The Ecological Perspective of Landslides at Soils with High Clay Content in the Middle Bogowonto Watershed, Central Java, Indonesia

Table 4

Selective sample of XRF analysis in weathered materials.

	Weathered material 1			Weathered material 2
	Formula	Z	Concentration	Formula	Z	Concentration
Minerals	SiO2	14	37.89%	SiO2	14	29.53%
	Fe2O3	26	27.87%	Fe2O3	26	28.02%
	Al2O3	13	27.69%	Al2O3	13	22.81%
	TiO2	22	2.49%	Na2O	11	9.98%
	P2O5	15	0.78%	MgO	12	2.54%
	CaO	20	0.68%	TiO2	22	1.91%
	MnO	25	0.62%	CaO	20	1.11%
	SO3	16	0.52%	P2O5	15	0.82%
	Cl	17	0.43%	K2O	19	0.75%
	K2O	19	0.35%	SO3	16	0.70%
	Nd2O3	60	0.17%	Cl	17	0.52%
	SrO	38	0.12%	MnO	25	0.25%
	Pr6O11	59	0.10%	La2O3	57	0.17%
	ZrO2	40	0.06%	CeO2	58	0.15%
	ZnO	30	0.04%	Nd2O3	60	0.13%
	CuO	29	0.04%	ZrO2	40	0.12%
	Cr2O3	24	0.03%	Pr6O11	59	0.07%
	CeO2	58	0.03%	V2O5	23	0.07%
	Ga2O3	31	0.02%	CuO	29	0.05%
	SnO2	50	0.02%
Alkali elements	O	8	46.13	O	8	40.83
	Fe	26	21.08	Fe	26	19.60
	Si	14	16.73	Si	14	13.81
	Al	13	13.35	Al	13	12.07
	Ti	22	0.75	Na	11	7.41
	Ca	20	0.41	Mg	12	1.53
	Mn	25	0.33	Ti	22	1.14
	Cl	17	0.27	Ca	20	0.79
	P	15	0.26	K	19	0.62
	K	19	0.19	Cl	17	0.52
	S	16	0.15	P	15	0.36
	Nd	60	0.14	S	16	0.28
	Sr	38	0.05	Mn	25	0.19
	Pr	59	0.04	La	57	0.15
	Zr	40	0.02	Ce	58	0.12
	Zn	30	0.02	Nd	60	0.11
	Cu	29	0.02	Zr	40	0.09
	Ce	58	0.01	Pr	59	0.06
	Cr	24	0.01	Cu	29	0.04