Marine sediments are particles that settle at the bottom of oceans and seas. They can be made up of various materials, including tiny bits of rock, minerals, and organic matter from dead plants and animals. These sediments accumulate over time, forming layers that can provide valuable information about Earth's history and climate changes. There are different types of marine sediments, such as terrigenous sediments, which come from land, and biogenic sediments, which originate from marine organisms like plankton. Understanding marine sediments helps scientists study ocean ecosystems and the processes that shape our planet.