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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-11 02:52:23 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -20.7156 Longitude: 155.9889 Position from underway logging |
| Sample number: | in2019_v04_D06_005 |
| Dredge: | D06 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 5 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-light | red | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | olivine[iddingsite] | glass[fresh] |
| Phenocryst abundance (%): | 40 |
| Phenocryst size range (mm): | 3-30 |
| Groundmass: | altered |
| Features: | volcanic brecciated |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | 25 |
| Vesicle fill: | calcite |
| Alteration: | Fresh | Mn crust |
| Grain size: | pebble (2-64 mm) |
| Grain shape: | angular |
| Sorting: | poor |
| Components: | crystals | scoria | carbonate/shell |
| Cement: | calcite |
| Sample bagged: | yes |
| Bucket number: | 13 |
| Rock name: | clast supported olivine basalt breccia |
| Comments: | Mn crust 1-5 mm, volcanic inclusions indicate visible mineralogy. Alteration is present throughout the sample. Carbonate fragments ranging from 2-20 mm. Sample is surrounded by a thick manganese crust. |