About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The mid to upper Vidono shales in northeastern Venezuela contain an abundant foraminiferal fauna. Of the 86 species recorded in this paper, 31 are new to the formation. A characteristic low-oxygen Haplophragmoides-Trochammina-Cyclammina-Glomospira faunule is restricted to the lower black shales of a Vidono outcrop southwest of Puerto la Cruz. The overlying sediments of this section are different and contain benthonic forms indicating that the density stratified waters of a partly restricted basin were overturned by an incursion of the sea.
The benthonic Foraminifera give the Vidono shale its Upper Cretaceous aspect but study of the planktonic species, recognized over wider geographical areas, indicates more precise Paleocene (Landenian) to lower Eocene (Ypresian) age for the mid to upper shales and siltstones of the Vidono formation. Two zones are recognized: a Globorotalia velascoensis-Globorotalia pseudomenardii zone and a younger Globorotalia rex zone. The Upper Cretaceous to lower Eocene planktonic Foraminifera of the Vidono shales offer a more precise means of studying the Cretaceous-Tertiary boundary problems in the Caribbean area.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
|Protected Document: $10|
|Internal PDF Document: $14|
|Open PDF Document: $24|
Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].