Inner shelf seismic stratigraphy off the north coast of Northern Ireland: new data on the depth of the Holocene lowstand

Andrew Cooper, JT Kelley, DF Belknap, R Quinn, J McKenna

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

New seismic stratigraphic data are presented from the inner shelf off the north coast of Northern Ireland. The sequence preserved comprises an acoustic basement of till or solid bedrock, overlain by a fine-grained, acoustically transparent unit interpreted as glacio-marine sediment. This is overlain by an upper, reflective sandy unit which contains a discontinuous but widespread internal reflector, interpreted as peat that developed during a late glacial/Holocene relative sea-level fall and continued to accumulate until; subsequent inundation. The depth of the Holocene lowstand is estimated at -30 in MSL on the basis of the seaward extent of the sandy unit and its intercalated peaty horizons, the presence of erosional notches and a widespread break in slope at this depth. The lowstand is not definitively dated but on the basis of dated deposits in adjacent locations is inferred to have occurred between 10 000 and 11000 14C yr BP. (C) 2002 Elsevier Science B.V. All rights reserved.
LanguageEnglish
Pages369-387
JournalMarine Geology
Volume186
Issue number3-4
Early online date30 May 2002
DOIs
Publication statusPublished - 10 Jul 2002

Fingerprint

seismic stratigraphy
lowstand
Holocene
coast
late glacial
marine sediment
peat
bedrock
acoustics
sea level

Cite this

@article{961ca97b7cba4c4d8fe36aaafb0b9a66,
title = "Inner shelf seismic stratigraphy off the north coast of Northern Ireland: new data on the depth of the Holocene lowstand",
abstract = "New seismic stratigraphic data are presented from the inner shelf off the north coast of Northern Ireland. The sequence preserved comprises an acoustic basement of till or solid bedrock, overlain by a fine-grained, acoustically transparent unit interpreted as glacio-marine sediment. This is overlain by an upper, reflective sandy unit which contains a discontinuous but widespread internal reflector, interpreted as peat that developed during a late glacial/Holocene relative sea-level fall and continued to accumulate until; subsequent inundation. The depth of the Holocene lowstand is estimated at -30 in MSL on the basis of the seaward extent of the sandy unit and its intercalated peaty horizons, the presence of erosional notches and a widespread break in slope at this depth. The lowstand is not definitively dated but on the basis of dated deposits in adjacent locations is inferred to have occurred between 10 000 and 11000 14C yr BP. (C) 2002 Elsevier Science B.V. All rights reserved.",
author = "Andrew Cooper and JT Kelley and DF Belknap and R Quinn and J McKenna",
year = "2002",
month = "7",
day = "10",
doi = "10.1016/S0025-3227(02)00311-0",
language = "English",
volume = "186",
pages = "369--387",
journal = "Marine Geology",
issn = "0025-3227",
publisher = "Elsevier",
number = "3-4",

}

Inner shelf seismic stratigraphy off the north coast of Northern Ireland: new data on the depth of the Holocene lowstand. / Cooper, Andrew; Kelley, JT; Belknap, DF; Quinn, R; McKenna, J.

In: Marine Geology, Vol. 186, No. 3-4, 10.07.2002, p. 369-387.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Inner shelf seismic stratigraphy off the north coast of Northern Ireland: new data on the depth of the Holocene lowstand

AU - Cooper, Andrew

AU - Kelley, JT

AU - Belknap, DF

AU - Quinn, R

AU - McKenna, J

PY - 2002/7/10

Y1 - 2002/7/10

N2 - New seismic stratigraphic data are presented from the inner shelf off the north coast of Northern Ireland. The sequence preserved comprises an acoustic basement of till or solid bedrock, overlain by a fine-grained, acoustically transparent unit interpreted as glacio-marine sediment. This is overlain by an upper, reflective sandy unit which contains a discontinuous but widespread internal reflector, interpreted as peat that developed during a late glacial/Holocene relative sea-level fall and continued to accumulate until; subsequent inundation. The depth of the Holocene lowstand is estimated at -30 in MSL on the basis of the seaward extent of the sandy unit and its intercalated peaty horizons, the presence of erosional notches and a widespread break in slope at this depth. The lowstand is not definitively dated but on the basis of dated deposits in adjacent locations is inferred to have occurred between 10 000 and 11000 14C yr BP. (C) 2002 Elsevier Science B.V. All rights reserved.

AB - New seismic stratigraphic data are presented from the inner shelf off the north coast of Northern Ireland. The sequence preserved comprises an acoustic basement of till or solid bedrock, overlain by a fine-grained, acoustically transparent unit interpreted as glacio-marine sediment. This is overlain by an upper, reflective sandy unit which contains a discontinuous but widespread internal reflector, interpreted as peat that developed during a late glacial/Holocene relative sea-level fall and continued to accumulate until; subsequent inundation. The depth of the Holocene lowstand is estimated at -30 in MSL on the basis of the seaward extent of the sandy unit and its intercalated peaty horizons, the presence of erosional notches and a widespread break in slope at this depth. The lowstand is not definitively dated but on the basis of dated deposits in adjacent locations is inferred to have occurred between 10 000 and 11000 14C yr BP. (C) 2002 Elsevier Science B.V. All rights reserved.

U2 - 10.1016/S0025-3227(02)00311-0

DO - 10.1016/S0025-3227(02)00311-0

M3 - Article

VL - 186

SP - 369

EP - 387

JO - Marine Geology

T2 - Marine Geology

JF - Marine Geology

SN - 0025-3227

IS - 3-4

ER -