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Wrack line on a sandy beach adjacent to a sand dune ecosystem. Beach wrack or marine wrack is organic material (e.g. kelp, seagrass, driftwood) and other debris deposited at high tide on beaches and other coastal area. This material acts as a natural input of marine resources into a terrestrial system, providing food and habitat for a variety ...
These flames usually extend into an overlying sandstone layer. This deformation is caused from sand being deposited onto mud, which is less dense. [2] Load casts, technically a subset of sole markings, below, are the features which form alongside flame structures. Flames are thin fingers of mud injected upward into the overlying sands, while ...
Send Kelp! is a Canadian documentary film, directed by Blake McWilliam and released in 2024. [1] The film centres on Frances Ward, a woman who decided to deal with her fears about the world's environmental future by launching a kelp farm on Vancouver Island to contribute to replenishing the Pacific Ocean ecosystem.
Parent material is the underlying geological material (generally bedrock or a superficial or drift deposit) in which soil horizons form. Soils typically inherit a great deal of structure and minerals from their parent material, and, as such, are often classified based upon their contents of consolidated or unconsolidated mineral material that has undergone some degree of physical or chemical ...
Kelp fly is one common name of species of flies in a number of families of "true flies" or Diptera. They generally feed on stranded and rotting seaweed , particularly kelp in the wrack zone . When conditions are suitable they are very numerous and may be ecologically important in the turnover of organic material on the coast. [ 1 ]
Wind moves sand and smaller particles (dust), especially in arid regions where there is little plant cover, depositing it close to [55] or far from the entrainment source. [56] The type and amount of precipitation influence soil formation by affecting the movement of ions and particles through the soil, and aid in the development of different ...
However the bedrock of the larger part of the county is formed by the silty clays and sandy clays of the succeeding Eocene age Harwich Formation which is ascribed to the Thames Group. Isolated patches of later Eocene sand, silt and clay occur in the area between Southend-on-Sea , Chelmsford and London .
Streambeds are what would be left once a stream is no longer in existence. The beds are usually well preserved even if they get buried because the banks and canyons made by the stream are typically hard, although soft sand and debris often fill the bed. Dry, buried streambeds can actually be underground water pockets. [1]