Figure 1: Location of study area near Edgewater, MD, USA.

Sample locations are represented by their corresponding archaeological time periods. The site labeled “Dock” denotes the location of modern oyster sampling. Map was created in ArcMap version 10.3 and modified in Adobe Illustrator version CC (http://desktop.arcgis.com/en/arcmap/10.3/main/get-started/whats-new-in-arcgis.htm and http://www.adobe.com/products/illustrator.html, respectively).