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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-21 10:25:12 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -13.4256 Longitude: 153.9392 Position from underway logging |
| Sample number: | in2019_v04_D33-013 |
| Dredge: | D33 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 3 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | brown |
| Composition: | sedimentary |
| Alteration: | Fresh | Mn crust | altered |
| Grain size: | silt |
| Grain shape: | rounded |
| Sorting: | good |
| Components: | other |
| Sample bagged: | yes |
| Bucket number: | 48 |
| Rock name: | Trace fossil rich mudstone |
| Comments: | Mn crust 18 mm thick. A silt rich mudstone? Trace fossils include dwelling structures? more like simple vertical tubes (see sketch) - thick Mn layers are found in the mudstone itself - whole rock is full of vertical burrows - all burrows have an Mn layer on their wall and some of them are fully or partially filled with Mn oxide, clay or foraminifera ooze? |