Site M0079

McNeill, Lisa C.; Shillington, D. J.; Carter, Gareth; Everest, Jez; Ber, E. Le; Collier, Richard E. Ll.; Cvetkoska, Aleksandra; Gelder, Gino de; Diz, Paula; Doan, Mai‐Linh; Ford, Mary; Gawthorpe, Robert L.; Geraga, Maria; Gillespie, Jack; Hemelsdaël, Romain; Herrero‐Bervera, Emilio; Ismaiel, M.; Janikian, Liliane; Kouli, Katerina; Li, S.; Machlus, M.L.; Maffione, Marco; Mahoney, Carol; Michas, Georgios; Miller, C.; Nixon, Casey W.; Oflaz, Sabire Asli; Omale, Abah P.; Panagiotopoulos, Konstantinos; Pechlivanidou, Sofia; Phillips, Marcie Purkey; Sauer, Simone; Seguin, Joana; Sergiou, Spyros; Zakharova, Natalia

doi:10.14379/iodp.proc.381.105.2019

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…This assemblage also includes other siliceous microfossils, such as radiolarians and silicoflagellates, and abundant calcareous nannofossils. A similar assemblage was observed in Hole M0079A in Subunit 1-16, just above the Unit 1/2 boundary (see Mi-cropaleontology in the Site M0079 chapter [McNeill et al, 2019c]). Further quantitative analysis is required to determine whether these assemblages are correlative.…”

Section: Marine Diatomssupporting

confidence: 68%

Site M0078

McNeill¹,

Shillington²,

Carter³

et al. 2019

Proceedings of the International Ocean Discovery Program

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Section: Marine Diatomssupporting

confidence: 68%

Site M0078

McNeill¹,

Shillington²,

Carter³

et al. 2019

Proceedings of the International Ocean Discovery Program

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“…In Unit 1, a decrease in density occurs in some interpreted marine intervals (e.g., 22.83-35.80, 83.11-89.20, and 130.92-136.96 mbsf ), consistent with observations from Holes M0078A and M0079A ( Figure F30; also see Figure F29 in the Site M0078 chapter and Figure F25 in the Site M0079 chapter [McNeill et al, 2019c[McNeill et al, , 2019d). An increase in density also occurs at approximately 36 mbsf, near the boundary between Subunits 1-3 and 1-4, marking a change in average bulk density from 1.74 g/cm 3 (0-35.80 mbsf ) to 1.81 g/cm 3 (35.80-136.96 mbsf ).…”

Section: Densitysupporting

confidence: 83%

“…Approximately 97% of the bulk density values are greater than 1.7 g/cm 3 (2% less than the average for Hole M0079A), and only about 13% are greater than 2.2 g/cm 3 (11% higher than Hole M0079A). Bulk density increases with depth with some relatively sharp increases in density compared with Holes M0078A and M0079A (Figure F30; also see Figure F29 in the Site M0078 chapter and Figure F25 in the Site M0079 chapter [McNeill et al, 2019c[McNeill et al, , 2019d). Notable changes in bulk density correlate with the four major lithostratigraphic unit boundaries; however, density variations also occur within each lithostratigraphic unit ( Figure F30).…”

Section: Densitymentioning

confidence: 91%

Site M0080

McNeill¹,

Shillington²,

Carter³

et al. 2019

Proceedings of the International Ocean Discovery Program

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This work is distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Contents 1 Operations 5 Lithostratigraphy 16 Structural geology 20 Micropaleontology 25 Geochemistry 30 Physical properties 37 Paleomagnetism 41 Downhole measurements 45 Core-log-seismic integration 51 References Operations During International Ocean Discovery Program (IODP) Expedition 381, cores were recovered from one hole at Site M0080 (Figures F1, F2). Drilling and coring in Hole M0080A was completed to 534.1 meters below seafloor (mbsf) in 13 days, achieving an average core recovery of 84% (see Table T1 for details). The Fugro Corer in both push and percussive modes was used to collect the upper 141 m of sediment. The Fugro Extended Marine Core Barrel (FXMCB) was used to complete the lower 393 m of the borehole. Wireline logging operations were then conducted over 2 days.

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Deep-Water Syn-rift Stratigraphy as Archives of Early-Mid Pleistocene Palaeoenvironmental Signals and Controls on Sediment Delivery

et al. 2021

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The timing and character of coarse siliciclastic sediment delivered to deep-water environments in active rift basins is governed by the complicated interactions of tectonics, climate, eustasy, hinterland geology, and shelf process regime. The stratigraphic archives of deep-water syn-rift basin-fills provide records of palaeoenvironmental changes (e.g. climate and vegetation) in onshore catchments, particularly where they are connected by narrow shelves. However, a chronostratigraphically constrained record of climatic fluctuations and process responses in the hinterland source area recorded in deep-water deposits is rare. Here, we integrate a fully cored research borehole with outcrop exposures of deep-water syn-rift stratigraphy to reconstruct palaeoenvironmental change within the stratigraphy of the West Xylokastro Fault Block in the Corinth Rift, Greece. We used palaeomagnetic and palynological analyses from borehole core samples to develop a chronostratigraphic and palaeoenvironmental model, which we compare to global records of Early-Mid Pleistocene climate and eustatic change. This framework allows establishment of a chronostratigraphic and palaeoenvironmental context to stratigraphic variability encountered in outcrop and in the borehole. Our results show that the ∼240 m thick studied succession was deposited from ∼1.1 to 0.6 Ma across the Early-to Mid-Pleistocene transition. During the Early Pleistocene, obliquity-paced climatic variability is largely coherent with vegetation changes of forest coverage within catchments on the southern margin of the Corinth Rift. Large magnitude, eccentricity-paced cyclicity dominant after the Mid-Pleistocene Transition can alter sediment supply from onshore catchments during the warming stages of severe interglacials where expansion of forest cover may trap sediment within catchments. Conglomeratic grade sediment delivery to the deep-water is enhanced during glacial periods, interpreted to reflect sparse forest cover and large winter storms, and during semi-arid, grassland-dominated interglacial highstands during severe interglacials. Base-level rise during minor interglacials is easily outpaced by high sediment supply and is seldom represented stratigraphically. The study demonstrates the value of integrated palynological and sedimentological studies, whilst applying a conservative approach to interpretation when dealing with sparse palynological records from proximal deep-water stratigraphy. The case study provides conceptual models where climatic and vegetation changes can begin to be incorporated as a key control on sediment flux from onshore drainage basins to deep-water syn-rift successions.

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Site M0079

Cited by 3 publications

References 35 publications

Site M0078

Site M0078

Site M0080

Deep-Water Syn-rift Stratigraphy as Archives of Early-Mid Pleistocene Palaeoenvironmental Signals and Controls on Sediment Delivery

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