These are mostly stratiform deposits in alternating dolomitic and terrigenous formations. Paleozoic and upper Proterozoic carbonates and terrigenous sediments. A basin developed and was filled with land-based, or "terrigenous", sediments. The flood plain was found to have distributary channels of sand and terrigenous material. A basin developed and was filled with land-based, or terrigenous, sediments. Other sources of terrigenous sediment may include airborne and seaborne volcanoclastic debris. Sediments at the bottom of the ocean have two main origins, terrigenous and biogenous. The terrigenous and biogenic material compounds together to form sandy muds with sparse clasts. Nonvolcanic material may consist of terrigenous, chemical precipitates or organogenic components. Terrigenous material includes minerals from the lithosphere like feldspar or quartz. The oceanic basins adjacent to the continental slopes mostly contain terrigenous sediments. Terrigenous sediments are responsible for a significant amount of the salt in today's oceans. Terrigenous sediment is the most abundant sediment found on the seafloor, followed by biogenous sediment.