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Updated: Jul 12, 2026
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Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
Published on: July 3, 2016
Variaciones vegetacionales y climáticas del Mioceno tardío inferidas de un registro de polen en el noroeste de
Science (New York, N.Y.)
|January 6, 1984
Resumen
El análisis del polen de los depósitos de lagos del Mioceno tardío en Wyoming revela una flora similar a la moderna y climas húmedos / secos alternados. Este registro de alta resolución muestra cambios climáticos similares a los registros marinos de los períodos Terciario y Cuaternario tardíos.
Área de la Ciencia:
- La paleobotánica es la paleobotánica.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- La estratigrafía es la estratigrafía.
Sus antecedentes:
- Los depósitos terciarios terrestres a menudo carecen de una alta resolución temporal para la historia de la vegetación y el clima.
- Los estratos lacustrinos ofrecen potencial para reconstrucciones paleoambientales detalladas.
Objetivo del estudio:
- Para analizar la vegetación y la historia del clima del Mioceno tardío utilizando la estratigrafía del polen.
- Para lograr una mayor resolución temporal de lo que se informó anteriormente de los depósitos terciarios terrestres.
Principales métodos:
- Análisis del polen de los estratos lacustre de la Formación Teewinot en Jackson Hole, Wyoming.
- Análisis estratigráfico de depósitos del Mioceno tardío.
Principales resultados:
- La flora identificada fue esencialmente moderna.
- Seis ensamblajes sucesivos de polen indican condiciones climáticas alternas secas y húmedas.
- La frecuencia del cambio climático es comparable a los registros de isótopos marinos.
Conclusiones:
- La estratigrafía del polen de los depósitos lacustres proporciona información de alta resolución sobre la vegetación y el clima del Mioceno tardío.
- El Mioceno tardío experimentó frecuentes fluctuaciones climáticas, similares a los períodos geológicos posteriores.
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