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Tephrochronology of core PRAD 1-2 from the Adriatic Sea: insights into Italian explosive volcanism for the period 200-80ka

Tephrochronology of core PRAD 1-2 from the Adriatic Sea: insights into Italian explosive volcanism for the period 200-80ka
Tephrochronology of core PRAD 1-2 from the Adriatic Sea: insights into Italian explosive volcanism for the period 200-80ka
Core PRAD 1-2, located on the western flank of the Mid-Adriatic Deep, was investigated for tephra content within the part of the sequence assigned on biostratigraphic and sapropel-layer stratigraphy to MIS 5 and 6 (ca. 80–200 ka BP). A total of 11 discrete tephra layers are identified, 8 visible and 3 cryptotephra layers. 235 geochemical measurements obtained from individual glass shards using WDS-EPMA enabled 8 of the 11 tephras to be correlated to known eruption events, 5 of which are represented in the Lago Grande di Monticchio (LGdM) regional tephra archive sequence. Three of these layers are recognised ultra-distally for the first time, extending their known distributions approximately 210 km further north. The results provide an independent basis for establishing an age-depth profile for the MIS 5–6 interval in the PRAD 1-2 marine record. This approach allowed age estimates to be interpolated for the tephra layers that could not be correlated to known events. It also provides an independent test of, and support for, the broad synchroneity of sapropel-equivalent (S-E) events in the Adriatic Sea with the better-developed sapropel layers of the eastern Mediterranean, proposed by Piva et al. (2008a).
0277-3791
28-43
Bourne, Anna
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Albert, Paul
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Matthews, Ian
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Trincardi, Fabio
d2e18f00-bf92-4c90-a175-a7d0bc0e3d38
Wulf, Sabine
12412e3e-c09c-44d2-a5c8-286478f5dbdf
Asioli, Alessandra
439e7a75-b674-4748-8451-e0d6864203a0
Blockley, Simon
b14c3dcd-7376-4251-ae5f-b40acf677cec
Keller, Jorg
d1e0425f-c564-4ba5-89a1-0a98bee029b7
Lowe, John
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Bourne, Anna
ca184ead-1dc3-4b0f-8a01-cb427838d996
Albert, Paul
8a08e1c2-2377-4223-92b8-25f283dec5f1
Matthews, Ian
3cc6e23b-692f-4153-b67a-db41dde454cb
Trincardi, Fabio
d2e18f00-bf92-4c90-a175-a7d0bc0e3d38
Wulf, Sabine
12412e3e-c09c-44d2-a5c8-286478f5dbdf
Asioli, Alessandra
439e7a75-b674-4748-8451-e0d6864203a0
Blockley, Simon
b14c3dcd-7376-4251-ae5f-b40acf677cec
Keller, Jorg
d1e0425f-c564-4ba5-89a1-0a98bee029b7
Lowe, John
2165f2a6-960b-4753-a4e7-929d7a712cf0

Bourne, Anna, Albert, Paul and Matthews, Ian et al. (2015) Tephrochronology of core PRAD 1-2 from the Adriatic Sea: insights into Italian explosive volcanism for the period 200-80ka. Quaternary Science Reviews, 116, 28-43. (doi:10.1016/j.quascirev.2015.03.006).

Record type: Article

Abstract

Core PRAD 1-2, located on the western flank of the Mid-Adriatic Deep, was investigated for tephra content within the part of the sequence assigned on biostratigraphic and sapropel-layer stratigraphy to MIS 5 and 6 (ca. 80–200 ka BP). A total of 11 discrete tephra layers are identified, 8 visible and 3 cryptotephra layers. 235 geochemical measurements obtained from individual glass shards using WDS-EPMA enabled 8 of the 11 tephras to be correlated to known eruption events, 5 of which are represented in the Lago Grande di Monticchio (LGdM) regional tephra archive sequence. Three of these layers are recognised ultra-distally for the first time, extending their known distributions approximately 210 km further north. The results provide an independent basis for establishing an age-depth profile for the MIS 5–6 interval in the PRAD 1-2 marine record. This approach allowed age estimates to be interpolated for the tephra layers that could not be correlated to known events. It also provides an independent test of, and support for, the broad synchroneity of sapropel-equivalent (S-E) events in the Adriatic Sea with the better-developed sapropel layers of the eastern Mediterranean, proposed by Piva et al. (2008a).

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Accepted/In Press date: 12 March 2015
e-pub ahead of print date: 9 April 2015
Published date: 15 May 2015
Organisations: Palaeoenvironment Laboratory (PLUS)

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Local EPrints ID: 405021
URI: http://eprints.soton.ac.uk/id/eprint/405021
ISSN: 0277-3791
PURE UUID: 26ef978e-cda5-4403-8646-e117f0aa93fa
ORCID for Anna Bourne: ORCID iD orcid.org/0000-0003-1506-6160

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Date deposited: 26 Jan 2017 09:43
Last modified: 09 Dec 2019 19:17

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Contributors

Author: Anna Bourne ORCID iD
Author: Paul Albert
Author: Ian Matthews
Author: Fabio Trincardi
Author: Sabine Wulf
Author: Alessandra Asioli
Author: Simon Blockley
Author: Jorg Keller
Author: John Lowe

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