DCHP-1 Online
Alberta plain 
the southeastern part of the province of Alberta, characterized by flat prairie.
- 1952 The outstanding features of the Alberta plain . . . are the deeply entrenched valleys in which flow the main tributaries of the Saskatchewan River system.
- 1952 The outstanding features of the Alberta plain . . . are the deeply entrenched valleys in which flow the main tributaries of the Saskatchewan River system.