resaca
A dry river bed, a former channel of the Rio Grande, found in the southern half of Cameron County, Texas and deep into northeastern portions of the State of Tamaulipas, Mexico.
The road lay over dark resacas and running streams, where volcanic rocks rose above each other^([sic]), and every detour might have been made a fortress.
A small body of water.
Where it comes from
From Spanish resaca, probably from resacar (“retake”), though possibly from rio seco (“dry river”) instead.
Adapted from the Wiktionary entry resaca (CC BY-SA 4.0).