Aside from the influence of his father, Morris's archaeological activity began in earnest after meeting
Edgar L. Hewett on a train in 1912. Later that year, he began his first field excavation in the
La Plata district of Southwestern Colorado. In 1912 he also worked at
Quirigua, Guatemala, where he returned for additional work in 1914. After his studies, Morris returned to
Aztec Ruins in 1917 as a representative of the
American Museum of Natural History to explore the historic
pueblo. In 1924, Morris worked for the
Carnegie Institution of Washington and spent the next five years excavating at
Chichen Itza, Yucatán. Morris's first wife
Ann Axtell Morris was critical to his research. She traveled in tandem with him and other notable figures in archaeology throughout the Southwest United States and Mexico with support from the
Carnegie Institution to conduct fieldwork in the 1920s and 1930s. Among the many projects she was a part of, Ann was an important addition to the task of documenting and reconstructing the
Temple of the Warriors in
Chichen Itza. Earl Morris led a number of excavations in the field from 1916 to 1940 for the
University of Colorado at Boulder (CU), the American Museum of Natural History, the Carnegie Institution of Washington, and the
School of American Archaeology (SAA). These archaeological investigations led to the 69 publications from 1911 to 1956 and to extensive new collections of pottery, stone implements, baskets, sandals, and other artifacts for the institutions that supported his work. As a prominent member of the archaeological community, Morris corresponded and collaborated with influential archaeologists, anthropologists, and other scientists of the era, including
Nels Nelson,
A. V. Kidder,
Jesse Nusbaum,
Walter Fewkes,
Edgar Hewett,
Clark Wissler,
A. E. Douglass,
Junius Henderson, and
Sylvanus G. Morley. ==Legacy==