The Central Plains tradition is generally located in the areas of Kansas, Nebraska, Western Missouri and southwestern Iowa. It is characterized by farming and the construction of large earthlodge houses. The Nebraska Phase is part of the Central Plains Tradition. The Nebraska Phase is made up of archaeological remains found in eastern Nebraska, soutwestern Iowa, northwestern Missouri, northeastern Kansas. Settlement patterns in this area were generally made up of single farmsteads and clusters of earthlodges built around land formations such as ridge summits, valley wall slopes, and low terraces. Archaeological evidence recovered shows widespread use of Bison bones used for farming activities. An example of this would be the Bison-scapula hoe. It is believed that they eventually moved north, possibly due to drought, and may have been absorbed by the Middle Missouri tradition people. A good example of this northward movement is the Crow Creek massacre site in South Dakota.