NOAA
Noaa: Estuaries 101 Curriculum: Observing Estuaries:
Students investigate landforms and features associated with estuaries by taking a journey down a river to an estuary system where the river empties into the Gulf of Mexico near Weeks Bay. They will use Google Maps and other resources to...
PBS
Pbs: Sandy Coasts
In this interactive resource adapted from the National Park Service, learn about beaches, spits, and other sandy landforms that characterize some of America's coastal national parks.
US Navy
Habitats: Beaches Characteristics
This resource presents an overview of beach structure. This article briefly covers beach features such as spits, tombolos and barrier islands.