Depositional and Diagenetic History of the Middle Ordovician Carbonates of the Shenandoah Valley, Northern Virginia

<p>An examination of the Middle Ordovician carbonates in northwest Virginia has revealed a particularly sensitive record of deposition and subsidence. Two-hundred acetate peels from six measured stratigraphic sections in Shenandoah County, Virginia were examined to interpret the depositional and diagenetic history. Two major lithofacies have been recognized within the New Market Limestone and three have been recognized in the Lincolnshire Formation. These five lithofacies represent an overall transgressive sequence. This transgression was not uniform but paused several times to allow carbonate deposition to reach sea-level. These shoaling events suggest a slowly subsiding basin in this region. The carbonate rocks within the study area have been compared to the sediments of the modern Andros Island, Bahamas to establish a depositional and diagenetic model. The models proposed for the study area are in agreement with models proposed for adjacent areas along strike.</p>

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Ocean & Earth Sciences

Year dc:date.available

1987

Author dc:creator

• Weyenberg, Lynn Ellen

Contributors dc:contributor

• Dennis A. Darby
• Stephen Culver
• Ramesh Venkatakrishnan
• Eugene Rader

• Carbonates
• Stratigraphic
• Ordovician
• Virginia
• Limestone
• Geology

Statement dc:rights

• <p>In Copyright. URI: <a href="http://rightsstatements.org/vocab/InC/1.0/">http://rightsstatements.org/vocab/InC/1.0/</a> This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).</p>

Repository record dc:identifier

https://digitalcommons.odu.edu/oeas_etds/98

OAI identifier oai:identifier

oai:digitalcommons.odu.edu:oeas_etds-1108