carse

1. (Scotland) Low, fertile land; a river valley.Examples: "In the Carse of Gowrie to all the flat land , which is a great proportion of the district , is a deep rich clay"; "[…] and the parish of St. Madois, now in the carse of Gowrie, is said to have been once on the southern side of the river. Such parts of the carse as are called inches, are elevated above the flat ground which has been covered with water. The soil of these eminences is[…]"; "A carse is a district of country, consisting of deep horizontal depositions of alluvial or diluvial clay, on one or both sides of a considerable river; and may be of great or small extent, but generally comprehends a large tract of country[…]"Scotland