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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-24 03:53:41 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -10.5245 Longitude: 157.3327 Position from underway logging |
| Sample number: | in2019_v04_D37-036 |
| Dredge: | D37 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 6 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | red |
| Composition: | mafic |
| Alteration: | altered |
| Phenocryst mineralogy: | feldspar | pyroxene | altered |
| Phenocryst abundance (%): | 5-7 |
| Phenocryst size range (mm): | <2mm |
| Groundmass: | microcrystaline |
| Vesicle abundance: | <10% |
| Vesicle fill: | iron-oxide, zeolites |
| Sample bagged: | yes |
| Bucket number: | 73 |
| Rock name: | Iron-oxide altered, feldspar-pyroxene phyric basalt |
| Comments: | altered ferromagnesium minerals (?), verins of calcite through basalt. Red to black altered pyroxene. Some feldspar phenocrysts. Few vesicles. |