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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-13 13:27:17 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -19.1634 Longitude: 155.4784 Position from underway logging |
| Sample number: | in2019_v04_D12_013 |
| Dredge: | D12 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 2 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | red | brown |
| Composition: | mafic |
| Features: | volcanic brecciated |
| Sample bagged: | yes |
| Bucket number: | 26 |
| Rock name: | Volcanic breccia, potentially containing muscovite |
| Comments: | Muscovite? Could be weathered biotic.Bearing xenolith. Both halves of this rock contain mined flakes < 1mm that are vitreous and have perfect cleavage. Land based analysis to determine if this is mica. Either Muscovite mica or altered biotic mica or is this zeolite? Question is this mica from a xenolith? The smaller piece contains areas that look like larger olivine/pyroxene crystals (around 3-4 mm wide) were dissolved out of the rock? |