Data · collection
Exposure ages of glacial deposits in the Ford Ranges, Marie Byrd Land, West Antarctica
Listed in NASA Earthdata CMR
This data set consists of exposure ages for glacial deposits and glaciated bedrock surfaces in the Ford Ranges, Marie Byrd Land, West Antarctica.
Description
Most samples are glacially transported clasts exposed during the retreat of ice since the last glacial maximum, 10,500 yr B.P. to present. There are a few bedrock samples with longer and more complicated exposure histories.
The ages are based on concentrations of the cosmic-ray-produced nuclides Be-10 and Al-26. The primary data are sample locations and exposure ages. Ages are calculated using currently accepted nuclide production rates and correction factors.
Read the rest (1 more)
The data set also contains all details of the chemical and isotopic analyses needed to re-compute exposure ages if nuclide production rates or correction factors are revised in future.
Links
Get the data
- GET DATA depts.washington.edu/cosmolab/data/MBL_exp_ages.html ↗
download · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214612411-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214612411-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Glaciation · Glacier Elevation/Ice Sheet Elevation · Ice Extent · Not provided
- Inferred from text
- Physical geography and environmental geoscience 70%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214612411-SCIOPS | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3709 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (70%) |
| concepts[measured_variable].gcmd:earth-science/cryosphere/glaciers-ice-sheets/glacier-elevation-ice-sheet-elevation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/cryosphere/snow-ice/ice-extent | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/paleoclimate/land-records/glaciation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:not-provided | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |