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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-28 22:12:34 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.0613 Longitude: 159.2187 Position from underway logging |
| Sample number: | in2019_v04_D48_009 |
| 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 | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | olivine[iddingsite] |
| Phenocryst abundance (%): | 5-7 |
| Phenocryst size range (mm): | 4 |
| Vesicle abundance: | >50% |
| Vesicle Filling (%): | 70 |
| Vesicle fill: | Calcie, clay, zeolite (may have wasted out clays) |
| Sample bagged: | yes |
| Bucket number: | 83 |
| Rock name: | Mn- oxide nodule coating a vesicular, olivine-phyric basalt cobble |
| Comments: | Mn-crust 55 mm, maybe two or more vesicular basalt clasts in this nodule. Olivine-phyric cobble displays vesicles up to 2 mm across that fine towards the edge (marked by fine grained brown basalt), of the clast on the inside of the nodule. All vesicles opherical. |