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Event details
Voyage: | IN2018_V08 [details] |
When: | 2019-01-02 05:21:05 UTC |
Log: | Geology_Rocks_in2018_v08 |
Equipment: | Not specified |
Position: | Latitude: -37.6119 Longitude: 156.2831 Position from underway logging |
Sample number: | IN2018_V08_D09_005 |
Dredge: | 09 |
Dredge Date: | 2/1/19 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Sample sawn: | Yes |
Sawn sample photographed: | Yes |
Number of photos: | 2 |
Colour: | black | grey-dark |
Composition: | mafic |
Alteration: | Fresh | Mn crust |
Phenocryst mineralogy: | feldspar |
Phenocryst abundance (%): | 2 |
Phenocryst size range (mm): | 1-2 |
Groundmass: | microcrystaline |
Vesicle abundance: | high (>50%) |
Sample bagged: | yes |
Sticker: | yes |
Bucket number: | 025 |
Rock name: | feldspar phyric vesicular basalt |
Comments: | 1-2cm mn crust. 1-2cm alteration rim between fresh lava and mn crust. highly vesicular with some clay filled amygdales. most vesicles are spherical with diameters 1mm-3mm. |