Summary of Results from CRP-1, Cape Roberts Project, Antarctica
Poorly consolidated diamicton, silt, sand, gravel, and a mixed skeletal carbonate-terrigenous facies was cored from 16 m down to 43.55 mbsf and dated as 1.25 to 1.80 Ma (early Quaternary) from diatom biostratigraphy. Depositional environments range among 1) possible terrestrial exposure, 2) glacimar...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Montclair State University Digital Commons
1998
|
Subjects: | |
Online Access: | https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/557 |
id |
ftmontclairstuni:oai:digitalcommons.montclair.edu:earth-environ-studies-facpubs-1556 |
---|---|
record_format |
openpolar |
spelling |
ftmontclairstuni:oai:digitalcommons.montclair.edu:earth-environ-studies-facpubs-1556 2023-07-23T04:15:42+02:00 Summary of Results from CRP-1, Cape Roberts Project, Antarctica Robert, Cape Anderson, John Armienti, Pietro Atkins, Cliff Barrett, P. Bohaty, S. Bryce, Sonya Claps, Michele Curran, Mark A.J. Davey, Fred J. De Santis, Laura Ehrmann, Werner Florindo, Fabio Fielding, Christopher Hambrey, Michael J. Hannah, Michael Harwood, David M. Henrys, Stuart Hoelscher, Ferdinand Howe, John Andrew Jarrard, Richard Kettler, Richard Kooyman, Sherry Kopsch, C. Krissek, L. Lavelle, Mark Levac, Elizabeth Niessen, F. Passchier, Sandra Paulsen, Timothy 1998-12-01T08:00:00Z https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/557 unknown Montclair State University Digital Commons https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/557 Department of Earth and Environmental Studies Faculty Scholarship and Creative Works text 1998 ftmontclairstuni 2023-07-03T21:48:55Z Poorly consolidated diamicton, silt, sand, gravel, and a mixed skeletal carbonate-terrigenous facies was cored from 16 m down to 43.55 mbsf and dated as 1.25 to 1.80 Ma (early Quaternary) from diatom biostratigraphy. Depositional environments range among 1) possible terrestrial exposure, 2) glacimarine sedimentation from nearby glacier ice, 3) deposition under sea-ice like today and 4) shallow-marine sea-ice free carbonate sedimentation, representing much warmer temperatures than today. At least two cycles of rise and fall in sea level are recognised. The pre-Quaternary section comprises mainly diamictite, sandstone and siltstone, organised in a cyclic fashion considered to reflect 6-8 variations in relative sea level and/or glacial advance-retreat. Depositional environments were largely shallow-water glacimarine with sedimentation associated with temperate-glacier termini. Diatom biostratigraphy and magnetostratigraphy indicate the strata range from 22.4 to 17.5 Ma in age (average sediment accumulation rate of 21 m/my). These strata record the first extensive Neogene volcanism in the region around 18 my ago, and contain the first post-Eocene marine-dinoflagellate assemblage (at least 15 new species). Another first report is of the calcareous dinoflagellate (Thoracosphaera), found in both Miocene and Quaternary sediment at CRP-1. The pre-Quaternary section of CRP-1 reaches down almost to the base of seismic Unit V3, previously interpreted as representing mid-Oligocene shallowing and glacial advance in the Victoria Land Basin. Results from CRP-1 suggests that the base of V3 could be as much as 8 my younger. This should be resolved by future drilling planned off Cape Roberts. Text Antarc* Antarctica Sea ice Victoria Land Montclair State University Digital Commons Victoria Land Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) Strata Range ENVELOPE(-129.087,-129.087,56.400,56.400) |
institution |
Open Polar |
collection |
Montclair State University Digital Commons |
op_collection_id |
ftmontclairstuni |
language |
unknown |
description |
