Lithology description, textural and structural observations, and indications for ground ice of sediment core CRP-2 (Table 1-4)

From the upper 300 m of CRP-2/2A, twenty-six samples of diamicts and deformation structures have been thin sectioned. These have been analysed for texture, structure, diagenesis and plasmic fabric. The combination of certain microstructures (e.g. turbate and linear) and plasmic fabric development is...

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Bibliographic Details
Main Author: van der Meer, Jaap
Format: Dataset
Language:English
Published: PANGAEA 2000
Subjects:
14.2 km at 096° true from Cape Roberts
Cape Roberts Project
Clast shape
Core wireline system
CRP
CRP-2
CRP-2A
CWS
Depth
bottom/max
sediment/rock
top/min
Diagenesis
Distribution
Event label
Fabric
Interpretation
Lithologic unit/sequence
Lithology/composition/facies
off Cape Roberts
Ross Sea
Antarctica
Sample code/label
Sampling/drilling from ice
Sequence identifier
Size
Structure
Cape Roberts
Roberts Cape
Antarc*
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.451856
https://doi.org/10.1594/PANGAEA.451856
Description
Summary:From the upper 300 m of CRP-2/2A, twenty-six samples of diamicts and deformation structures have been thin sectioned. These have been analysed for texture, structure, diagenesis and plasmic fabric. The combination of certain microstructures (e.g. turbate and linear) and plasmic fabric development is indicative of grounded ice. Clear evidence for two grounded ice events (three samples) was found in the upper Oligocene part of the core. The interpretation of ten more samples is less certain, but as for CRP-1, is taken to point to grounded ice as well. There is a strong correlation between these indications for grounded ice and the basal part of cycles in the sequence stratigraphy.

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