Environmental analysis on sediment core CRP-2 from the Ross Sea, Antarctica

Cape Roberts Project drill core 2/2A was obtained from Roberts Ridge, a sea-floor high located at 77° S, 16 km offshore from Cape Roberts in western McMurdo Sound, Antarctica. The recovered core is about 624 m long and includes strata dated as being Quaternary, Pliocene, Miocene and Oligocene in age...

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Bibliographic Details
Main Authors: Powell, Ross, Krissek, Lawrence A, van der Meer, Jaap
Format: Dataset
Language:English
Published: PANGAEA 2000
Subjects:
14.2 km at 096° true from Cape Roberts
Cape Roberts Project
Core wireline system
CRP
CRP-2
CRP-2A
CWS
off Cape Roberts
Ross Sea
Antarctica
Sampling/drilling from ice
Cape Roberts
McMurdo Sound
Roberts Cape
Roberts Ridge
Antarc*
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.510752
https://doi.org/10.1594/PANGAEA.510752
Description
Summary:Cape Roberts Project drill core 2/2A was obtained from Roberts Ridge, a sea-floor high located at 77° S, 16 km offshore from Cape Roberts in western McMurdo Sound, Antarctica. The recovered core is about 624 m long and includes strata dated as being Quaternary, Pliocene, Miocene and Oligocene in age. The core includes twelve facies commonly occurring in associations that are repeated in particular sequences throughout the core and which are interpreted as representing different depositional environments through time. Depositional systems inferred to be represented in the succession include: outer shelf with minor iceberg influence, outer shelf-inner shelf-nearshore to shoreface under iceberg influence, deltaic and/or grounding-line fan, and ice proximal-ice marginal-subglacial (mass flow/rainout diamictite/subglacial till) singly or in combination. Changes in palaeoenvironmental interpretations up the core are used to estimate relative glacial proximity to the site through time. These inferred glacial fluctuations are then compared with the global eustatic sea level and d18O curves to evaluate the potential of glacial fluctuations on Antarctica influencing these records of global change. Although the comparisons are tentative at present, the records do have similarities, but there are also some differences especially in possible number (and perhaps magnitude) of glacial fluctuations that require further evaluation.

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