- https://data.geoscience.earth/ncl
- INSPIRE
- LithologyValue
- _d47443b7-ba10-4da0-92fa-331a12262201
Entry: basalt
URI: http://inspire.ec.europa.eu/codelist/LithologyValue/basalt
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.
Core metadata
| is a | Concept |
| submitted by | Sophie Chaduteau |
| accepted on | 16 Jul 2026 11:53:11.512 |
Download formats available
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All metadata properties
| date accepted |
16 Jul 2026 11:53:11.512
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| date submitted |
16 Jul 2026 09:17:50.627
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| definition |
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| item class |
Concept
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| label |
basalt
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| notation |
d47443b7-ba10-4da0-92fa-331a12262201
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| register |
lithology value
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| status |
status experimental
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| submitter |
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| type |
register item
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| version info |
2
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Definition
| broader |
basic igneous rock
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| 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.
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| narrower |
tholeiitic basalt
| alkali olivine basalt
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| notation |
basalt
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| pref label |
basalt
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| type |
Concept
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