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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-17 23:53:07 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -14.3289 Longitude: 156.2189 Position from underway logging |
| Sample number: | in2019_v04_D24_004 |
| Dredge: | D24 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 5 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | grey-light | white | red | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar |
| Phenocryst abundance (%): | >20 |
| Phenocryst size range (mm): | 0.5-1 |
| Groundmass: | microcrystaline | banded | altered |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | 10 |
| Vesicle fill: | Calcite, greenish filling -> celadonite? |
| Alteration: | Mn crust | altered |
| Grain size: | sand (<2 mm) |
| Grain shape: | mixture |
| Sorting: | poor |
| Cement: | calcite | zeolite |
| Sample bagged: | yes |
| Bucket number: | 36 |
| Rock name: | Highly altered polymictic feldspar phyric clast bearing breccia |
| Comments: | Feldspare phenocrysts range in size (0.5-1mm); highly altered matrix with abundant vesicles; vesicle size range in size and filling (calcite/zeolite/greeenish filling may be celadonite); banded reddish brown fragments alignment |