Морфо-литогенетични и морфоструктури особености на българския черноморски шелф

П. Димитров, Д. Пърличев, Т. Кръстев. Морфо-литогенетични и морфоструктури особености на българския черноморски шелф

P. Dimitrov, D. Parlichev, T. Krastev. Morpholithogenetic and morphostructural pequliarities of the Bulgarian Black Sea Shelf

---

MORPHOLITHOGENETIC AND MORPHOSTRUCTURAL PECULIARITIES OF THE BULGARIAN BLACK SEA SHELF

P. Dimitrov, D. Parlichev, T. Krastev

(Summary)

Recently the morpholithogenetic and morphostructural investigations of the shelf zone have given us a new knowledge about the processes of relief and sediment formation during Pleistocene and Holocene. On the basis of numerous data, the basic morpholithogenetic zones have been distinguished. Shelf morphostructural studies are still at their beginning but nevertheless, they are very important to clarify the relationship between the deep earth crust structure and adolescent structural features.

The irregular sea level changes (120/110—0 m) in the Upper Pleistocene and Holocene have caused different combinations of physical - oceanological factors. Thus, a few parallel to the coast zones, being morpholithological formations in nature, have originated. They mark the sea level, kept relatively constant during certain geological periods. The so called shelf marginal district' embracing several zones (of the sunk lagoon, marginal swells and deep-water terrace) are of great interest. The marginal swells are ancient coastal formations which have inherited the old pre-Neweuqscene ones, the origin of which was a result of max sea regression (80—100 m) in the times past.

Morpholithogenetic processes are dependent on different in genesis and age structures which have behaved in various ways during the Quaternary. Due to them, `embryonic’ positive and negative morphostructures have been established either directly (by delevelling of the sea bottom relief) or indirectly (by geomorphological anomalies against the background of constant influence of hydrogenic factors).

---

Към съдържанието на статията/ Access to the full text of the article