| Unit name | Unit/Subunit | Unit thickness (m) | Eruption unit | Architecture |
Lower vesicular crust |
Lobe interior |
Upper vesicular crust |
Segregation structure |
Viscous flow fabric |
Lava flow type |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pahoehoe | Present | Vesicularity (modal %) | Present | Vesicularity (modal %) | Present | Vesicularity (modal %) | Breccia | ||||||||||||
Base
|
Top
|
Top
|
Base
|
ff
|
pf
|
vf
|
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| Sparsely to moderately olivine-phyric basalt | 1 | 16.4 | I | L (13) | Y | Y | Y | 20-35 | Y | 3-20 | Y | 25-35 | pv, vc, mv | N | N | N | N | Compound pahoehoe | |
| Hyaloclastite olivine-basalt breccia | 2a-2c | 13.8 | I | (L) | (y) | (y) | Y | 10-20 | Flow-foot breccia with two coherent lava intervals consisting of pillowlike lobes | ||||||||||
| Sparsely to highly olivine-phyric basalt | 4 | 39.3 | II | L (>12) | Y | Y | Y | 30-35 | Y | 3-25 | Y | 30-35 | vc | N | N | N | N | Compound pahoehoe | |
| Moderately olivine-plagioclase-Phyric basalt | 5 | 7.1 | III | S | N | — | y | 8 | Y | 5-8 | N | — | Y | Y | N | Y | A'a | ||
| Moderately to highly olivine-phyric basalt | 6 | 21.3 | IV | L (>14) | Y | Y | Y | 30-35 | Y | 3-15 | Y | 25-40 | vc | N | N | N | N | Compound pahoehoe | |
| Aphyric to moderately olivine-phyric basalt | 7 | 17.0 | V | L (7) | — | — | Y | 20-35 | Y | <15 | Y | 25-40 | N | N | N | N | Compound pahoehoe | ||
| Hyaloclastite olivine basalt breccia and moderately olivine-phyric basalt | 8a-8o | 12.7 | V | (L) | (y) | (y) | Y | 3-40 | Flow-foot breccia with seven intervals consisting of pillowlike lobes; lobe vesicularity decreases downcore | ||||||||||
| Aphyric to sparsely olivine-phyric basalt | 10 | 20.7 | VI | L (5) | — | — | Y | 30-35 | Y | 1-15 | Y | 30-35 | vc, hvs | N | N | N | N | Compound pahoehoe | |
| Hyaloclastite basalt breccia and aphyric to sparsely olivine-phyric basalt | 11a-11ae | 34.8 | VI | (L) | (y) | (y) | Y | 3-40 | Flow-foot breccia with 15 intervals consisting of pillowlike lobes; lobe vesicularity decreases downcore | ||||||||||
| Aphyric to sparsely olivine-phyric basalt | 13 | 1.1 | VII | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | Not possible to determine due to poor recovery |
| Hyaloclastite basalt breccia and sparsely olivine-phyric basalt | 14a-14d | 21.3 | VII | (L) | (y) | (y) | Y | 3-20 | Flow-foot breccia with 15 intervals consisting of pillowlike lobes; lobe vesicularity decreases downcore | ||||||||||
| Highly olivine-phyric basalt | 17a, b | 18.5 | VIII | L | N | N | N | Y | <3 | N | Y | Y | Y | N | Y | A'a | |||
| Aphyric basalt | 18b | 3.1 | IX | S | Y | N | Y | 15-25 | Y | 3-30 | Y | 15-25 | vc | Y | N | N | N | Y | Transitional |
| Sparsely olivine-plagioclase-phyric basalt | 21 | 16.5 | X | S | N | N | N | Y | <3 | Y | Y | Y | N | Y | A'a | ||||
Notes: ff = flow foliation, pf = crystal fabric (alignment of tabular and lath-shaped plagioclase phenocrysts and groundmass phases), vf = vesicle fabric. L = lobed consisting of multiple flow lobes (number in parenthesis indicates number of flow lobes), S = simple flow consisting of a single lobe (flow unit), — = cannot tell from the recovered core. Y = present as a major component, y = present as a minor component, N = not present. pv = pipe vesicles, vc = vesicle cylinders, mv = megavesicles, hvs = horizontal vesicle sheets (segregation veins).