argillite
Sign in to savethumb|Grey chunks of Graptolite|graptolitic argillite on [[Pakri Peninsula, Estonia; yellowish and white chunks are limestone]] Argillite () is a fine-grained sedimentary rock composed predominantly of indurated clay particles. Argillaceous rocks 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
Key facts
- Rock.name
- Argillite
- Rock.type
- Sedimentary
- Rock.image
- Argillite.JPG
- Rock.image_size
- 300
- Rock.caption
- A piece of black argillite from Haida Gwaii, Canada
- Rock.composition
- indurated clay particles
via Wikipedia infobox
Article
4 sectionsContents
- Belt Supergroup
- "Black slate"
- See also
- References
thumb|Grey chunks of Graptolite|graptolitic argillite on [[Pakri Peninsula, Estonia; yellowish and white chunks are limestone]] Argillite () is a fine-grained sedimentary rock composed predominantly of indurated clay particles. Argillaceous rocks 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.
==Belt Supergroup==