|
Unit/ Subunit |
Unit thickness (m) |
Architecture | Lower vesicular crust | Lobe interior | Upper vesicular crust |
Segregation structure |
Flow type | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pahoehoe | Present |
Vesicularity (modal%) |
Type |
Vesicularity (modal%) |
Present |
Vesicularity (modal%) |
Breccia | Viscous flow fabric | |||||||||
Base
|
Top
|
Top
|
Base
|
ff
|
pf
|
vf
|
|||||||||||
| 1 | 3.1 | S | Y | — | Y | 2-10 | m | 1-3 | — | — | N | — | N | N | Y (ah, av, t) | Transitional | |
| 3a, b | 32.9 | S | Y | Y | 15-20 | m | 1-2 | N | y(sv) | Y | N | Y(ah) | — | y (ah, i) | Transitional | ||
| 5b | 10.8 | S | — | Y | Y | 5-10 | v(ah, i) | 1-5 | N | N | N | — | Y(ah) | Y(ah) | Y(ah, i) | Transitional | |
| 6 | 12.4 | S | — | — | y? | 5 | v(ah, av) | 3-10 | Y | 3-10 | y(mv, hvs) | — | — | N | Y(ah, r) | Y(ah, av, i) | Transitional |
| 8a, b | 17.1 | S | N | N | N | m (ah, i) | <1-7 | N | N | Y | Y | Y(ah) | Y(ah, r) | Y(ah, i) | A'a | ||
| 9 | 3.7 | L | — | — | Y | 15-20 | m/v(i) | 3-5 | Y | 10-15 | y(mv) | N | N | N | N | Compound pahoehoe (2 lobes) | |
| 10 | 24.9 | L | — | Y | Y | 10-25 | m/v | 0-15 | Y | 10-25 | y(pv, sv, vc, mv) | N | N | N | N | Compound pahoehoe (10 lobes) | |
| 11b | 11.4 | S | N | N | Y | 15-30 | m | 0-2 | Y | 0-15 | y(vc, mv) | Y | Y | y(ah) | N | Transitional | |
| 12b | 15.2 | L | — | — | Y | 5-15 | m | <1-3 | Y | 10-20 | y(sv, vc, mv) | N | N | N | N | Compound pahoehoe (3 lobes) | |
| 13b | 4.4 | S | Y | Y | Y | 20-25 | m | <2 | Y | 10-20 | y(mv) | N | y | N | N | Simple pahoehoe | |
| 14b | 8.1 | S | — | — | Y | 5 | m/v | 5-15 | Y | 10-15 | N | — | — | Y(ah) | Y(ah) | y(ah, i) | Transitional |
| 15b | 6.7 | L | — | — | Y | 10-15 | m | <1 | Y | 7-10 | — | — | — | N | N | Compound pahoehoe (2 lobes) | |
| 16 | 13.7 | S | Y | — | Y | 10 | m/v | 0.5-5 | Y | 15-25 | — | N | N | N | N | Simple pahoehoe | |
| 17 | 9.4 | S | Y | — | Y | 20-25 | m | 0-2 | Y | 10-20 | y(mv, hvs) | N | N | N | N | Simple pahoehoe | |
| 18b | 14.6 | L | Y | Y | Y | 10-25 | m/v | 0-10 | Y | 20-30 | — | N | N | N | N | Compound pahoehoe (>5 lobes) | |
| 19b, c | 9.0 | S | N | — | N | m | 0-5 | N | N | — | Y | Y(ah) | N | Y(ah) | A'a | ||
| 20 | 11.7 | S | — | — | Y | 5-15 | m | <1-3 | Y | 15-40 | y(mv, hvs) | — | — | N | N | Simple pahoehoe | |
| 21 | 7.4 | S | — | — | — | m | 2 | Y | 5-20 | y(mv) | — | — | N | N | Simple pahoehoe | ||
| 22 | 4.0 | S | — | — | Y | 3-5 | m | <1 | — | — | N | — | N | Y(ah) | N | N | Transitional |
| 24a, b | 8.1 | S | N | — | N | m | 1-2 | N | N | — | Y | Y(ah) | N | Y(ah) | A'a | ||
| 26a, b | 6.6 | S | N | — | Y | 1-2 | m | <1 | N | 5-15 | N | — | Y | N | N | Y(ah, i) | Transitional |
| 27 | 13.7 | S | — | — | Y | 3-5 | m | <1 | Y | 3-15 | y(mv) | — | N | Y(ah) | Y(ah) | Y(ah, i) | Transitional |
| 28a, b | 7.5 | S | N | — | N | 1 | m | 0-1 | N | 7-25 | N | — | Y | y(ah) | — | Y(ah, i) | Transitional |
| 29a, b, c | 0.6 | S | N | N | N | m/v | 7 | N | N | Y | Y | y(ah) | N | Y(ah) | A'a | ||
| 30a, b | >9.7 | S | — | N | — | — | m | 0-3 | N | N | Y | Not drilled | y(ah) | N | N | A'a? | |
Notes: S = simple flow consisting of a single lobe (flow unit), L = lobed consisting of multiple flow lobes. Y = present as a major component, — = cannot tell from the recovered core, N = not present, y = present as a minor component, m = massive (nonvesicular), v = vesicular, ah = subhorizontal, i = isotropic, av = subvertical (crystal or vesicle fabric), m/v = lava consisting of multiple lobes that have either massive or vesicular interiors. sv = segregation vesicles, mv = megavesicles, hvs = horizontal vesicle sheets (segregation veins), pv = pipe vesicles, vc = vesicle cylinders. ff = flow foliation, pf = crystal fabric (alignment of tabular and lath-shaped plagioclase phenocrysts and groundmass phases), vf = vesicle fabric: ah = aligned horizontal, r = random (isotropic), av = aligned vertical, t = trachytic texture.