An argillite is a fine-grained sedimentary rock composed predominately of indurated clay particles. Argillites are basically lithified muds and oozes. They contain variable amounts of silt sized particles. The argillites grade into shale when the fissile layering typical of shale is developed. Another name for poorly lithified argillites is mudstone. These rocks, although variable in composition, are typically high in aluminium and silica with variable alkali and alkaline earth cations. The term pelitic or pelite is often applied to these sediments and rocks. Metamorphism of argillites produces slate, phyllite, and pelitic schist. Two types of sedimentary rock: limey shale overlaid by limestone. ... Silt refers to soil or rock particles of a certain very small size range (see grain size). ... Shale Shale is a fine-grained sedimentary rock whose original constituents were clays or muds. ... General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13, 3, p Appearance silvery Atomic mass 26. ... The chemical compound silicon dioxide, also known as silica, is the oxide of silicon, chemical formula SiO2. ... For the battery, see alkaline battery The word alkali can mean:- In chemistry, an alkali is a specific type of base, formed as a carbonate, hydroxide or other ionic salt of an alkali metal or alkali earth metal element. ... This article contains information that has not been verified. ... A cation is an ion with positive charge. ... Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid. ... Metamorphism can be defined as the mineralogical, chemical and crystallographic changes in a solid-state rock, i. ... Slate Slate is a fine-grained, homogeneous, metamorphic rock which was derived from an original sedimentary rock composed of clay or volcanic ash through low grade regional metamorphism. ... Phyllite Phyllite is a type of metamorphic rock primarily composed of quartz, sericite mica, and chlorite; the rock is intermediate in grade between slate and mica schist. ... Categories: Mineral stubs | Metamorphic rocks ...

The Haida carvings of Queen Charlotte Islands along the coast of British Columbia are noteable aboriginal art treasures created from variably colored argillites. Haida Haida Copper Shield The Haida are an indigenous people of the west coast of North America. ... The Queen Charlotte Islands or Haida Gwaii are an archipelago off the north-west coast of British Columbia, Canada, consisting of two main islands: Graham Island in the North, and Moresby Island in the south. ... Motto: Splendor Sine Occasu (Latin: Splendour without diminishment) Official languages English Capital Victoria Largest city Vancouver Lieutenant-Governor Iona Campagnolo Premier Gordon Campbell (BC Liberal) Parliamentary representation  - House seat  - Senate seats 36 6 Area Total  â€¢ Land  â€¢ Water    (% of total)  Ranked 5th 944,735 km² 925,186 km² 19,549 km...

References

• R. V. Dietrich, 2005, Gemrocks: Argillite Accessed Dec. 22, 2005.