Appendix A (Table A1). Rock vs. fine soil chemistry from young lava flows on the Island of Hawai`i. Fines are indicated by bolded italics.
Flow age |
Depth |
SiO2 |
Al2O3 |
Fe2O3 |
CaO |
MgO |
Na2O |
K2O |
TiO2 |
MnO |
P2O5 |
Nb |
Soil P enrichment |
yr |
cm |
wt% |
wt% |
wt% |
wt% |
wt% |
wt% |
wt% |
wt% |
wt% |
wt% |
ppm |
% |
500 |
60–90 fines |
37.0 |
13.3 |
10.9 |
6.6 |
5.0 |
1.40 |
0.39 |
1.87 |
0.20 |
0.66 |
18 |
22 |
500 |
60–90 rocks |
49.9 |
13.3 |
12.2 |
9.8 |
7.5 |
2.15 |
0.41 |
2.01 |
0.17 |
0.24 |
8 |
|
500 |
90–130 fines |
40.9 |
13.3 |
11.0 |
7.4 |
5.3 |
1.57 |
0.40 |
1.91 |
0.20 |
0.56 |
17 |
-8 |
500 |
90–130 rocks |
50.7 |
13.6 |
12.3 |
10.0 |
7.5 |
2.09 |
0.41 |
2.03 |
0.17 |
0.25 |
7 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1500 |
0–5 fines |
10.1 |
3.6 |
2.3 |
5.9 |
1.2 |
0.37 |
0.18 |
0.50 |
0.17 |
0.42 |
6 |
600 |
1500 |
Above surface rock |
45.7 |
13.5 |
12.6 |
10.8 |
11.0 |
2.02 |
0.76 |
2.07 |
0.17 |
0.23 |
23 |
|
1500 |
5–15 fines |
13.8 |
5.2 |
3.7 |
6.5 |
2.3 |
0.57 |
0.27 |
0.74 |
0.18 |
0.45 |
9 |
358 |
1500 |
0–10 rock |
45.2 |
13.4 |
13.0 |
10.9 |
11.3 |
1.99 |
0.73 |
2.06 |
0.18 |
0.24 |
22 |
|
1500 |
33–50 fines |
21.0 |
7.8 |
6.2 |
7.5 |
3.7 |
0.85 |
0.40 |
1.11 |
0.20 |
0.55 |
14 |
312 |
1500 |
33–50 rock |
45.1 |
13.1 |
12.9 |
10.6 |
11.0 |
2.09 |
0.78 |
2.05 |
0.17 |
0.21 |
22 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3000 |
0–10 soil |
28.3 |
6.1 |
4.2 |
2.7 |
1.5 |
0.39 |
0.38 |
0.87 |
0.15 |
0.46 |
9 |
350 |
3000 |
surface rocks |
43.6 |
15.8 |
14.4 |
10.9 |
7.1 |
2.14 |
0.50 |
2.47 |
0.20 |
0.25 |
22 |
|
3000 |
16–22 fines |
34.1 |
16.1 |
14.2 |
7.4 |
5.1 |
1.34 |
0.41 |
2.57 |
0.24 |
0.42 |
24 |
55 |
3000 |
16–22 rocks |
43.2 |
15.7 |
14.9 |
10.6 |
7.1 |
2.08 |
0.44 |
2.59 |
0.20 |
0.26 |
23 |
|
3000 |
22–40 fines |
33.0 |
16.8 |
14.4 |
6.9 |
5.0 |
1.26 |
0.34 |
2.68 |
0.21 |
0.41 |
24 |
40 |
3000 |
22–40 rocks |
42.2 |
15.8 |
14.7 |
10.3 |
7.1 |
1.96 |
0.35 |
2.57 |
0.20 |
0.28 |
23 |
|
3000 |
40–55 fines |
31.3 |
17.0 |
15.1 |
6.8 |
5.7 |
0.98 |
0.23 |
2.77 |
0.18 |
0.35 |
25 |
18 |
3000 |
40–55 rocks |
42.7 |
15.7 |
14.9 |
10.3 |
7.0 |
2.03 |
0.42 |
2.59 |
0.19 |
0.26 |
22 |
|