The DAGGER (Devonian Anoxia, Geochemistry, Geochronology, and Extinction Research) group is an interdisciplinary, international research team focusing on the systematics of mass extinctions in the Late Devonian.

The DAGGER group is coordinated by faculty at Appalachian State University in the Department of Geological and Environmental Sciences, but consists of geochemists, sedimentologists, paleontologists, and stratigraphers from around the globe.  We are affiliated with

We work primarily in the Central Asian Orogenic Belt (western China and western Mongolia), southeast Asia, central Asia, and in Europe to determine the extent, scope, and cause of Devonian ocean anoxia events, their potential for organic carbon sequestration (natural gas deposits), and the rebound from the mass extinctions associated with these events.

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