Littoral Deposits

Littoral Deposits

 

deposits in the littoral zone. They are extremely varied in composition, consisting of boulders, pebbles of varying degrees of roundness, gravel, sand, and silt sediments. A high content of organic remains is often noted. Present-day littoral deposits are found only within a narrow zone. Ancient littoral deposits formed when shorelines moved. During the transgression of the sea the littoral deposits were buried under other types of marine deposits. They are well preserved in sections, occurring on heavily water-eroded surfaces of more ancient rocks or on continental deposits.

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The mystery prompted Koivisto and team - researchers from Sweden, Denmark, and Nordic Maritime Group - to launch an underwater expedition to Kuolimo and hunt Stone Age traces buried at the bottom of the lake or its littoral deposits.
This bryozoanalgal limestone, typically deposited today between 24 |degrees~ N and 30 |degrees~ N, contrasts with the tropical coral-algal calcareous sediment characteristic of the modern Hawaiian sub littoral deposits, under which a hot spot is currently located (at 19.5 |degrees~ N).