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Example radargrams showing patterns qualitatively similar to sheath folds in rock from transects collected on (a) 29 March 2011 (76.4°N, 50.1°W) and (b, c) 29 April 2011 (79.5°N, 51.6°W; and 79.6°N, 50.2°W, respectively). Both transects were collected during the 2011 P3 campaign (Table 1). Magenta arrows point to “eye”-like features. The color of the traced reflections has no physical meaning.
