Lori Dengler explains DROP COVER HOLD ON and Geology 106 conducts a drill in Founders Hall 118, Cal Poly Humboldt http://www.youtube.com/user/HumboldtOnline?feature=mhum#p/a/u/0/Rs0p3QcSsZE http://www.youtube.com/user/HumboldtOnline?feature=mhum#p/a/u/1/O6jncDk6z3c