| Folk Classification |
Article Index for Folk |
Website Links For Folk |
Information AboutFolk Classification |
| CATEGORIES ABOUT FOLK CLASSIFICATION | |
| sedimentary rocks | |
| petrology | |
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APPLYING FOLK CLASSIFICATION Folk classification consists of one or two prefixes followed by a suffix. Suffixes The suffix ''-sparite'' is used if the rock has a crystalline matrix, and ''-micrite'' if it contains a micritic, or mud-based, matrix. Prefixes The prefix describing the main (non-matrix) component of the rock immediately precedes the suffix, a second prefix describing a second important component may be tagged on to the front of this. Common Prefixes =''oo-'' Used to denote the presence of Ooids =''bio-'' Used to describe biogenetic remnants - for example, shells, echinoiderm Ossicles or other tests =''pel-'' Describes the presence of Peloids (fossilised droppings). May also be used to describe any pellet under 2 mm in diameter (as peloids are often hard to distinguish from intraclasts after Diagenesis ) =''intra-'' Denotes the presence of Intraclasts , for example quartz grains or carbonate clasts eroded from the surrounding rocks. Example A rock consisting mainly of ooids with some shelly fragments, with a crystalline matrix, would be termed a biooosparite. REFERENCES
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