Submarine pyroclastic rocks of the La Palma «Ophiolite» complex

Staudigel, S.; Schmincke, H.-U.

http://hdl.handle.net/10400.3/4917

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Authors

Staudigel, S.

Schmincke, H.-U.

Abstract(s)

The basement of La Palma (Canary Islands) consists of plutonic and hypabyssal intrusive and a submarine series, 2.5 km thick. Pyroclastic rocks increase in thickness upwards in the section and dominate at the top where they are several 100 meters thick. The clastic rocks in the pillow-dominated section are well bedded to cross-bedded hyaloclastites forming layers generally < 2 m thick, and thicker beds (up to 5 m) of coarse breccias which range from incipiently fractured pillows, that came to rest nearly in situ, to coarse, well sorted breccias deposited some distance from their source. Clastic rocks in the upper section are massive to poorly bedded, dominantly lapilli- to sand-sized whit clasts, being generally highly vesicular and larger fragments being reddish oxidized displaying shapes and vesicularity intermediate between pillows and sub-aerial scoria. […].

Description

International Symposium on the Activity of Oceanic Volcanoes. Ponta Delgada, 4-9 August 1980.

Keywords

Petrology La Palma Island (Canaries)

URI

http://hdl.handle.net/10400.3/4917

Citation

STAUDIGEL, S.; SCHMINCKE, H.-U. (1982). Submarine pyroclastic rocks of the La Palma ‘Ophiolite’ complex. "Arquipélago. Série Ciências da Natureza", 3: 75-76.