
Table
T9. Summary of
internal textures of Site 1138 lava-flow units.
Basement
unit |
Pahoehoe
top |
Pahoehoe
base |
Breccia
top |
Breccia
base |
Aa
clasts |
Pahoehoe
slabs |
Pahoehoe
lobes |
Pahoehoe
fragments |
Sediment
fill |
Peperitic
parts |
Jigsaw-fit
clasts |
Welding
in upper breccia |
Welding
in basal breccia |
Spatter
in basal breccia |
Dense
arms in breccia |
Lower
vesicular crust |
Upper
vesicular crust |
Massive
interior |
Entrained
crusts |
Round
vesicles |
Irregular
angular vesicles |
Horizontal
elongate vesicles |
Vertical
elongate vesicles |
Horizontal
vesicle sheet |
Megavesicle |
Mesostasis
blebs |
Oxidized
tops |
3 |
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4 |
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5 |
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6 |
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7 |
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8 |
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9 |
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10 |
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11 |
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12 |
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13 |
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15 |
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16 |
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17 |
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18 |
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19 |
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20 |
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21 |
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22 |
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Note: - = cannot tell from
the recovered rocks; y = identified, but only a minor component; ? = debatable
identification; Y = major component; n = questionable lack of feature; N =
definite lack of feature.
