Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments
Albian turbidites and intercalated shales were cored from ~1145 to 1700 meters below seafloor at Site 1276 in the Newfoundland Basin. Strata at this level dip ~2.5° seaward (toward an azimuth of ~130°) based on seismic profiles. In contrast, beds dip an average of ~10° in the cores. This higher appa...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.776586 2024-09-15T18:20:17+00:00 Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments Hiscott, Richard N LATITUDE: 45.405330 * LONGITUDE: -44.785830 * DATE/TIME START: 2003-02-09T16:20:00 * DATE/TIME END: 2003-07-16T08:44:00 2007 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.776586 https://doi.org/10.1594/PANGAEA.776586 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.776586 https://doi.org/10.1594/PANGAEA.776586 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Hiscott, Richard N (2007): Paleoflow directions of Albian basin-floor turbidity currents in the Newfoundland Basin. In: Tucholke, B.E., Sibuet, J.-C., and Klaus, A. (Eds.), Proc. ODP, Sci. Results, 210 : College Station, TX (Ocean Drilling Program), 210, 1-27, https://doi.org/10.2973/odp.proc.sr.210.103.2007 210-1276A DRILL Drilling/drill rig Joides Resolution Leg210 North Atlantic Ocean Ocean Drilling Program ODP dataset publication series 2007 ftpangaea https://doi.org/10.1594/PANGAEA.77658610.2973/odp.proc.sr.210.103.2007 2024-08-21T00:02:25Z Albian turbidites and intercalated shales were cored from ~1145 to 1700 meters below seafloor at Site 1276 in the Newfoundland Basin. Strata at this level dip ~2.5° seaward (toward an azimuth of ~130°) based on seismic profiles. In contrast, beds dip an average of ~10° in the cores. This higher apparent dip is the sum of the ~2.5° seaward dip and a measured hole deviation of 7.43°, which must be essentially in the same seaward direction. Using the maximum dip direction in the cores as a reference direction, paleocurrents were measured from 11 current-ripple foresets and 11 vector means of grain fabric in planar-laminated sandstones. Five of the planar-laminated sandstone samples have a grain imbrication 8°, permitting specification of a unique flow direction rather than just the line-of-motion of the current. Both ripples and grain fabric point to unconfined flow toward the north-northeast. There is considerable spread in the data so that some paleoflow indicators point toward the northwest, whereas others point southeast. Nevertheless, the overall pattern of paleoflow suggests a source for the turbidity currents on the southeastern Grand Banks, likely from the long-emergent Avalon Uplift in that area. On average, turbidity currents apparently flowed axially in the young Albian rift, toward the north. This is opposite to what might be expected for a northward-propagating rift and a young ocean opening in a zipperlike fashion from south to north. Other/Unknown Material Newfoundland North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-44.785830,-44.785830,45.405330,45.405330) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
210-1276A DRILL Drilling/drill rig Joides Resolution Leg210 North Atlantic Ocean Ocean Drilling Program ODP |
spellingShingle |
210-1276A DRILL Drilling/drill rig Joides Resolution Leg210 North Atlantic Ocean Ocean Drilling Program ODP Hiscott, Richard N Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments |
topic_facet |
210-1276A DRILL Drilling/drill rig Joides Resolution Leg210 North Atlantic Ocean Ocean Drilling Program ODP |
description |
Albian turbidites and intercalated shales were cored from ~1145 to 1700 meters below seafloor at Site 1276 in the Newfoundland Basin. Strata at this level dip ~2.5° seaward (toward an azimuth of ~130°) based on seismic profiles. In contrast, beds dip an average of ~10° in the cores. This higher apparent dip is the sum of the ~2.5° seaward dip and a measured hole deviation of 7.43°, which must be essentially in the same seaward direction. Using the maximum dip direction in the cores as a reference direction, paleocurrents were measured from 11 current-ripple foresets and 11 vector means of grain fabric in planar-laminated sandstones. Five of the planar-laminated sandstone samples have a grain imbrication 8°, permitting specification of a unique flow direction rather than just the line-of-motion of the current. Both ripples and grain fabric point to unconfined flow toward the north-northeast. There is considerable spread in the data so that some paleoflow indicators point toward the northwest, whereas others point southeast. Nevertheless, the overall pattern of paleoflow suggests a source for the turbidity currents on the southeastern Grand Banks, likely from the long-emergent Avalon Uplift in that area. On average, turbidity currents apparently flowed axially in the young Albian rift, toward the north. This is opposite to what might be expected for a northward-propagating rift and a young ocean opening in a zipperlike fashion from south to north. |
format |
Other/Unknown Material |
author |
Hiscott, Richard N |
author_facet |
Hiscott, Richard N |
author_sort |
Hiscott, Richard N |
title |
Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments |
title_short |
Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments |
title_full |
Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments |
title_fullStr |
Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments |
title_full_unstemmed |
Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments |
title_sort |
ripple migration directions and grain fabric measurements on odp hole 210-1276a sediments |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.776586 https://doi.org/10.1594/PANGAEA.776586 |
op_coverage |
LATITUDE: 45.405330 * LONGITUDE: -44.785830 * DATE/TIME START: 2003-02-09T16:20:00 * DATE/TIME END: 2003-07-16T08:44:00 |
long_lat |
ENVELOPE(-44.785830,-44.785830,45.405330,45.405330) |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_source |
Supplement to: Hiscott, Richard N (2007): Paleoflow directions of Albian basin-floor turbidity currents in the Newfoundland Basin. In: Tucholke, B.E., Sibuet, J.-C., and Klaus, A. (Eds.), Proc. ODP, Sci. Results, 210 : College Station, TX (Ocean Drilling Program), 210, 1-27, https://doi.org/10.2973/odp.proc.sr.210.103.2007 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.776586 https://doi.org/10.1594/PANGAEA.776586 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.77658610.2973/odp.proc.sr.210.103.2007 |
_version_ |
1810458659212230656 |