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Stratigraphy, geochemistry and mineralogy of Eocene rocks from the Toa Baja Drillhole
Author(s) -
Smith Alan L.,
Severin K.,
Larue D. K.
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl00399
Subject(s) - geology , subaerial , stratigraphy , pyroclastic rock , geochemistry , island arc , pelagic sediment , volcanic rock , lava , paleontology , volcano , subduction , sedimentary rock , tectonics
The stratigraphy of the Eocene rocks of the Toa BaJa drillhole is dominated by volcaniclastic sediments which are interbedded with marly pelagic limestones, especially in the lower part of the hole, and lava flows. Petrological, geochemical and paleontological evidence suggest that the site of deposition was a deep marine basin and the source of the volcanics were subaerial or shallow submarine island arc volcanoes.