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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-31 22:15:21 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -23.9197 Longitude: 159.3087 Position from underway logging |
| Sample number: | in2019_v04_D54_007 |
| Dredge: | D54 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | white | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | olivine[iddingsite] | pyroxene |
| Phenocryst abundance (%): | 10 |
| Phenocryst size range (mm): | 4 |
| Groundmass: | microcrystaline | altered |
| Vesicle abundance: | <10% |
| Vesicle Filling (%): | 0 |
| Grain size: | sand (<2 mm) |
| Grain shape: | angular |
| Sorting: | poor |
| Components: | volcanic vesicular |
| Cement: | calcite |
| Sample bagged: | yes |
| Bucket number: | 91 |
| Rock name: | poorly sorted weakly to moderatly altered olivine-phyric basalt clast breccia |
| Comments: | Mn-crust <0.5 - 3 mm, eventually feldspar visible (one white long shaped crystal), Fe oxide alteration in red/brown, calcite crust overlys areas of basalt clasts, olivine iddingsite large (4 mm) |