The Fenambosy Chevron is one of four chevron-shaped land features on the southwest coast of Madagascar, near the tip of Madagascar, high and inland. Chevrons such as Fenambosy have been hypothesized as providing evidence of "megatsunamis" caused by comets or asteroids crashing into Earth,Scheffers, A., Kelletat, D., Scheffers, S. R., Abbott, D. H., and Bryant, E. A., 2008, Chevrons – enigmatic sedimentary coastal features, Zeitschrift für Geomorphologie, v. 52, no. 3, pp. 375-402. although has been challenged by other geologists and oceanographers.Bourgeois, J. and Weiss, R., 2009, "Chevrons" are not mega-tsunami deposits--A sedimentologic assessment, Geology, v. 37, pp. 403–406.Pinter, N., and Ishman, S. E., 2008, Impacts, mega-tsunami, and other extraordinary claims, GSA Today. v. 18, no. 1, pp. 37–38.
The Burckle crater about east-southeast of the Madagascar chevrons is hypothesized to be an asteroid impact crater that caused the megatsunami about 4,500 to 5,000 years ago.
References
External links Blakeslee, S., 2006, Ancient Crash, Epic Wave, The New York Times, November 14, 2006, last accessed September 28, 2014.