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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-31 12:02:27 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -22.9558 Longitude: 159.7909 Position from underway logging |
| Sample number: | in2019_v04_D53-008 |
| Dredge: | D53 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 3 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | white |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | olivine[iddingsite] |
| Phenocryst abundance (%): | 40 |
| Phenocryst size range (mm): | 0.5-7 mm |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | <10% |
| Vesicle fill: | calcite? |
| Sample bagged: | yes |
| Bucket number: | 91 |
| Rock name: | Altered iddingsite-phyric basalt |
| Comments: | 60 mm Mn crust. Felspar laths in groundmass? Large (up to 7 mm) iddingsite crystals, almost completely replaced by clay. |