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Deployment Details
Survey: - SS200302 [details]
Deployment Type: - Sediment Sampling
Station: TD-33
When: 2008-03-25 08:23 UTC
Where: 22° 38.6' S 176° 44.7' E
Maximum Depth (m): unknown
Sediment Sampling details
Device used: Dredge - unspecified
Contents | Top (m) | Base (m) |
---|---|---|
Fresh black aphyric dacite. Well developed thick glass crusts on upper and lower surfaces of pillows. Very sparse plagioclase phenocrysts (1 per 4-5 blocks). Moderately vesicular, but vesicles do not exceed 1 cm in diameter. Conchoidal fractures. | ||
Fresh black aphyric dacite. Consists of thick (>5 cm) crumbly glass encrusting pillows. The lower surfaces of the pillows have an unusual honeycomb (in 3d) texture suggesting possible formation above a hollow lava tube (although unambiguous drips were not present). Interpreted as a separate but young lava flow. | ||
Dark grey to black aphyric dacite. Similar to 33-01, but locally Fe-stained (orange) surfaces and large (2-3 cm) vesicle cavities. Interpreted as an older flow. Also has less glass crust. |