sand bar

a bar of sand formed in a river or sea by the action of tides or currents.

Origin of sand bar

First recorded in 1760–70

I'll have a chance to practice this summer, getting the boat off a sand-bar!

The Outdoor Girls at Ocean View |Laura Lee Hope
And the lynx, with ears laid back, watched Kazan and Gray Wolf as they began the invasion of the sand-bar.

Kazan |James Oliver Curwood
"The first thing to do is to get out an anchor before we drift down on a sand-bar," said Mr. Chillingworth.

The Bungalow Boys Along the Yukon |Dexter J. Forrester
Just before dinner we stopped to cut drift-wood on a sand-bar, and a Wolf was seen upon it.

Audubon and his Journals, Volume I (of 2) |Maria R. Audubon

The last they saw of him he was trying to climb out on a sand-bar.

Down the Yellowstone |Lewis R. Freeman

sand bar

a ridge of sand in a river or sea, built up by the action of tides, currents, etc, and often exposed at low tide