Wavelets spectrum of 2.txt (size 125-250 μm). Y-axis periods are
approximate: exact values are 2=30.4; 4=60.8; 8=121.6; 16=243.2; 32=486.4;
64=972.8; 128= 1945.6 years, due to the 15.2 years step (or 0.0152 Kyr) on
X-axis (data digitized at 1-pixel step or 15.2-yr). If we consider the red
section like a human face (with eye), hair wisp corresponds to 0.17 Kyr;
nose to 0.4 Kyr; upper lip to 0.7 Kyr and bottom lip to 1.1 Kyr observed in
the MEM Spectrum.