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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-21 12:57:34 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -13.3073 Longitude: 154.3839 Position from underway logging |
| Sample number: | in2019_v04_D33-016 |
| Dredge: | D33 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | brown |
| Composition: | sedimentary |
| Alteration: | Fresh | Mn crust | altered |
| Grain size: | silt |
| Grain shape: | rounded |
| Sorting: | good |
| Sample bagged: | yes |
| Bucket number: | 49 |
| Rock name: | Trace fossil mudstone |
| Comments: | silt. 80 mm Mn crust. Silt-rich mudstone. Contains dwelling structure trace fossils more like simple vertical burrows both altered and fresh surface. Burrow's tubes have a Mn-oxide wall (it probably preserved them). Burrows are filled with clay or foraminifera. There are thin Mn-oxide layers in the mudstone itself (in cracks?) |