Websites:
http://www.oilhistory.com/contents/Diamond_Drill/Uses/uses.html
History of the oil industry and use of diamond drill.
http://www.orbitdrilling.com/Rotary_Drilling___Mud.html
Information about rotary drilling.
http://ncnc.essortment.com/oildrillingmet_rufl.htm
Site describes various methods of drilling.
http://www.uwrf.edu/~iw00/trigad.html
Includes nice graphics to explain apparent dip.
http://geoindia.8m.com/struct/
Overall information about apparent dip. Includes a dip
calculator.
http://www.telusplanet.net/public/nstuart/basic.htm
Detailed information about apparent dip.
http://geology.asu.edu/~reynolds/apparent_dip/apparent_dip_home.htm
Gallery of apparent dips. Includes quicktime movies.
