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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-14 12:24:25 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.3887 Longitude: 155.7081 Position from underway logging |
| Sample number: | in2019_v04_D15_007 |
| Dredge: | D15 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 3 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-light | red | green |
| Phenocryst abundance (%): | 20 |
| Phenocryst size range (mm): | 0.5-3 mm |
| Groundmass: | microcrystaline |
| Vesicle abundance: | <10% |
| Vesicle Filling (%): | 100% |
| Vesicle fill: | unknown maybe MnOx |
| Alteration: | Mn crust | altered |
| Sample bagged: | yes |
| Bucket number: | 32 |
| Rock name: | Highly altered grey-green massive volcanic rock with brown veins |
| Comments: | Difficult to discern rock type and minerology. Light grey/greenish groundmass-either felsic or altered mafic rock. Thin ( <0.5 mm) Mn crust. Altered basalt? |