Descubrimiento de una erupción volcánica de gran magnitud, del Pleistoceno tardío en Alaska
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Updated: Jul 12, 2026
09:06
Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
Published on: July 3, 2016
Science (New York, N.Y.)
|November 19, 1982
Resumen
Un enorme depósito de tefra dacítica de una erupción de Plinio hace aproximadamente 80.000 años cubre Alaska y Yukon. Esta extendida capa de tefra es un valioso marcador estratigráfico del Pleistoceno tardío.
Área de la Ciencia:
- Geología Geología Geología.
- Volcanología Volcanología.
- Ciencia Cuaternaria La ciencia cuaternaria es la ciencia cuaternaria.
Sus antecedentes:
- Un importante depósito de tefra dacítica está presente a través de Alaska y el oeste del territorio de Yukon.
- La erupción ocurrió hace aproximadamente 80.000 años, durante el Pleistoceno tardío.
Objetivo del estudio:
- Para caracterizar un depósito de tefra extendido.
- Para identificar la fuente y el volumen de la erupción.
- Para establecer la capa de tefra como un marcador estratigráfico.
Principales métodos:
- Análisis geoquímico de muestras de tefra.
- Cartografía estratigráfica y correlación.
- Modelado de plumas volcánicas (inferido).
Principales resultados:
- El depósito de tefra es extenso, cubriendo grandes áreas de Alaska y el oeste de Yukon.
- El volumen de la erupción probablemente excedió los 50 kilómetros cúbicos.
- La fuente de la erupción es probablemente dentro de las montañas Wrangell.
- La capa de tefra es un marcador estratigráfico fiable del Pleistoceno tardío.
Conclusiones:
- El extenso depósito de tefra dacítica proporciona información crucial sobre la actividad volcánica del Pleistoceno tardío.
- Las montañas Wrangell son una región fuente probable para esta erupción significativa.
- Esta capa de tefra sirve como un marcador importante para los estudios estratigráficos regionales.
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