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Provenance and Metamorphic History of the Lay Dam Formation: Alabama Western Blue Ridge

Session: 37th Annual Undergraduate Research Exhibition Sponsored by Sigma Gamma Epsilon (Posters)

Presenting Author:

Claire Dowell

Authors:

Dowell, Claire¹, Chipps, Sydney², McKay, Matthew³

(1) Missouri State University, Springfield, Missouri, USA, (2) Missouri State University, Springfield, Missouri, USA, (3) Missouri State University, Springfield, Missouri, USA,

Abstract:

The Lay Dam Formation of the Talladega Group of eastern Alabama represents a thick (>2 km) metasedimentary suite within the western Blue Ridge province of the Appalachian Mountains. The Silurian to Devonian sedimentary protolith of the Lay Dam Formation represents turbidites and diamictites that filled a basin along the margin of Laurentia. New thermochronology data suggest that complex uplift was underway by the Devonian to the southeast and northwest of the Talladega basin. We present U-Pb zircon and apatite geochronology from the Lay Dam Formation to explore the provenance of clastic sediment into the Talladega basin during the Devonian.  U-Pb apatite results may also provide estimates for metamorphic temperatures and timing of the Lay Dam Formation during peak burial conditions and early exhumation.