• Much of the volcanic deposits have been either eroded or buried by rivers, glaciers, and human development. (wa.gov)
  • The International Atomic Energy Agency (IAEA) assigns uranium deposits to 15 main categories of deposit types, according to their geological setting and genesis of mineralization, arranged according to their approximate economic significance. (wikipedia.org)
  • They range in types from trickle lava flows to dynamic violent explosions of molten rock, ash, and poisonous gas that blow hundreds of feet into the air. (hubpages.com)
  • Thirdly, volcanic ash , generally meaning the cooled ash, may form a cloud, and settle thickly in nearby locations. (wikipedia.org)
  • Experts provide a graphic illustration of this process and explain the types and textures of rocks such as granite, obsidian, and quartz. (nottingham.ac.uk)
  • This book explains in accessible terms how different areas of science have been combined to reach our current level of knowledge of volcanic systems. (wiley.com)
  • The davidite - brannerite - absite type uranium titanates, and the euxenite - fergusonite - samarskite group are other uranium minerals. (wikipedia.org)
  • It is proposed that the more acidic granitoids are dominantly the products of I-type crustal sources, but certain diorites and the more basic members of zoned plutons have a substantial mantle component. (cambridge.org)