Norber Erratics
North
0
10
20
30
40
50
0
10
20
30
40
50
60
70
80
90
100
Norber Erratics
South
0
5
10
15
20
25
0
10
20
30
40
50
60
70
80
90
100
Norber Erratics
East
0
5
10
15
20
25
30
35
0
10
20
30
40
50
60
70
80
90
100
Norber Erratics
West
0
5
10
15
20
25
30
35
40
0
10
20
30
40
50
60
70
80
90
100
Simple Frequency Plots, one per direction
GraPL © Causeway Graphical Systems Ltd 2000
www.causeway.co.uk.