Which term describes sediment derived from land sources?

• A. Terrigenous Sediment
• B. Silt
• C. Stratigraphy
• D. Aphotic Zone

Answer: (A)

Sediment classification by source focuses on where the material originates. Terrigenous sediment describes material that comes from land, produced by weathering of rocks on continents and carried to the ocean by rivers, wind, or glaciers. This origin from land makes it the best term for sediment derived from land sources. Silt is about particle size, not provenance, stratigraphy is the study of rock layers, and the aphotic zone is simply a depth where light doesn’t reach, unrelated to where sediment comes from.