Fluoride Variations in Rivers on the Slopes of Mount Meru in Tanzania

Table 5

Particle size distribution for ground igneous rocks.

Diameter	Solomu		Nduruma		Maksoro		Jamera
	Weight (g)	%	Weight (g)	%	Weight (g)	%	Weight (g)	%
≥2 mm	23.9911	17.38	19.5052	14.13	21.7323	15.75	23.5537	17.07
1.5 mm	14.7302	10.67	13.9703	10.12	10.9429	7.93	13.1351	9.52
1 mm	19.339	14.01	19.4628	14.10	17.9295	12.99	17.8441	12.93
0.35 mm	39.5516	28.66	37.0772	26.14	34.4105	24.94	40.1626	29.10
250 µm	5.7149	4.14	9.0026	6.89	9.201	6.67	9.1059	6.60
180 µm	8.9251	6.47	6.0108	4.36	8.5363	6.19	6.5971	4.78
125 µm	14.8566	10.77	15.9047	11.53	10.4439	7.57	17.8368	12.93
90 µm	4.1171	2.98	11.317	8.20	14.6206	10.59	5.0321	3.65
63 µm	3.9996	2.90	4.0081	2.90	7.2159	5.23	3.2776	2.38
45 µm	1.4958	1.08	0.9102	0.66	1.7899	1.30	0.6323	0.46
32 µm	0.5373	0.39	0.6629	0.48	0.6107	0.44	0.4069	0.29
20 µm	0.5885	0.43	0.4715	0.34	0.3875	0.28	0.379	0.27
Total	137.847	99.89	137.803	99.86	137.821	99.87	137.963	99.97

The total weight of the sample was 138.0027 g.