Examining Ancient Coastlines and Archeological Features at Tel Akko, Israel: Using 3D ground penetrating radar imaging

Authors: Logan J Bergevin*, University of Wisconsin - Eau Claire, Harry Jol, University of Wisconsin-Eau Claire , Joseph D Beck, University of Wisconsin-Eau Claire , Michal Artzy, Hatter Lab., Leon Recanati Institute for Maritime Studies, University of Haifa , Gloria I López, Centro De Investigación sobre la Evolución Humana
Topics: Geomorphology, Coastal and Marine
Keywords: geomorphology, GPR, coastline, coastal progradation, archaeology
Session Type: Poster
Day: 4/5/2019
Start / End Time: 8:00 AM / 9:40 AM
Room: Lincoln 2, Marriott, Exhibition Level
Presentation File: No File Uploaded

From the Late Bronze Age to the early Hellenistic period, Tel Akko, Israel was a significant ancient anchorage located on the northern portion of the Haifa Bay. Over time, Tel Akko’s coast prograded due to stable sea levels, coastal longshore drift, aeolian deposition on the Zevulun Plain, and sedimentation from the Kishon and Na’aman rivers.
The study presents ground penetrating radar (GPR) surveys results collected at the south and southwest base of Tel Akko, where coastal changes are theorized to have occurred. Three GPR grids were collected using a Sensors and Software pulseEKKO 1000 GPR system and analyzed using EKKO_Project, and Voxler Golden Software. The frequencies used in this study were 225 and 500 MHz, with corresponding step sizes of 0.1m and 0.05m. GPR survey results indicate that in grid A there is “drop-off” within the Kurkar sandstone. Locations southward of the Kurkar drop-off might be viable locations for coastal anchorages. Results from Grid B shows westward downlapping reflections located at a depth of 0.4-0.5m, the downlapping reflections provide evidence of probable coastal progradation. Grid C contains multiple areas of chaotic reflections interpreted as ground disturbances. On the eastern side of Grid C, the profiles show multiple regions of hyperbolic patterns. The hyperbolics when viewed from a plane view form linear features that intersect creating right-angled patterns. These patterns are interpreted as human-made features. Results from the project will be used to aid in guiding drillcore locations, paleoenvironmental reconstruction, and future geoarchaeological excavations.

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