There are many different kinds of wetlands and many ways to categorize them. NOAA classifies wetlands into five general types: marine (ocean), estuarine (estuary), riverine (river), lacustrine (lake), ...

This geodetic mark in Louisiana is anchored deep below the ground and was level with the ground when it was originally placed there, but now the ground around the mark has subsided. Subsidence - ...

A map that shows where spilled oil is likely to travel and which shorelines and other environmentally or culturally sensitive areas might be at risk. VIDEO: Predicting where oil may go in the water is ...

People often think that the underwater world is silent. In fact, numerous marine organisms use sound for communication, reproduction, and to seek prey. The hydrophone pictured here is located within ...

The international date line, shown here as a yellow line, defines the boundary between calendar dates. The international date line, established in 1884, passes through the mid-Pacific Ocean and ...

White Shoal Lighthouse in northern Lake Michigan. Have you ever wondered how fish survive in cold winter weather, or where they go when lakes and ponds freeze over? Like many people, fish tend to be ...

Several thousand marine scientists are busy at work in the United States dealing with a diversity of important issues — from climate change, declining fisheries, and eroding coastlines, to the ...

The saltiness of the ocean is the result of several natural influences and processes; water from rivers entering the ocean is just one of these factors. Braided river delta at low tide Lower Cook ...

Pocosins are generally found along the Atlantic coastal plain of the United States, from southern Virginia to northern Florida. These areas typically occur in broad, low-lying shallow basins that do ...

Beaufort Sea, north of Alaska. One part of the cryosphere is ice that is found in water. This includes frozen parts of the ocean, such as waters surrounding Antarctica and the Arctic. There are places ...

Salt marsh within Narragansett Bay National Estuarine Research Reserve. Salt marshes are coastal wetlands which are flooded and drained by tides. Salt marshes are coastal wetlands that are flooded and ...

The National Spatial Reference System (NSRS) is a consistent coordinate system that defines latitude, longitude, height, scale, gravity, and orientation throughout the United States NOAA's National ...