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Event details
| Voyage: | IN2020_V01 [details] |
| When: | 2020-02-15 18:56:56 UTC |
| Log: | Geology_Rocks_in2020_v01 |
| Equipment: | Not specified |
| Position: | Latitude: -43.8804 Longitude: 87.3269 Position from underway logging |
| Sample number: | IN2020_V01_D12_013 |
| Dredge: | D12 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | yes, in IN2020_V01_D12_013 |
| Number of photos: | 3 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-light |
| Composition: | felsic |
| Alteration: | altered |
| Phenocryst mineralogy: | feldspar | quartz | biotite | amphibole | other |
| Phenocryst abundance (%): | 10 |
| Phenocryst size range (mm): | 1-7 |
| Groundmass: | microcrystaline |
| Vesicle abundance: | absent |
| Sample bagged: | yes |
| Bucket number: | MQU6 (D08/D09/D12 1 of 2) |
| Rock name: | weakly altered phaneritic microcrystalline felsic rock |
| Original Sample Dimensions: | 6.5x5.5x3 cm |
| Comments: | haematite staining; calcite alteration. Feldspar is partly altered. Too much quartz for andesite? |