what are the two breeds which were crossed to make the columbia
Columbia sheep Beginning in 1912 in Laramie, Wyoming, Lincoln rams were crossed with Rambouillet ewes.[2] In 1918, the foundation flock was moved to the U.S. Sheep Experiment Station near Dubois, Idaho, for further refinement. Today's Columbia is a popular breed, with heavy, white fleeces and good growth characteristics. It is one of the larger breeds, and is often used for cross breeding in commercial western flocks.