Seismic stratigraphy of Late Quaternary deposits from the southwestern Black Sea shelf: evidence for non-catastrophic variations in sea-level during the last ∼10 000 yr

摘要: Abstract Detailed interpretation of single channel seismic reflection and Huntec deep-tow boomer sparker profiles demonstrates that the southwestern Black Sea shelf formed by a protracted shelf-edge progradation since Miocene–Pliocene. Five seismic–stratigraphic units are recognized. Unit 1 represents last phase progradational history, was deposited during glacial lowstand Holocene. It is divided into four subunits: Subunit 1A interpreted as systems tract, 1B 1C transgressive 1D highstand tract. The tract deposits consist overlapping seaward-prograding wedges subsequent initial rise sea level. These best developed along westernmost easternmost segments study area, off mouths rivers. set shingled, shore-parallel, back-stepping parasequences, relatively rapid sea-level rise, include number prograded sediment bodies (including barrier islands, beach deposits) thin veneers seismically transparent muds showing onlap onto flanks older sedimentary features. A radiocarbon dates from gravity cores show architecture contain detailed record for post-glacial shelf. data do not support catastrophic refilling waters Mediterranean at 7.1 ka postulated [Ryan, Pitman, Major, Shimkus, Maskalenko, Jones, Dimitrov, Gorur, Sakinc, Yuce, Mar. Geol. 138 (1997) 119–126], Touchstone Book (1999) 319 pp.], [Ballard, Coleman, Rosenberg, 170 (2000) 253–261].