Terrigenous sediment refers to particles that originate from land and are transported to oceans, lakes, and rivers. These sediments are primarily composed of minerals and organic materials that weather and erode from rocks and soil. Common sources include rivers, wind, and glaciers, which carry these materials into water bodies. Once in aquatic environments, terrigenous sediments can settle on the seafloor or lakebed, contributing to the formation of sedimentary layers. They play a crucial role in the geological processes of the Earth, influencing habitats and ecosystems, and are often studied in fields like geology and oceanography.