Visual stratigraphy of the EastGRIP ice core (14 m - 2021 m depth, drilling period 2017-2019) ...

A continuous high-resolution record of digital images in dark field illumination mode were taken from the East Greenland Ice Core Project (EastGRIP or EGRIP) ice core (Latitude: 75.630000 Longitude: -35.980000) in the depth interval from 14 m to 2121 m of depth. Stratigraphic layering in the monomin...

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Bibliographic Details
Main Authors: Weikusat, Ilka, Westhoff, Julien, Kipfstuhl, Sepp, Jansen, Daniela
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
dark field
indirect light scattering
mesoscale deformation features
structural glaciology
Visual stratigraphy linescanner
File name
Binary Object
Depth, top/min
Depth, bottom/max
DEPTH, ice/snow
Bag number
Integration option
Focus level, modified
Ice drill
GL-Land_2017_EGRIP
GL-Land_2018_EGRIP
GL-Land_2019_EGRIP
AWI Arctic Land Expedition
Arctic
Greenland
East Greenland
East Greenland Ice-core Project
Greenland ice core
Greenland Ice core Project
ice core
Online Access:https://dx.doi.org/10.1594/pangaea.925014
https://doi.pangaea.de/10.1594/PANGAEA.925014
Description
Summary:A continuous high-resolution record of digital images in dark field illumination mode were taken from the East Greenland Ice Core Project (EastGRIP or EGRIP) ice core (Latitude: 75.630000 Longitude: -35.980000) in the depth interval from 14 m to 2121 m of depth. Stratigraphic layering in the monomineralic, and transparent polar ice is made visible in this optical setup by light scattering on second phase particles (e.g. particulate impurities such as dust, air bubbles, air clathrate hydrates) and interfaces in the polycrystal (e.g. grain boundaries, cracks and breaks). The layers are clearly visible throughout the Glacial period (> ca. 1375 m) with the most prominent and frequent ones being associated with the coldest events, also called "cloudy bands" and "clear bands". The layering firstly and mainly is depositional bedding inherited from snow accumulation and thus is assumed to be horizontal originally by representing isochrones. With increasing depth bedding can become deformed by ice flow showing ...

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