Talk:Mantle plume/to do


 * Expand on the density contrast and why it occurs
 * Why the core-mantle boundary?
 * Relationship in time with extinction events
 * Relationship in time with supercontinent accretion and destruction
 * Clarify the difference between plume and hotspot
 * Find more references for the smaller 'plumes'/'hotspot' volcanism
 * Expand on Columbia FB and Yellowstone connection.