Oct 1, 2007
Sep 5, 2023
Oct 12, 2023
Jul 31, 2022
Nov 20, 2023
Sep 20, 2005
Jan 1, 1954
Jan 1, 1951
Jan 1, 1975
Feb 2, 2021
