TY - JOUR
T1 - Reply to comment on, "Compilation of geophysical, geochronological, and geochemical evidence indicates a rapid Mediterranean-derived submergence of the Black Sea's shelf and subsequent substantial salinification in the early Holocene" by AG Yanchilina, WBF Ryan, JF McManus, P. Dimitrov, D. Dimitrov, K. Slavova, M. Filipova-Marinova [Marine Geology 383 (2017) 14-34]
AU - Yanchilina, Anastasia G.
AU - Ryan, William B. F.
AU - McManus, Jerry F.
AU - Dimitrov, Petko
AU - Dimitrov, Dimitar
AU - Slavova, Krasimira
AU - Filipova-Marinova, Mariana
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/1
Y1 - 2019/1
N2 - Soulet (2018) asserts that the calculation of the 14C reservoir age for the geochronology of the Black Sea sediments suffers from a fundamental flaw. He contends that Yanchilina et al. (2017) obtained reservoir ages by first sorting the delta O-18 and delta C-13 values of the mollusks as a function of their corresponding C-14 age before aligning the mollusk isotope curves to those of the nearby Sofular Cave. Sorting by C-14 age would lead to an incorrect calendar age for each delta O-18 and delta C-13 measurement because it does not take into account changing reservoir ages. We reply here that this sorting by C-14 age was not the procedure taken. The radiocarbon reservoir ages were derived after tuning the delta O-18 and delta C-13 composition of the mollusks, sorted by their 8180, 813C, radiocarbon age and stratigraphic location in each core, to the delta O-18 and delta C-13 composition of the U/Th dated Sofular Cave stalagmites as a function of calendar age, shown to reflect Black Sea surface water delta O-18 and delta C-13 composition.After the calendar age was derived for each mollusk, it was then converted to a corresponding Northern Hemisphere atmospheric C-14 age using Reimer et al. (2009). The C-14 reservoir age was subsequently calculated from the difference between the measured C-14 age of the mollusks and the calculated Northern Hemisphere atmospheric C-14 age of the mollusks, R(t) = 14C(shell)(t) - 14C(atm) (t) (e.g., Ryan, 2007; Kwiecien et al., 2009; Jull et al., 2013; Philippsen, 2013; Soulet, 2015; Soulet et al., 2016). The Reimer et al. (2009) calibration used in our original study differs <0.5% from the Reimer et al. (2013) calibration.
AB - Soulet (2018) asserts that the calculation of the 14C reservoir age for the geochronology of the Black Sea sediments suffers from a fundamental flaw. He contends that Yanchilina et al. (2017) obtained reservoir ages by first sorting the delta O-18 and delta C-13 values of the mollusks as a function of their corresponding C-14 age before aligning the mollusk isotope curves to those of the nearby Sofular Cave. Sorting by C-14 age would lead to an incorrect calendar age for each delta O-18 and delta C-13 measurement because it does not take into account changing reservoir ages. We reply here that this sorting by C-14 age was not the procedure taken. The radiocarbon reservoir ages were derived after tuning the delta O-18 and delta C-13 composition of the mollusks, sorted by their 8180, 813C, radiocarbon age and stratigraphic location in each core, to the delta O-18 and delta C-13 composition of the U/Th dated Sofular Cave stalagmites as a function of calendar age, shown to reflect Black Sea surface water delta O-18 and delta C-13 composition.After the calendar age was derived for each mollusk, it was then converted to a corresponding Northern Hemisphere atmospheric C-14 age using Reimer et al. (2009). The C-14 reservoir age was subsequently calculated from the difference between the measured C-14 age of the mollusks and the calculated Northern Hemisphere atmospheric C-14 age of the mollusks, R(t) = 14C(shell)(t) - 14C(atm) (t) (e.g., Ryan, 2007; Kwiecien et al., 2009; Jull et al., 2013; Philippsen, 2013; Soulet, 2015; Soulet et al., 2016). The Reimer et al. (2009) calibration used in our original study differs <0.5% from the Reimer et al. (2013) calibration.
UR - https://www.scopus.com/pages/publications/85058118599
U2 - 10.1016/j.margeo.2018.11.006
DO - 10.1016/j.margeo.2018.11.006
M3 - Editorial
SN - 0025-3227
VL - 407
SP - 354
EP - 361
JO - Marine Geology
JF - Marine Geology
ER -