The quiz on Monday April 20 will be on Electrical (including Radar) techniques. The format will be definitions and short answer. If you know the following you should do well on the quiz.

• How are natural potentials generated in the Earth
• How does electric current propagate in the Earth.
• Archie's law
• Resistivity: What it is and typical values
• Telluric Currents
• Skin Depth
• Experimental procedures and applcations of the following techniques

  Self Potential

  Magnetotellurics

  IP

  EM

  Radar

• Resistivity Pseudo-sections
• Resistivity arrays
• Layer over a half space resistivity plots (resistivity vs distance).
• Differences between IP measurements and Resistivity measurements
• Examples of electrical techniques in action like: archeology, groundwater contamination, mineral exploration.