| Description |
|---|
| Material: | Not Provided |
| Classification: | Not Provided |
| Field Name: | Not Provided |
| Description: | Large group of dark grayish-brown, potato-sized, colloform or botryoidal manganese nodules associated with a few intermediate igneous rocks and many smaller manganese fragments. The number of nodules present is about 160. Many are nearly spherical others are flattened and slablike, while still others have been formed by the joining together of smaller globular nodules. The average size is close to 6 x 5.5 x 5 cm. The concentric layering on the nodules is obvious because some have partially exfoliated. The nuclei are either igneous rocks or pieces of indurated lutite that are commonly stained with oxide. Two of the igneous rocks examined have gray-colored groundmasses, one which is microcrystalline and the other cryptocrystalline. Both have inclusions of quartz. In one specimen the quartz is >10%, and there are in addition veins of silica glass. The rock is possibly a dacite. In the other specimen, cleavage faces of quartz can be seen under the microscope embedded in the cryptocrystalline groundmass. The rock may be either a dacite or quartz basalt. A third igneous rock examined has a dull brown microcrystalline groundmass. In it are quartz phenocrysts and abundant dark minerals-probably mostly pyroxenes. The rock may be a dacite. Most of the rocks are coated on their outside surfaces with iron oxide. |
| Age (min): | Not Provided |
| Age (max): | Not Provided |
| Collection Method: | Dredging |
| Collection Method Description: | Not Provided |
| Size: | Not Provided |
| Geological Age: | Not Provided |
| Geological Unit: | Not Provided |
| Comment: | Not Provided |
| Purpose: | Not Provided |
| Geolocation |
|---|
| Latitude Start (WGS84): | 14.4166 |
| Latitude End: | Not Provided |
| Longitude Start (WGS84): | -145.8666 |
| Longitude End: | Not Provided |
| Northing (m) (UTM NAD83): | Not Provided |
| Easting (m) (UTM NAD83): | Not Provided |
| Zone: | Not Provided |
| Vertical Datum: | Not Provided |
| Elevation Start: | -4618 meters |
| Elevation End: | Not Provided |
| Nav Type: | Not Provided |
| Physiographic Feature: | N part of Clarion Fracture Zone. |
| Name Of Physiographic Feature: | Not Provided |
| Location Description: | Not Provided |
| Locality: | Not Provided |
| Locality Description: | Not Provided |
| Country: | Not Provided |
| State/Province: | Not Provided |
| County: | Not Provided |
| City: | Not Provided |
| Collection |
|---|
| Field Program/Cruise: | VM0020 |
| Platform Type: | Ship |
| Platform Name: | Vema |
| Platform Description: | Not Provided |
| Launch Type: | Not Provided |
| Launch Platform Name: | Not Provided |
| Launch ID: | Not Provided |
| Collector/Chief Scientist: | Not Provided |
| Collector/Chief Scientist Detail: | Not Provided |
| Collection Start Date: | 1964-04-10 |
| Collection End Date: | Not Provided |
| Curation |
|---|
| Current Archive: | Lamont-Doherty Core Repository at Columbia University (LDCR) |
| Current Archive Contact Details: | Nichole Anest, peridote@ldeo.columbia.edu |
| Original Archive: | Not Provided |
| Original Archive Contact Details: | Not Provided |
| Related Samples |
|---|
Parents: | No Parents | | Siblings: | No Siblings |
| Children: | No Children |
