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Anorthite from
Ardoukôba Volcano, Tadjourah Region, Djibouti
| Locality type: | Volcano | |
| Classification | ||
|---|---|---|
| Species: | Anorthite | |
| Formula: | Ca(Al2Si2O8) | |
| Habit: | The macrocrysts range in size up to 2 cm. Their textures vary from euhedral to subhedral, and other samples show a subhedral to anhedral texture. All the plagioclase minerals crystallized under a condition of equilibrium and show twinning. They exhibit both Carlsbad and polysynthetic twinning in some samples and only polysynthetic twinning in the major samples. There are also some samples that present plagioclases with twinning and without twinning. Zoning is also present in some samples. We observed that all plagioclases have a glomeroporphyritic texture. Some plagioclases have undergone an embayment of microlithic groundmass and, occasionally, plagioclase crystals and olivine microcrysts. | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Data | ||
| Mineral Data: | Click here to view Anorthite data | |
| Locality Data: | Click here to view Ardoukôba Volcano, Tadjourah Region, Djibouti | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 1613087 | |
| Long-form Identifier: | 1:3:1613087:0 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Anorthite | ||
| 1.8km (1.1 miles) | ⓘAsal Rift, Tadjourah Region, Djibouti | |
| References | ||
