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The Soldado Rock Type Section of Eocene

Carlotta Joaquina Maury
The Journal of Geology
Vol. 37, No. 2 (Feb. - Mar., 1929), pp. 177-181
Stable URL: http://www.jstor.org/stable/30056454
Page Count: 5
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The Soldado Rock Type Section of Eocene
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Abstract

The Soldado Rock section is a valuable stratigraphic key to basal and Upper Eocene of Northern South America. Of the six beds Nos. 2, 6, and 8 are fossiliferous. No. 2 was placed in basal Eocene (Maury, 1912) and correlated with Alabama Midway beds and Marina Farinha beds of Pernambuco. Later thought by Vaughan to be Wilcox, but basal Eocene age corroborated by discovery of same fauna in Marac quarry (Waring, 1926) where it was associated with characteristic basal Eocene species. Age of No. 2 Bed is equivalent to European Montian and Thanetian of England; Bed No. 6, fora-miniferal fauna, referred by Maury and Bagg to Eocene; later by Douvillé to Oligocene, and by Tobler and Kugler to Upper Eocene. Douvillé later accepted this. Consensus of opinion of foraminiferal experts now is that Bed No. 6 is Bartonian. This permits Bed 8 to be uppermost Eocene, namely Ludian. Bed No. 8 referred by Maury to Wilcox, raised by Douvillé, Tobler, and Kugler into Oligocene, now restored to Eocene, but in uppermost member, Ludian. Bed No. 2 is the Soldado formation of Maury, 1925, and is first basal Eocene ever found in entire Antillean and Northern South American areas. Liddle's application of this name to Upper Eocene, 1928, is invalid. A new formational name (Boca de Serpiente) is now proposed for Bed No. 8 and its continuation westward in the Maracaibo basin of Venezuela.

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