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| Autor principal: | |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
1988
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| Materias: | |
| Acceso en línea: | https://doi.org/10.1594/PANGAEA.758749 |
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- Petrographic and petrochemical study of igneous rocks from the Sierra Leone Rise indicate that trachytes, trachyandesites, trachybasalts, and tuffs derived from them occur there. K-Ar age of these rocks is 36-43 million years. Alkalic igneous activity is associated with activity of hot spots.