Sediments fall into two main types: those that have been washed or blown into the ocean from the continents and those that are organic in nature and have been produced from the remains of skeletons of algae and small animals. The first type is called TERRIGENOUS s and consists of gravels, sands and silts. These terrigenous sediments are mostly carried by water down rivers but some have blown into the ocean
Terrigenous (also called detrital or clastic)
Terrigenous sedimentary rocks are derived from the weathering of pre-existing rocks, whch have been transported to the depositional basin.
They have a clastic (broken or fragmental) texture consisting of:
Clasts (larger pieces, such as sand or gravel)
Matrix (mud or fine-grained sediment surrounding the clasts)
Cement (the glue that holds it all together), such as:
Source: EXTRACTED FROM OCEANOGRAPHY RELATED WEBSITES