Table 2. Normalized Mn and Fe areal densities from pXRF measurements on petroglyphs at the study sites [Avg.: Arithmetic average, S.D.: Standard deviation].

Site	N	NMn		NFe
		[%]		[%]
		Avg.	S.D.	Avg.	S.D.
Map Rock	9	9.5	9.2	---	---
Celebration Park	21	32	19	---	---
Legend Rock	22	34	22	81	32
Petroglyph Canyon	10	15	9	48	21