Table 3. Number of sites within each cluster in all the three horizons tested and the Euclidean distances between clusters.

Horizon O
Cluster No.	No. of sites	Euclidean distances between clusters
		1	2	3	4
1	6	0.000	-	-	-
2	5	0.524	0.000	-	-
3	3	0.470	0.473	0.000	-
4	52	0.751	0.353	0.698	0.000