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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-19 20:18:24 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -14.0453 Longitude: 155.5375 Position from underway logging |
Sample number: | in2019_v04_D30_008 |
Dredge: | D30 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 3 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | brown |
Composition: | mafic |
Phenocryst mineralogy: | feldspar |
Phenocryst abundance (%): | 5 |
Phenocryst size range (mm): | 2 |
Groundmass: | microcrystaline |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 100 |
Vesicle fill: | clacite |
Alteration: | Mn crust |
Sample bagged: | yes |
Bucket number: | 41 |
Rock name: | Sparsely feldspar phyric basalt |
Comments: | Mn - crust 20 mm, some phenocrysts that look like amphibole are actually just altered feldspar, calcite infilled veins. |