107 ' » P~ | i -_=1 Cig = 40e 2. - 0.33 km | Q¢c3* 10' = ‘O 5 4 oO. = 10° - oO = 107) _ Z _ 107° ! 10 L. 20 ! 20 L0 km Fic. 3. The *?-*°Py concentration in the sediment surface (0cm depth) related to the distance (in km) from the point of impact. Taken from reference 3