Pelagic Sediment: A ocean sediment that accumulates far enough from land that detrital materials are a minor component. These sediments are largely composed of the tiny shell debris of radiolarians and foraminifera.

 

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Pelagic Sediment: A ocean sediment that accumulates far enough from land that detrital materials are a minor component. These sediments are largely composed of the tiny shell debris of radiolarians and foraminifera.

Sedimentary Structure: A structure in a sedimentary rock that forms at or near the time of deposition and reveals information about the depositional environment. Examples include: ripple marks, cross-bedding, mud . . . View Full Definition

Sedimentary Rock: Any rock composed of sediment, i.e., solid particles and dissolved minerals. Examples include rocks that form from sand or mud in riverbeds or on the sea bottom.

Sediment: Loose aggregate of solids derived from preexisting rocks, or solids precipitated from solution by inorganic chemical processes or extracted from solution by organisms.

Sedimentation: Separation of a dense material (usually a solid) from a less dense material (usually a liquid) by allowing the denser material to settle out of the mixture.

Sediments: Particulate material, including soil, sand, and minerals, transported and deposited by water or wind (see erosion). Waterborne sediments cloud the water diminishing sunlight available to aqu . . . View Full Definition

Terrigenous Sediment: Sediment that is derived from the weathering of rocks which are exposed above sea level.

Terrestrial Sediment: A deposit of sediment that accumulated above sea level in lakes, alluvial fans, floodplains, moraines, etc., regardless of its present elevation.

Sorting (Of A Sediment): The range of scatter of particle sizes about the median grain size of a sediment

Pelagic Zone: One of the two basic subdivisions of the marine biome; consists of the water above the sea fioor and its organisms.