Eakle researched the mineralogical conditions of areas of California, Nevada and Hawaii.

His work on Oahu, the third largest island in Hawaii, included identifying numerous new minerals.

[1][3][4][5] While in Hawaii, Eakle did field work focused on mineralogical conditions Oahu.

[4][6] His research determined that the islands were unlikely to produce precious metals, specifically gold and silver, due to the basalt composition, making the landscape low in silica.

[2] On June 24, 1931, Eakle was taken to St. Francis Hospital suffering from pneumonia, which he had contracted as a result of influenza he had earlier in the month.