Pennsylvania Eastern Region Abstract Competition. The Wright Center for Graduate Medical Education (Formerly Scranton Temple Residency Program) in Scranton, PA will host the ACP PA Eastern Regional Meeting on October 6, 2012 at The Commonwealth Medical College (TCMC) in Scranton. The competition is open to all residents in the Pennsylvania Eastern Region.
Diamonds are formed as an allotrope of the element carbon, at depths greater than 90 miles. The pressure and heat at this depth is critical to the formation of the diamonds thâ¦at are mined at the surface today. At crustal pressures, the stable form of carbon is the allotrope graphite.
1) Diamond Formation in Earth's Mantle. Geologists believe that the diamonds in all of Earth's commercial diamond deposits were formed in the mantle and delivered to the surface by deep-source volcanic eruptions. These eruptions produce the kimberlite and lamproite pipes that are sought after by diamond prospectors.iamonds have been found in rocks that are thought to have been subducted and then returned to the surface. These types of rocks are very rare and no known commercial diamond deposits have been developed within them. The diamonds found in these types of deposits have been very small and not suitable for commercial use.