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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-14 02:40:01 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.4883 Longitude: 155.8812 Position from underway logging |
| Sample number: | in2019_v04_D13_006 |
| Dredge: | D13 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 2 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-light | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] | altered |
| Phenocryst abundance (%): | >1 |
| Groundmass: | glassy | microcrystaline | altered |
| Vesicle abundance: | <10% |
| Vesicle Filling (%): | 80 |
| Vesicle fill: | iron oxides, Mn oxides |
| Alteration: | altered |
| Sample bagged: | yes |
| Bucket number: | 26 |
| Rock name: | Altered olivine-feldspar phyric basalt |
| Comments: | Basalt altered with iron oxides and dark grey Mn oxides. Patchy dominated alteration that look like light green to white phyllosilicates or zeolites. Feldspar in groundmass variabley altered. Thin calcite crust (<1mm). |