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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-23 22:31:59 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -10.2705 Longitude: 157.3097 Position from underway logging |
Sample number: | in2019_v04_D36-038 |
Dredge: | D36 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 3 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | grey-light | red | green |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst mineralogy: | feldspar |
Phenocryst abundance (%): | 15 |
Phenocryst size range (mm): | 1 |
Groundmass: | microcrystaline | altered |
Vesicle abundance: | 10-30% |
Vesicle Filling (%): | 50 |
Vesicle fill: | Clay |
Grain size: | pebble (2-64 mm) |
Grain shape: | angular |
Sorting: | poor |
Components: | pumice | volcanic vesicular | volcanic non-vesicular |
Sample bagged: | yes |
Bucket number: | 64 |
Rock name: | Altered poorly sorted basalt breccia |
Comments: | Green alteration ~ 20 mm long. White veins - eventually quartz? Fe2)3 alteration. Pumice like rock included in breccia. Clast supported matrix |