| Bretz presented a paper suggesting that the Channeled Scablands in eastern Washington were eroded catastrophically. |
| The Missoula Floods of Oregon and Washington states were also caused by breaking ice dams, resulting in the Channeled Scablands. |
| Examples can be seen in the flood regions result from glacial Lake Missoula, which created the channeled scablands in the Columbia Basin region of eastern Washington. |
| He named the Channeled Scablands, with its catastrophically water-carved coulees, dry waterfalls, potholes and huge erratic boulders. |
| Ring-necked Ducks are uncommon as breeders in low-elevation wetlands in eastern Washington, but rare east of the channeled scablands. |
| What did Mr. Bretz conclude from observing the channeled scablands? |
