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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-24 10:56:43 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -10.9857 Longitude: 157.488 Position from underway logging |
| Sample number: | in2019_v04_D36-007 |
| Dredge: | D36 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 5 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-dark | brown | green |
| Composition: | mafic |
| Alteration: | Mn crust |
| Phenocryst mineralogy: | feldspar | pyroxene |
| Groundmass: | crystalline |
| Features: | volcanic brecciated |
| Vesicle abundance: | absent |
| Grain size: | silt | sand (<2 mm) | pebble (2-64 mm) |
| Grain shape: | mixture |
| Sorting: | poor |
| Components: | volcanic non-vesicular | other |
| Sample bagged: | yes |
| Bucket number: | 59 |
| Rock name: | Massive Dolerite Clast within Breccia (?) |
| Comments: | Abundant plagioclase laths - possibly more intermediate than mafic. Black pyroxene crystals. Cross cut by zeolite veins. Small slither of brecciated material along one side of larger clast. Some red alteration of pyroxenes. Green hue of rock-alteration (?). |