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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-14 03:05:00 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.4898 Longitude: 155.8826 Position from underway logging |
| Sample number: | in2019_v04_D13_016 |
| Dredge: | D13 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-dark | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] | altered |
| Phenocryst abundance (%): | 20 |
| Phenocryst size range (mm): | 1-2 |
| Groundmass: | microcrystaline |
| Vesicle abundance: | <10% |
| Vesicle Filling (%): | 30 |
| Vesicle fill: | Iron rich clay |
| Alteration: | Mn crust | altered |
| Sample bagged: | yes |
| Bucket number: | 28 |
| Rock name: | Altered olivine feldspar phyric basalt |
| Comments: | Mn- crust <1 mm, abundant altered olivine phenocryst, vesicles and veins appeared to be partially filled with Fe rich clay, black grains might be Mn oxide/particles of volcanic crust. |