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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-28 23:00:55 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.2145 Longitude: 159.1899 Position from underway logging |
| Sample number: | in2019_v04_D48_017 |
| 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 | red | brown |
| Composition: | mafic |
| Alteration: | altered |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] |
| Phenocryst abundance (%): | 10 |
| Phenocryst size range (mm): | 1-2 |
| Groundmass: | altered |
| Vesicle abundance: | >50% |
| Vesicle Filling (%): | 60 |
| Vesicle fill: | Clay, zeolite |
| Grain size: | pebble (2-64 mm) |
| Grain shape: | angular |
| Sorting: | poor |
| Components: | volcanic vesicular |
| Cement: | zeolite |
| Sample bagged: | yes |
| Bucket number: | 84 |
| Rock name: | Altered vesicular olivine-phyric basalt breccia |
| Comments: | Some vesicular basalt clasts have groundmass altered entirely to iron oxide, Mn dendrites but no crust, some ittegular shaped vesicles, clast supported. |