Poorly consolidated diamicton, silt, sand, gravel, and a mixed skeletal carbonate-terrigenous facies was cored from 16 m down to 43.55 mbsf and dated as 1.25 to 1.80 Ma (early Quaternary) from diatom biostratigraphy. Depositional environments range among 1) possible terrestrial exposure, 2) glacimarine sedimentation from nearby glacier ice, 3) deposition under sea-ice like today and 4) shallow-marine sea-ice free carbonate sedimentation, representing much warmer temperatures than today. At least two cycles of rise and fall in sea level are recognised. The pre-Quaternary section comprises mainly diamictite, sandstone and siltstone, organised in a cyclic fashion considered to reflect 6-8 variations in relative sea level and/or glacial advance-retreat. Depositional environments were largely shallow-water glacimarine with sedimentation associated with temperate-glacier termini. Diatom biostratigraphy and magnetostratigraphy indicate the strata range from 22.4 to 17.5 Ma in age (average sediment accumulation rate of 21 m/my). These strata record the first extensive Neogene volcanism in the region around 18 my ago, and contain the first post-Eocene marine-dinoflagellate assemblage (at least 15 new species). Another first report is of the calcareous dinoflagellate (Thoracosphaera), found in both Miocene and Quaternary sediment at CRP-1. The pre-Quaternary section of CRP-1 reaches down almost to the base of seismic Unit V3, previously interpreted as representing mid-Oligocene shallowing and glacial advance in the Victoria Land Basin. Results from CRP-1 suggests that the base of V3 could be as much as 8 my younger. This should be resolved by future drilling planned off Cape Roberts. |
format |
Text |
author |
Robert, Cape Anderson, John Armienti, Pietro Atkins, Cliff Barrett, P. Bohaty, S. Bryce, Sonya Claps, Michele Curran, Mark A.J. Davey, Fred J. De Santis, Laura Ehrmann, Werner Florindo, Fabio Fielding, Christopher Hambrey, Michael J. Hannah, Michael Harwood, David M. Henrys, Stuart Hoelscher, Ferdinand Howe, John Andrew Jarrard, Richard Kettler, Richard Kooyman, Sherry Kopsch, C. Krissek, L. Lavelle, Mark Levac, Elizabeth Niessen, F. Passchier, Sandra Paulsen, Timothy |
spellingShingle |
Robert, Cape Anderson, John Armienti, Pietro Atkins, Cliff Barrett, P. Bohaty, S. Bryce, Sonya Claps, Michele Curran, Mark A.J. Davey, Fred J. De Santis, Laura Ehrmann, Werner Florindo, Fabio Fielding, Christopher Hambrey, Michael J. Hannah, Michael Harwood, David M. Henrys, Stuart Hoelscher, Ferdinand Howe, John Andrew Jarrard, Richard Kettler, Richard Kooyman, Sherry Kopsch, C. Krissek, L. Lavelle, Mark Levac, Elizabeth Niessen, F. Passchier, Sandra Paulsen, Timothy Summary of Results from CRP-1, Cape Roberts Project, Antarctica |
author_facet |
Robert, Cape Anderson, John Armienti, Pietro Atkins, Cliff Barrett, P. Bohaty, S. Bryce, Sonya Claps, Michele Curran, Mark A.J. Davey, Fred J. De Santis, Laura Ehrmann, Werner Florindo, Fabio Fielding, Christopher Hambrey, Michael J. Hannah, Michael Harwood, David M. Henrys, Stuart Hoelscher, Ferdinand Howe, John Andrew Jarrard, Richard Kettler, Richard Kooyman, Sherry Kopsch, C. Krissek, L. Lavelle, Mark Levac, Elizabeth Niessen, F. Passchier, Sandra Paulsen, Timothy |
author_sort |
Robert, Cape |
title |
Summary of Results from CRP-1, Cape Roberts Project, Antarctica |
title_short |
Summary of Results from CRP-1, Cape Roberts Project, Antarctica |
title_full |
Summary of Results from CRP-1, Cape Roberts Project, Antarctica |
title_fullStr |
Summary of Results from CRP-1, Cape Roberts Project, Antarctica |
title_full_unstemmed |
Summary of Results from CRP-1, Cape Roberts Project, Antarctica |
title_sort |
summary of results from crp-1, cape roberts project, antarctica |
publisher |
Montclair State University Digital Commons |
publishDate |
1998 |
url |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/557 |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(-129.087,-129.087,56.400,56.400) |
geographic |
Victoria Land Cape Roberts Strata Range |
geographic_facet |
Victoria Land Cape Roberts Strata Range |
genre |
Antarc* Antarctica Sea ice Victoria Land |
genre_facet |
Antarc* Antarctica Sea ice Victoria Land |
op_source |
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works |
op_relation |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/557 |
_version_ |
1772176628750745600 |