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In geology and petrology, a prism is a long, narrow, wedge-shaped sedimentary body with a width to thickness ratio greater than 5 to 1 but less than 50 to 1, and a length 1.5 to 3 times its width.
Additional recommended knowledge
These types of sediments are typically formed during orogenic deformation. For example, the arkoses found in fault troughs.
"Prismatic" is also type of mineral habit (appearance of a crystal). Prismatic minerals have crystals that show a uniform cross-section.
Categories: Sedimentary rocks | Mineral habit
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Prism_(geology)". A list of authors is available in Wikipedia.|