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Event details
| Voyage: | IN2018_V08 [details] |
| When: | 2019-01-02 10:03:55 UTC |
| Log: | Geology_Rocks_in2018_v08 |
| Equipment: | Not specified |
| Position: | Latitude: -37.6495 Longitude: 156.2184 Position from underway logging |
| Sample number: | IN2018_V08_D10_005 |
| Dredge: | 10 |
| Dredge Date: | 02/01/2019 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Sample sawn: | Yes |
| Sawn sample photographed: | Yes |
| Number of photos: | 3 |
| Colour: | black | brown |
| Composition: | mafic |
| Alteration: | Fresh | Mn crust | altered |
| Grain size: | pebble (2-64 mm) |
| Grain shape: | rounded |
| Sorting: | poor |
| Components: | scoria |
| Phenocryst mineralogy: | feldspar | pyroxene |
| Phenocryst abundance (%): | 3 |
| Phenocryst size range (mm): | 1-2 |
| Groundmass: | glassy | microcrystaline |
| Vesicle abundance: | moderate (30-50%) |
| Sample bagged: | yes |
| Sticker: | yes |
| Bucket number: | 026 |
| Rock name: | manganese nodule with pyroxene-feldspar phyric vesicular basalt pebbles |
| Comments: | very thick mn crust - 4cm, alteration rim surrounding lava pebble 0.5cm thick, glassy in parts around vesicles. |