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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-09-01 22:31:10 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -25.6858 Longitude: 155.4692 Position from underway logging |
| Sample number: | in2019_v04_D48_004 |
| Dredge: | D48 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | yes |
| Number of photos: | 6 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] | pyroxene | altered | other |
| Phenocryst abundance (%): | 20 |
| Phenocryst size range (mm): | 1-2 |
| Groundmass: | microcrystaline |
| Vesicle abundance: | 30-50% |
| Vesicle Filling (%): | 50 |
| Vesicle fill: | Calcite, Clay |
| Sample bagged: | yes |
| Bucket number: | 83 |
| Rock name: | Altered Vesicular Basalt |
| Comments: | Slightly magnetic, Domain alteration, dark grey areas show feldspar but altered, altered pyroxene, eventually olivine (iddingsite) |