2006 Philadelphia Annual Meeting (2225 October 2006)
Paper No. 26-7
Presentation Time: 8:00 AM-12:00 PM


MAHABIR, Krishna1, KHANDAKER, Nazrul I.2, SCHLEIFER, Stanley2, KOWAL, Jacob A.3, and CUSH, Athar-Rahman2, (1) Earth Science, Grover Cleveland High School, 2127 Himrod Street, Ridgewood, NY 11385, Kmahabir@yahoo.com, (2) Natural Sciences Department, York College of CUNY, 94-20 Guy R. Brewer Blvd, Jamaica, NY 11451, (3) State University of New York at Albany, 59-56 61st Street, Maspeth, NY 11378

Petrographic and geochemical studies have been conducted on selected samples from the Lower Scotland Formation (Eocene) of northeastern Barbados, in order to interpret the depositional environment and the tectonic history of the source area. The Lower Scotland Formation is, for the most part, a fine-grained clastic-dominated sequence with occasional thin intercalations of gypsum, ironstone, and kaolinite. Distinctive deep-water-facies have been well-documented in dark gray shale units containing load cast, flutes, grooves and prods. In addition, turbiditic brown sandstone with a sharp erosive base and pelagic caps also characterize the base of the formation. Notable marine faunas include Nummulites, Orbitoids, and occasionally Discocyclina sp. The Lower Scotland Formation has been intensely folded and faulted and, in many places, shows a thrust contact with the Upper Scotland Formation. Petrological studies involved both light and heavy mineral separation, as well as thin section studies. Detrital minerals in the formation include quartz (both monocrystalline and polycrystalline), feldspar (mostly altered), zircon, monazite, tourmaline, rutile, kyanite, augite, and lithic fragments of varied source rocks. Bulk chemical and trace element investigation of the selected samples suggests an overall trend of immobile traces increasing up-section. The Northwestern Venezuelan Shield, located to the south of the study area, acted as the primary source of detritus for the Lower Scotland Formation., Extensive deformation of the Lower Scotland Formation, due to the Andean Orogenic event (Cenozoic), is well-documented in the studied area.

2006 Philadelphia Annual Meeting (2225 October 2006)
General Information for this Meeting
Session No. 26--Booth# 105
An Early Involvement of Undergraduates and K712 Students in Geological and Environmental Research (Posters)
Pennsylvania Convention Center: Exhibit Hall C
8:00 AM-12:00 PM, Sunday, 22 October 2006

Geological Society of America Abstracts with Programs, Vol. 38, No. 7, p. 77

© Copyright 2006 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.