It is not really an island, but the area between a current and ancient channel of the Wailuku River.

After the glacier melted, the Illinois River flowed into the ancient channel.

The river is believed to have been an ancient channel of the Colorado.

The marsh utilizes an ancient, perhaps once abandoned, river channel that discharges into Upper Newport Bay.

The ancient channel through the moraine includes not only the land between those modern lakes, but the lakes themselves.

He could now sufficiently examine on this side the ancient channels of the lava.

She grabbed Icebones's tusks and began to drag her along the bed of the ancient channel.

Much of it was draining away through the ancient channels to the Ocean of the North.

She stood at the head of an ancient water-carved channel.

The mega-bonebed's host stratum ends in the south where deposits were left by an ancient channel that had eroded through the bed.