Seismic stratigraphy of the southeastern Black Sea shelf from high-resolution seismic records

摘要: Abstract High-resolution seismic reflection profiles obtained from the shelves off Samsun and Trabzon coasts (southeastern Black Sea) have revealed existence of two distinct reflectors (R T). Reflector R forms boundary between upper depositional sequence A lower B. Seismo-stratigraphically, is characterized by stratified (simple, complex lenticular) configurations which imply changing systems and/or conditions, changes source supply sediments due to relative change sea level. Additionally, observed onlapping pattern within this denotes rising level during last post-Glacial transgression. The mounded facies beyond steep gradients on shelf area slump masses. B commonly chaotic are interpreted either as strata deposited in a variable, relatively high energy setting, or initially continous that been deformed. presence some parallel-subparallel reflections its character. (reflector R) reflects pre-Holocene unconformity, probably caused falling at time Last Glacial Maximum. toplap termination indicates stillstand 91 m depth Based borehole data, composed consolidated sand gravel admixtures area, basalt-agglomerate-tuff series area. T zone anomalous (acoustic turbidity, AT) represent gas A. accumulations tend occur “blanket” “curtain” depending their appearances records.