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Event details
Voyage: | IN2020_V01 [details] |
When: | 2020-02-21 18:28:41 UTC |
Log: | Geology_Rocks_in2020_v01 |
Equipment: | Not specified |
Position: | Latitude: -32.3876 Longitude: 101.7616 Position from underway logging |
Sample number: | IN2020_V01_D09_032 |
Dredge: | D09 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | yes, in IN2020_V01_D09_032 |
Number of photos: | 7 |
Sample sawn: | Yes |
Colour: | grey-light | brown |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst abundance (%): | 0 |
Groundmass: | altered | crystalline |
Mn crust thickness (mm): | 8 |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 100 |
Vesicle fill: | Black mineral |
Sample bagged: | yes |
Bucket number: | 6 of 6 |
Rock name: | Weak to moderately altered fine-grained basalt |
Original Sample Dimensions: | 37.5x34x23 cm |
Comments: | Partial sample kept. Small zone of concentrated vesicles (area ~5x2 cm), mica-alterated pseudomorphs after phenocrysts (~10% abundance, 2-4 mm size). Minor fracturing. |