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Diamond Kimberlite Lamproite and Related Rock Localites
Great Lakes Region
2 other sections not shown
Arkansas Unnamed Blank breccia Brookins California Cannon and Mudrey carat diamond carats carats/100 tonnes chromian diopside Colorado consists craton crystal deposits diamond stability field diamond was found diamond was reported diamond weighed diamonds diamonds found diamonds recovered diamonds were found diamonds were recovered diamonds were reported diatreme diatreme facies dikes diopside eclogites emplacement facies kimberlite feet Figure gemstones gold placer gravels Hausel hexoctahedron hypabyssal facies ilmenite indicator minerals Kansas Kelsey Lake Kentucky kimberlite kimberlite dikes kimberlitic indicator Kunz Lake Ellen lamproite lamprophyre Larimer County lherzolites Line district lndiana mantle Meyer mica-peridotite Michigan microdiamonds miles mineralogy minettes Mitchell and Bergman Montana Murfreesburo nearby northern occur octahedron olivine olivine lamproite ophiolite Oregon Parrish and Lavin peridotite personal communication phlogopite pipes placer gold Prairie Creek Proterozoic pyrope garnet region reportedly Riley County serpentine Sinkankas 1959 Sloan small diamonds southwestern U.S. Geological Survey ultramafic Virginia Wisconsin Wyoming xenoliths