Since 1914, when Max Uhle began his work in Arica, an estimated 282 mummies have been found by archaeologists. Morro-I, at the base of the Morro de Arica, revealed 96 bodies at the unstratified (i.e., there are no discernible layers of stratigraphy, hindering relative dating techniques), mostly loose sand at the slope of the hill. Fifty-four adults were found: 27 female, 20 male and 7 of indeterminate sex; 42 children were also found: 7 female, 12 male, 23 indeterminate. This sample size suggests that the Chinchorro did not favor mummifying one sex over others.