The presence of summer hoar horizons and changes in density suggests that the 4m pit represents 13 years of accumulation.
Figure 3: Snow profiling at Evans Piedmont Glacier; a) Density and observations used to locate hoar horizons (A), fresh un-compacted snow (D), normal density snow (B) and ice/ hard layers (C); b) Stratigraphy of upper 2m section of the pit.