Sedimentary Rocks

• Carbonatic Rocks
• Evaporite rocks
• Terrigenous Rocks
Grain Size
Terrigenous Rocks
Packing
Roundness
Sorting

• Weathering

Turbidite

• Turbidites

Fossils

• Ammonites
• Bivalves
• Brachiopods
• Gastropods
• Trilobites

Sedimentary Minerals

• Anhydrite
• Baryte
• Chalcedony
• Gypsum
• Glauconite
• Magnesite

Texture

• Allochem
• Carbonatic Matrix
• Dolomitization
• Syntaxial Overgrowthn

Rocks

• Ammonitico Rosso
• Arkosic Sandstones
• Bioclastic Grainstone
• Oolitic Ironstone
• Breccia
• Conglomerate
• Encrinite
• Lithic Arenite
• Mudstone
• Oolite
• Orthoconglomerate
• Radiolarite
• Wackestone

Baryte - BaSO₄

Baryte, or barite, (BaSO₄) is a mineral consisting of barium sulfate. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte and celestine form a solid solution (Ba,Sr)SO₄.

The name baryte is derived from the Greek word "baròs" (heavy). Baryte occurs in a large number of depositional environments, and is deposited through a large number of processes including biogenic, hydrothermal, and evaporation, among others.[1] Baryte commonly occurs in lead-zinc veins in limestones, in hot spring deposits, and with hematite ore. It is often associated with the minerals anglesite and celestine.

This is a thin section of radial growths of Barite (or Heavy Spar). Collected from a mineral vein in the Hope Valley, near Castleton, Derbyshire. Shows "Plumose" (literally like feathers) Structure.

Optical characteristics

• Color: Gray or colorless
• Form: Needlelike crystals, massive crystals or Plumose masses
• Birifrangence: interference colour from low to moderate

Bibliography

• Deer, W.A., Howie, R.A., Zussman, J. (1998) Rock-forming Minerals.
• Optical Mineralogy : The Nonopaque Minerals by Phillips / Griffen
• E. WM. Heinrich (1956): Microscopic Petrografy. Mcgraw-hill book company,inc

Photo

Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)	Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)