Dorothea Lange's Migrant Mother depicts destitute pea pickers in California, centering on Florence Owens Thompson, age 32, a mother of seven children, in Nipomo, California, March 1936. Her four daughters (left to right) are: Viola, Ruby, Katherine and Norma. The Great Depression was a severe worldwide economic depression in the decade preceding World War II. The depression originated in the U.S., after the fall in stock prices that began around September 4, 1929 and became worldwide news with the stock market crash of October 29, 1929 (known as Black Tuesday). Farming and rural areas suffered as crop prices fell by approximately 60%. Facing plummeting demand with few alternate sources of jobs, areas dependent on primary sector industries such as cash cropping, mining and logging suffered the most.