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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-19 12:57:55 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -14.4312 Longitude: 155.8026 Position from underway logging |
| Sample number: | in2019_v04_D29_006 |
| Dredge: | D29 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 7 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | white | red | brown | yellow |
| Composition: | mafic |
| Groundmass: | microcrystaline | altered |
| Features: | hyaloclastite |
| Vesicle abundance: | 30-50% |
| Vesicle Filling (%): | 50 |
| Vesicle fill: | calcite, clay |
| Alteration: | Mn crust | altered |
| Grain size: | sand (<2 mm) | pebble (2-64 mm) | cobble (>64 mm) |
| Grain shape: | mixture |
| Sorting: | poor |
| Components: | volcanic vesicular |
| Cement: | calcite | ooze |
| Sample bagged: | yes |
| Bucket number: | 39, 40 |
| Rock name: | Variably altered vesicular monomictic basalt hyaloclastite |
| Requested: | UK |
| Comments: | Pink alteration - cracks and holes had mud inside prior to cutting - very thick Mn oxide crust where inner portions are very dense - some clasts have a grey colour and may be relatively fresh |