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1.6. Recent benthonic deposits The recent deposits of the sea bed are mainly represented by loose formations, such as shell-sandy deposits and oozy sediments. At the same time here a regular change of sediments types from shallow to deep depths is observed. Shell-sandy deposits have greater spread in coastal line. According to composition there are shell deposits, shell and quartzy sands. Great of little quantity of shingles, pebbles, rare boulders always mixes with sands in areas of root rocks outcrop. Oozy sediments are mainly represented by sandy oozes, oozes with shells and shell-sandy oozes. Oozes sediments are confined to the lowered areas of the coastal sea bed, zones of weak influence upon bed, they also regularly replace sandy formations in shelf brow and continental slope direction. Sea bed of the central deep water part of the Middle and South Caspian is covered with this oozes. For the last years due to wide development of diatomic algae on the Middle Caspian shelf and Apsheron rapids area the diatomic deposits also developed there. Besides loose formations a cover of recent cementation consisting of cemented pelitomorphic carbonate of shells fragments and sandy grains, rare rounded pebbles and rocks fragments has a wide development in line from Shakh Dili to Alyat cape. This cover thickness is insignificant - from 3-4 to 6-7 cm, but it covers great areas with continuous cover. Lowers of the cover surface relief of the recent cementation are filled with sands of thin thickness and oozy sediments. Reference
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