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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-14 12:50:29 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.3824 Longitude: 155.6225 Position from underway logging |
| Sample number: | in2019_v04_D15_006 |
| Dredge: | D15 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-dark | grey-light | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar |
| Phenocryst abundance (%): | 20 |
| Phenocryst size range (mm): | <1 mm |
| Groundmass: | microcrystaline | altered |
| Features: | volcanic brecciated |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | 100% |
| Vesicle fill: | unknown variable vesicle abundance |
| Grain shape: | mixture |
| Sorting: | poor |
| Components: | volcanic vesicular | volcanic non-vesicular |
| Cement: | other carbonate |
| Sample bagged: | yes |
| Bucket number: | 32 |
| Rock name: | Altered poorly-sorted volcanic breccia with carbonate veins |
| Comments: | Similar to IN2019_015_010. Minerology within large clast written overleaf. Variable, patchy alteration. Very poorly sorted, some fragmented clasts. Carbonate material in veins/infills. Black material (MnOx) cross cutting veins. No external Mn alteration. See diagram |