fbpx
Wikipedia

Vug

For other uses, see Vug (disambiguation).
This article needs additional citations for verification. Please help improve this article by . Unsourced material may be challenged and removed.
Find sources: "Vug"news · newspapers · books · scholar · JSTOR
(May 2010) ()

A vug, vugh, or vugg (pronounced ) is a small to medium-sized cavity inside rock. It may be formed through a variety of processes. Most commonly, cracks and fissures opened by tectonic activity (folding and faulting) are partially filled by quartz, calcite, and other secondary minerals. Open spaces within ancient collapse breccias are another important source of vugs. Vugs may also form when mineral crystals or fossils inside a rock matrix are later removed through erosion or dissolution processes, leaving behind irregular voids. The inner surfaces of such vugs are often coated with a crystal druse. Fine crystals are often found in vugs where the open space allows the free development of external crystal form. The term vug is not applied to veins and fissures that have become completely filled, but may be applied to any small cavities within such veins. Geodes are a common vug-formed rock, although that term is usually reserved for more rounded crystal-lined cavities in sedimentary rocks and ancient lavas.

This vug in the Cascade Range is partially filled with quartz crystals

The word vug was introduced to the English language by Cornish miners, from the days when Cornwall was a major supplier of tin. The Cornish word was vooga, which meant "cave".

Contents

  • A vug in the limonite matrix is the host for a layer of green botryoids of conichalcite and colorless, translucent rhombs of calcite

  • Vug with rosettes of deep blue azurite on a field of malachite

  • Goosecreekite with heulandite-Ca on quartz

  • Intergrown botryoids of blue-green rosasite inside the curve of a limonite vug

  • Example of open space in a vug allowing the formation of crystallized minerals

  • Apple green pyromorphite cluster on limonite matrix

  • Vug in a limonitic matrix is the host for bi-pyramidal, brownish-red crystals of wulfenite

  • Crystallized groutite scattered about a hollow vug

  • In a vug of limonite are intergrown clusters of rhombohedral calcite with inclusions of fibrous aurichalcite

  • Stellerite, epistilbite, eluorapophyllite in a basaltic vug

  • Nestled in its matrix vug are five golden-yellow crystals of sulfur

  • In an open pocket in a matrix of limonite there is a cluster of deep robin's-egg blue chrysocolla with a covering of drusy quartz

  1. "Vug – definition of vug". The Free Dictionary. Farlex. Retrieved2016-04-17.
  2. Geology Buzz
  3. The history of Cornwall, civil, military, religious, ... (Page 56), Richard Polwhele - 1816
  • The dictionary definition of vug at Wiktionary

Vug
Vug Language Watch Edit For other uses see Vug disambiguation This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Vug news newspapers books scholar JSTOR May 2010 Learn how and when to remove this template message A vug vugh or vugg pronounced v ʌ ɡ 1 is a small to medium sized cavity inside rock It may be formed through a variety of processes Most commonly cracks and fissures opened by tectonic activity folding and faulting are partially filled by quartz calcite and other secondary minerals Open spaces within ancient collapse breccias are another important source of vugs Vugs may also form when mineral crystals or fossils inside a rock matrix are later removed through erosion or dissolution processes leaving behind irregular voids The inner surfaces of such vugs are often coated with a crystal druse Fine crystals are often found in vugs where the open space allows the free development of external crystal form The term vug is not applied to veins and fissures that have become completely filled but may be applied to any small cavities within such veins Geodes are a common vug formed rock although that term is usually reserved for more rounded crystal lined cavities in sedimentary rocks and ancient lavas 2 This vug in the Cascade Range is partially filled with quartz crystals The word vug was introduced to the English language by Cornish miners from the days when Cornwall was a major supplier of tin 3 The Cornish word was vooga which meant cave 3 Contents 1 Images 2 See also 3 References 4 External linksImages Edit A vug in the limonite matrix is the host for a layer of green botryoids of conichalcite and colorless translucent rhombs of calcite Vug with rosettes of deep blue azurite on a field of malachite Goosecreekite with heulandite Ca on quartz Intergrown botryoids of blue green rosasite inside the curve of a limonite vug Example of open space in a vug allowing the formation of crystallized minerals Apple green pyromorphite cluster on limonite matrix Vug in a limonitic matrix is the host for bi pyramidal brownish red crystals of wulfenite Crystallized groutite scattered about a hollow vug In a vug of limonite are intergrown clusters of rhombohedral calcite with inclusions of fibrous aurichalcite Stellerite epistilbite eluorapophyllite in a basaltic vug Nestled in its matrix vug are five golden yellow crystals of sulfur In an open pocket in a matrix of limonite there is a cluster of deep robin s egg blue chrysocolla with a covering of drusy quartzSee also EditVesicular texture Rock microstructure AmygduleReferences Edit Vug definition of vug The Free Dictionary Farlex Retrieved 2016 04 17 Geology Buzz a b The history of Cornwall civil military religious Page 56 Richard Polwhele 1816External links Edit The dictionary definition of vug at Wiktionary Retrieved from https en wikipedia org w index php title Vug amp oldid 1024947303, wikipedia, wiki, book,

books

, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.