Composición y origen de los roques centrales de la Caldera de Taburiente (La Palma, Islas Canarias)restos de láminas deslizadas

1. R. Casillas ¹
2. J. De la Nuez ¹
3. C. Fernández ²
4. J.R. Colmenero ³

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More publications in: Geotemas (Madrid)

Abstract

The central “roques” of the Caldera de Taburiente represent erosional remnants of several overlapping sheets slid more than 47,000 years ago from the western, northern and eastern part of the Caldera walls, on which were deposited, filling paleovalleys, conglomerates from aqueous tractive flows ("streamflows"). These alluvial deposits extended to the seashore through Las Angustias paleovalley and formed part of the fan-delta represented by the Tazacorte conglomerates (Unit 5 described by Colmenero et al., 2012). The remains of the slid sheets are tens of meters thick and form massive breccias where a succession of red basaltic pyroclastic beds stacked with basaltic lava flows and crosscut by basaltic dykes is still recognizable. The basaltic flows and dykes present frequent textures in "jigsaw-fit". The structure and composition of slid sheets are similar to those now visible in the Caldera walls in the northern, eastern and western sector, that formed the Taburiente volcano II edifice.

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