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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-24 03:48:04 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -10.5244 Longitude: 157.3329 Position from underway logging |
| Sample number: | in2019_v04_D37-034 |
| Dredge: | D37 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 8 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | grey-light | white | green |
| Composition: | mafic |
| Alteration: | altered |
| Phenocryst mineralogy: | feldspar |
| Phenocryst abundance (%): | 30 |
| Phenocryst size range (mm): | 2-10mm |
| Groundmass: | microcrystaline | altered |
| Vesicle abundance: | absent |
| Sample bagged: | yes |
| Bucket number: | 72 |
| Rock name: | Altered porphyriticfeldspar-bearing dolerite |
| Comments: | domainal alteration to phyllosilicates, streaky black alteration - iron-manganese oxide |