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Event details
| Voyage: | IN2018_V08 [details] |
| When: | 2018-12-29 05:07:59 UTC |
| Log: | Geology_Rocks_in2018_v08 |
| Equipment: | Not specified |
| Position: | Latitude: -39.9922 Longitude: 157.1653 Position from underway logging |
| Sample number: | IN2018_V08_D01_013 |
| Dredge: | 01 |
| Dredge Date: | 28/12/2018 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Sample sawn: | Yes |
| Sawn sample photographed: | Yes |
| Number of photos: | 8 |
| Colour: | black | grey-dark | red | brown |
| Composition: | mafic |
| Alteration: | Fresh | Mn crust | altered |
| Grain size: | pebble (2-64 mm) |
| Grain shape: | rounded |
| Sorting: | moderate |
| Components: | scoria | volcanic non-vesicular |
| Phenocryst mineralogy: | feldspar | altered |
| Phenocryst abundance (%): | 5 |
| Phenocryst size range (mm): | 1 |
| Groundmass: | microcrystaline | altered |
| Vesicle abundance: | low (<30%) |
| Sample bagged: | yes |
| Sticker: | yes |
| Bucket number: | 003 |
| Rock name: | polymictic volcanic conglomerate enclosed in a volcanic breccia |
| Comments: | two stages of evolution, with a volcanic conglomerate included within a later stage volcanics |