Marine sediments are particles that settle on the ocean floor. They can come from various sources, including land erosion, biological activity, and volcanic eruptions. These sediments can be made up of minerals, organic matter, and tiny shells from marine organisms. Over time, they accumulate and can form layers that provide valuable information about Earth's history. The study of marine sediments helps scientists understand past climates, ocean currents, and the evolution of marine life. By analyzing these sediments, researchers can learn about events like glacial periods and mass extinctions. This information is crucial for understanding current environmental changes and predicting future trends.