Table 4. Mn and Fe areal density, radiometric age, and apparent accumulation rates.
Mn and Fe areal density, radiometric age, and apparent Mn and Fe accumulation rates on the different flow units of the Aberdeen lava flows of the Big Pine volcanic field, the Red Hill and Little Lake lava flows, and the 16-ka flood-scoured surface of the Red Hill flow at Fossil Falls.
| Flow unit | Age | N | DMn | DFe | Mn accumulation rate | Fe accumulation rate | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg. | S.D. | CV | Avg. | S.D. | CV | Avg. | S.E. | Avg. | S.E. | |||
| [ka] | [μg cm-2] | [μg cm-2] | [μg cm-2 ka-1] | [μg cm-2 ka-1] | ||||||||
| CLS-03 | 40 | 15 | 310 | 130 | 42% | 260 | 170 | 66% | 7.7 | 0.9 | 6.6 | 1.2 |
| CLS-04 | 17 | 11 | 350 | 170 | 48% | 190 | 160 | 87% | 20.6 | 2.7 | 11.0 | 2.6 |
| CLS-05 | 17 | 18 | 250 | 150 | 62% | 93 | 59 | 63% | 14.6 | 2.4 | 5.5 | 0.9 |
| CLS-06 | 27 | 6 | 350 | 130 | 37% | 190 | 103 | 55% | 13.1 | 1.3 | 7.0 | 1.0 |
| Average | 47% | 68% | ||||||||||
| Red Hill, scoured | 16 | 15 | 340 | 200 | 60% | 150 | 200 | 136% | 20.9 | 3.4 | 9.1 | 3.3 |
| Red Hill flow | 60 | 58 | 560 | 310 | 56% | 620 | 230 | 37% | 9.3 | 1.4 | 10.4 | 1.0 |
| Little Lake flow | 140 | 26 | 750 | 180 | 24% | 890 | 240 | 27% | 5.4 | 0.3 | 6.4 | 0.5 |