Genesis of active sand-filled polygons in lower and central Beacon Valley, Antarctica

• Published in: Permafrost and Periglacial Processes
• Main Authors: Bockheim, James G., Kurz, Mark D., Soule, S. Adam, Burke, Andrea
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2009
• Subjects: sand-wedge polygons; patterned ground; nonsorted polygons; thermal-contraction fissures; McMurdo dry valleys; permafrost; Beacon Valley; Breaker; McMurdo Dry Valleys; Antarc*; Antarctica; Ice; Permafrost and Periglacial Processes; wedge*
• Online Access: https://research-portal.st-andrews.ac.uk/en/publications/41ecd500-a57f-447f-bbfc-0ae85b40402f; https://doi.org/10.1002/ppp.661; http://onlinelibrary.wiley.com/doi/10.1002/ppp.661/abstract

Nonsorted polygons with sand-filled wedges were investigated in Beacon Valley, Antarctica (77.82°S, 160.67°E) using field observations coupled with 2-m resolution aerial photography. A gasoline-powered concrete breaker was employed to expose the sediments of four polygon centres and six wedges from...