Type 3 fold interference between F2 open folds and tight F1 folds (lower part of the photograph) in Cambrian Sequence of the Selborne Group (Ross Orogen) at Contortion Spur (Byrd Glacier, Antarctica). Dark rocks are Contortion schists whereas whitish rocks are Madison Marble. The height of the southern slope of Mt. Madison is nearly 500 m. Helicopter view. PhotoID182
CAROSI et al (2007) USGS OF-2007-1047, Short Research Paper 030; doi:10.3133/of2007-1047.srp030.
Stump et al (2004) New Zealand Journal of Geology and Geophysics, Vol. 47: 157–171