Freshwater Formations
Partially enclosed body of water where freshwater meets saltwater
Estuary
Rich silt deposited at the mouth of river
Delta
A narrow, steep-sided valley between mountains
gorge
a place where (usually a big pit) Earth material is removed from the ground
Quarry
Molten rock expelled from a volcano
lava
Periodic eruption of steam and water from a spring
geyser
A group of islands
Archipelago
land bordered by water on three sides but connected to the mainland by the remaining side
Peninsula
a lowland region formed by the separation of tectonic plates, creating a linear valley
Rift Valley
A large headland extending into a body of water
Cape
a small source of fresh water in a desert
Oasis
A portion of submerged continent under shallow water
Continental Shelf
An extensive area of flat land
Plain
an isolated, steep-sided hill with a small, flat top, formed by erosion.
Butte
A narrow waterway that connects two bodies of water
Strait
A hole in the ground caused by removal of ground water
Sinkhole
Underwater mountain range formed by plate-tectonic spreading
Mid-Ocean ridge
Flat land next to riverbanks that perodically floods
floodplain
an indentation caused by the force of an outer space object
Impact crater
All precipitation that falls in a given geographic region
watershed
meeting of two rivers at one point
Confluence
A small river that flows into a larger river
Tributary
Narrow strip of land connecting two larger land areas
Isthmus
a large, cauldron-like hollow or depression, often miles wide, formed when a volcano collapses into its own emptied magma chamber
Caldera
When meaders become so bent they actually cut lthemselves off of the stream and form "lakes"
Oxbow Lake