Concept
Alternate Profiles
Different views and formats:
Alternate Profiles ?Profiles (alternative information views) encoded in various Media Types (HTML, text, RDF, JSON etc.) are available for this resource.
- Preferred Labelskos:prefLabel
basalt
- URI
- http://resource.geosciml.org/classifier/cgi/lithology/basalt ↗Go to the persistent identifier link
- Within Vocab
- Simple Lithology
| Preferred Labelskos:prefLabel | basalt |
|---|---|
| Definitionskos:definition | Fine-grained or porphyritic igneous rock with less than 20 percent quartz, and less than 10 percent feldspathoid minerals, in which the ratio of plagioclase to total feldspar is greater 0.65. Typically composed of calcic plagioclase and clinopyroxene; phenocrysts typically include one or more of calcic plagioclase, clinopyroxene, orthopyroxene, and olivine. Includes rocks defined modally in QAPF fields 9 and 10 or chemically in TAS field B as basalt. Basalt and andesite are distinguished chemically based on silica content, with basalt defined to contain less than 52 weight percent silica. If chemical data are not available, the color index is used to distinguish the categories, with basalt defined to contain greater than 35 percent mafic minerals by volume or greater than 40 percent mafic minerals by weight. |
| Exact MatchexactMatch |
http://inspire.ec.europa.eu/codelist/LithologyValue/basalt
|
| Narrowernarrower |
alkali olivine basalt
tholeiitic basalt |
| Broaderbroader |
basic igneous rock
fine grained igneous rock |
| See AlsoseeAlso | Simple Lithology |
| Exampleexample | picrobasalt |
| Is Defined ByisDefinedBy | Simple Lithology |