Table 2. Average physical (arithmetical mean ± standard variation) and magnetic properties (geometrical mean ·/÷ standard deviation) for the different flow types, Hole 990A.
| Flow type: | Aa: | Transitional: | Pahoehoe: |
|---|---|---|---|
Number of samples: |
152 |
54 |
49 |
Density (Mg/m3): |
2.91 ± 0.06 |
2.87 ± 0.06 |
2.86 ± 0.07 |
Velocity (km/s): |
5.69 ± 0.35 |
5.36 ± 0.36 |
5.35 ± 0.33 |
NGR (counts): |
8.6 ± 1.1 |
8.1 ± 1.1 |
8.3 ± 1.0 |
Susceptibility (10-5 SI): |
1694 ± 615 |
1269 ± 345 |
1260 ± 350 |
Magnetic intensity (10-3 A/m): |
387 ·/÷ 3.3 |
532 ·/÷ 3.2 |
1346 ·/÷ 2.6 |
Notes: All lava flow types have a density higher than 2.7 Mg/m3. Values in the shaded areas are characteristic for the flow types.