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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-21 01:01:15 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -12.6487 Longitude: 153.6429 Position from underway logging |
Sample number: | in2019_v04_D32_017 |
Dredge: | D32 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 4 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | grey-dark | grey-light |
Composition: | mafic |
Phenocryst mineralogy: | feldspar | olivine[iddingsite] | amphibole |
Phenocryst abundance (%): | 5 |
Phenocryst size range (mm): | <1 |
Groundmass: | microcrystaline |
Vesicle abundance: | absent |
Sample bagged: | yes |
Bucket number: | 45 |
Rock name: | Altered microcrystalline basalt |
Comments: | Mn Crust <1 mm, small phenocrysts seen with microscope, have a shape like olivine or amphibole, they are very alteres if they are. |