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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-18 23:20:57 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -14.3969 Longitude: 155.4574 Position from underway logging |
| Sample number: | in2019_v04_D27_002 |
| Dredge: | D27 |
| 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 |
| Composition: | intermediate |
| Phenocryst mineralogy: | feldspar | altered |
| Groundmass: | microcrystaline | altered |
| Vesicle abundance: | absent |
| Alteration: | Mn crust | altered |
| Sample bagged: | yes |
| Bucket number: | 37 |
| Rock name: | Trachyte/Altered basalt |
| Comments: | Mn crust 1-2 mm, altered groundmass with visibly altered feldspar surrounded by thin Mn-crust, white crystals and a vein of white crystal through the rock (doesn't react with HCl, so probably zeolite), amygdales with white crystal. |