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.
Sep 20, 2009
Jan 19, 1991
Jan 1, 1975
Apr 28, 2023
Jan 1, 1954
Mar 8, 2005
Apr 18, 2020
Sep 28, 2018
Jan 13, 2016
Oct 1, 2007
Oct 12, 2023
Nov 20, 2023
Sep 5, 2023
Nov 18, 2012
Nov 30, 2017
Jan 1, 1948
Aug 29, 2008
Oct 9, 2010
Jan 1, 1955
Sep 20, 2005
