kimberlite pipe
51Diatreme — The Moses Rock Dike diatreme, Cane Valley, Utah. A diatreme is a breccia filled volcanic pipe that was formed by a gaseous explosion. Diatremes often breach the surface and produce a tuff cone, a filled relatively shallow crater known as a maar,… …
52Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …
53Mir Mine — ( ru. Кимберлитовая алмазная трубка Мир ; English: kimberlite diamond pipe Peace ) is an abandoned open pit diamond mine located in Mirny, Eastern Siberia. The mine is 525 m deep and has a diameter of 1200 m. [ru icon… …
54Music of France — France has a wide variety of indigenous folk music, as well as styles played by immigrants from Africa, Latin America and Asia. In the field of classical music, France has produced a number of legendary composers, while modern pop music has seen… …
55Oudatchnaïa — Oudatchnaïa. Oudatchnaïa (en russe : трубка Удачная, troubka Oudatchnaïa, pouvant être traduit par « gisement chanceux ») est un gisement de diamant situé dans un champ de kimberlite de la république de …
56Colorado — This article is about the U.S. state of Colorado. For the former U.S. territory, see Colorado Territory. For the river, see Colorado River. For the physiographic region, see Colorado Plateau. For other uses, see Colorado (disambiguation). State… …
57Kimberley — /kim beuhr lee/, n. 1. a city in E Cape of Good Hope province, in the central Republic of South Africa: diamond mines. 107,104. 2. Also, Kimberly. a female given name. * * * City (pop., 1996: urban area, 170,432), South Africa. Founded in 1871… …
58diatreme — GLOSSARY OF VOLCANIC TERMS A funnel shaped, pipe like volcanic conduit, usually filled with volcaniclastic debris, emplaced by the explosive energy of gas charged magmas. Diatremes are believed to result from hydrovolcanic fragmentation and… …
59yellow ground — noun Etymology: translation of Afrikaans geelgrond : kimberlite found in the upper portion of a pipe …
