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Comparative studies of pebble and sediments from known sedimentary environments (Taylor Glacier, Table Mountain and Crary Ice Rise) with those found in a DVDP core

Listed in NASA Earthdata CMR

Examination of the cores from the Dry Valley Drilling Project consisted of, among other studies, grain size, pebble and magnetic investigations.

Description

Pebble and sediment sampling from known sedimentary environments was needed to get 'baseline' data to help interpret data from the drill core samples. The areas visited included the Taylor Glacier, Table Mountain and the Crary Ice Rise.

At the Crary Ice Rise, a patch of dirty ice was discovered and investigated to understand the character of sediment trapped in the ice of the Ross Ice Shelf. About 120 samples were taken from a core drilled by the Dry Valley Drilling Project and a further 100 were taken from around Table Mountain, Taylor Glacier and New Harbour for comparative study. Two layers of ground moraine separated by river gravels at 1800m on Table Mountain were found and indicate two distinct periods of temperate glaciation separated by a warm period.

Read the rest (2 more)

Sea water was discovered in a rift on the Crary Ice Rise near the head of the Ross Ice Shelf. The rift, about 15m deep and 2m wide, has a foor of ice 10cm thick, which can easily be broken. The water beneath is salty and has the same freezing point and salinity as normal sea water.

Samples collected give data on the nature of the sea beneath the ice shelf. Soundings were also taken around the drill site and show it to be on a broad northeast trending ridge between the submarine extensions of the Ferrar and Taylor Valleys. Bottom samples indicate the sea floor is a mantle of muddy sand with occasional pebbles.

Links

Get the data

  • pet.gns.cri.nz ↗

    Collected samples are held in the PETLAB database of GNS Science. Search under Collector = R Plume, P Barrett and R.D. Powell and Country = Antarctica.

    download · from NASA CMR

Catalogue records · 2

Topics

Provenance · 1 source records, 15 field assertions
SourceKeyLast seenRaw
NASA Earthdata CMRC1214594113-SCIOPS13 d agoJSON v1
FieldAssertionExtractorEvidence
access_levelsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[field].anzsrc:group:3709enrichment · NASA CMRtaxonomy-embedding@1.1.0title+keywords+description (74%)
concepts[instrument].gcmd_instrument:visual-observationssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/paleoclimate/land-records/sedimentssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/solid-earth/rocks-minerals-crystals/sedimentssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[modality].local:modality:tabularenrichment · NASA CMRkeyword-concept-rules@1.0.0title+description (65%)
concepts[platform].gcmd_platform:field-investigationsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:field-surveyssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:ground-based-observationssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:not-providedsource · NASA CMRconnector:nasa_cmr@1.0.0
descriptionsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/Abstract
spatialsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/SpatialExtent
temporalsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/TemporalExtents
titlesource · NASA CMRconnector:nasa_cmr@1.0.0/umm/EntryTitle
version_labelsource · NASA CMRconnector:nasa_cmr@1.0.0