Chonolith

From Wikipedia, the free encyclopedia
Jump to: navigation, search

A chonolith is an igneous rock intrusion of irregular shape. A chonolith has a demonstrable base, which is absent in other types of irregularly-shaped intrusions (batholiths, stocks and bosses).[1]

Examples are:

  • the Spring Gulch chonolith composed of aplite, in Elko County in Nevada, USA.[2]
  • the Nebo-Babel chonolith of gabbronorite in the West Musgrave area of Western Australia.
  • a chonolith in Norilsk, Russia.
  • a chonolith of dacite of Pleistocene age in Chinkuashih, Taiwan.
  • a chonolith of Cretaceous age in the Cortez Mountains, near Carlin in Nevada, USA.[3]
  • a chonolith of andesite near Shavano in Colorado, USA.[4]

References[edit]

  1. ^ Lahee, F. H. (1961) Field Geology, 6th edition, McGraw-Hill, page 143
  2. ^ Ketner, K. B. et al., (1998) An Outline of Tectonic, Igneous, and Metamorphic Events in the Goshute-Toano Range Between Silver Zone Pass and White Horse Pass, Elko County, Nevada: A History of Superposed Contractional and Extensional Deformation, U.S. Geological Survey Professional Paper 1593, page 10.
  3. ^ Muffler, L. J. P. (1962) Forcible Emplacement of Epizonal Plutons in the Cortez Mountains, North-Central Nevada in Abstracts for 1962, Geological Society of America Special Paper 73, page 208.
  4. ^ Dings, M. G. and Robinson, C. S. (1957) Geology and Ore Deposits of the Garfield Quadrangle, Colorado, U.S. Geological Survey Professional Paper 289, page 24.