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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-28 23:04:18 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.224 Longitude: 159.1837 Position from underway logging |
| Sample number: | in2019_v04_D48_019 |
| Dredge: | D48 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-light | white | red |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | olivine[iddingsite] |
| Phenocryst abundance (%): | 10-12 |
| Phenocryst size range (mm): | <5 |
| Groundmass: | altered |
| Vesicle abundance: | >50% |
| Vesicle fill: | Clay |
| Grain shape: | mixture |
| Sorting: | poor |
| Components: | volcanic vesicular |
| Sample bagged: | yes |
| Bucket number: | 84 |
| Rock name: | Monomicitic basalt breccia coated with Mn-oxide crust |
| Comments: | Mn-crust 25 mm, cement is light brown to white, but does not react with HCl, soft clays, variably sized clasts within pebble size range, some rounded, some angular poorly sorted, all vesicular basalt clasts, some with scattered, large altered phenocrysts, all vesciles spherical, most filled, with clay or zeolite. |