39:45 duration 39 minutes 45 seconds
GEOL 118 Lecture 6.2 | Streams & Rivers
38:46 duration 38 minutes 46 seconds
GEOL118 Lecture 6.1 | Water Resources
GEOL 118 Lecture 6.1 Water Our Most Precious Resource
28:17 duration 28 minutes 17 seconds
GEOL118 Lecture 4.2
GEOL 118 Lecture 4.2 - Types of volcanoes and eruptions.
29:52 duration 29 minutes 52 seconds
GEOL118 Lecture 4.1: Igneous Rocks