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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-28 22:03:46 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.033 Longitude: 159.2217 Position from underway logging |
| Sample number: | in2019_v04_D48_005 |
| Dredge: | D48 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 6 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | white | brown |
| Composition: | mafic |
| Alteration: | Mn crust |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] |
| Phenocryst abundance (%): | 10 |
| Phenocryst size range (mm): | 1 - 3 |
| Groundmass: | microcrystaline | altered |
| Vesicle abundance: | >50% |
| Vesicle Filling (%): | 50 |
| Vesicle fill: | Calcite, clay |
| Sample bagged: | yes |
| Bucket number: | 83 |
| Rock name: | Altered vesicular olivine-phyric basalt |
| Comments: | Mn-crust 0-8 mm, 0.1 - 2 mm diameter vesicles, carbonate crust as well as Mn crust, mostly olivne (iddingsite) phenocrysts but some plag laths, some irregular shaped vesicles. |