Eco-biostratigraphic advances in late Quaternary geochronology and palaeoclimate: the marginal Gulf of Mexico analogue

Abstract

As so ci ate ed i tor: Wojciech Granoszewski This study com bines high-res o lu tion plank tonic foraminiferal eco-biostratigraphy and palaeoclimatic data from the high-sed imen ta tion-rate core JPC-26 from the north west ern mar gin of the Gulf of Mex ico (GoM). The eco-biozones rec og nized (GOMPFE1-12) be ing cor re lated with pub lished Mg/Ca-based sea sur face tem per a tures. This up dated palaeoclimatic and strati graphic ref er ence re cord fa cil i tates cor re la tions with the Green land ice core events and their cli ma tic re la tion ships, and also pro vides a solid strati graphic frame work for cor re la tions with other palaeoclimatic and palaeoceanographic re cords in the circum-GOM/Ca rib bean re gion. This multidisciplinary ap proach un der lines the util ity of sup port ing con ven tional dat ing meth od ol o gies with dif fer ent con straints, and fur ther re veals a pow er ful tool for re li ably cor re lat ing ma rine re cords be tween com pa ra ble deep-sea mar ginal set tings and co eval se quences of this re gion. Key words: in te grated stra tig ra phy, Late Glacial-Holocene tran si tion, plank tonic foraminiferal eco-bioevents, deep-sea sed imen tary cor re la tions, cli mate vari abil ity, palaeoceanography.

High resolution paleo-environmental changes during the Sapropel 1 in the North Ionian Sea, central Mediterranean

“…The Mediterranean is a semi-enclosed Sea divided by two main basins, the western and eastern Mediterranean, separated by the Sicily channel (Figure 1). Its reduced spatial scale, partial isolation and marginal configuration make the Mediterranean Sea an excellent “natural laboratory” acting as an amplifier, where climatic and oceanographic processes can be studied with a better signal to noise ratio compared to the open ocean (Antonarakou et al, 2019; Cacho et al, 2001; Kontakiotis, 2016; Rohling et al, 2015). The Mediterranean Sea sediments have proved to be an excellent archive where climatic events can be recorded (i.e.…”

Multiproxy ecosystem response of abrupt Holocene climatic changes in the northeastern Mediterranean sedimentary archive and hydrologic regime

“…As an example, the relatively small volume of the Mediterranean Sea causes changes in its climatic forcing to be recorded virtually instantaneously in paleoceanographic proxy data, such as stable isotope and other geochemical ratios, and in microfossil abundances. Specifically, the signals registered by changes in abundance and distribution of fossil microorganisms, such as planktonic foraminifera, provide a reliable and well-documented record at both global and local scales (Cacho et al, 2001; Siani et al, 2010, 2013; Lirer et al, 2014; Antonarakou et al, 2015, 2019; Bonfardeci et al, 2018). The basin's limited communication with the open ocean implies that any climatic signals will be recorded in an amplified fashion in Mediterranean properties, such as temperature, salinity, and specific elemental concentrations (Casford et al, 2002; Marino et al, 2009; Kontakiotis, 2016; Louvari et al, 2019).…”

An Improved Cleaning Protocol for Foraminiferal Calcite from Unconsolidated Core Sediments: HyPerCal—A New Practice for Micropaleontological and Paleoclimatic Proxies

“…The tests of different foraminifera species can provide environmental information by means of both physical and chemical analyses. Despite the main focus for environmental reconstructions based on stable isotope [2,3] and trace metal geochemistry [4][5][6] of foraminifera tests a wealth of information can be attained by their physical analyses that include the study of shell fragmentation [7], abundancies for ecological [8] or biostratigraphic purposes [9] and shell biometry [10][11][12] including size [13,14] and weight [15,16].…”