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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-28 22:17:34 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.0775 Longitude: 159.217 Position from underway logging |
| Sample number: | in2019_v04_D48_011 |
| Dredge: | D48 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | grey-light | white | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] | pyroxene |
| Phenocryst abundance (%): | 8 |
| Phenocryst size range (mm): | 0.05 - 5 |
| Groundmass: | microcrystaline |
| Vesicle abundance: | 30-50% |
| Vesicle Filling (%): | 5 |
| Vesicle fill: | Zeolite, mud |
| Sample bagged: | yes |
| Bucket number: | 83 |
| Rock name: | Highly vesicular, phyritic olvine basalt |
| Comments: | Mn-crust < 0.5 mm, vesicles largest at the centre, very minor fizz from HCl, residual carbonae?, very altered phenocrysts, rounded vesicles |