Marshall Pass was discovered by and named for Lt. William L. Marshall, of the Wheeler Survey, in 1873.

The current spelling of "Eolus" was first used in the 1878 Wheeler Survey.

The Wheeler Survey was a survey of a portion of the United States lying west of the 100th meridian.

This plan necessitated what became known as the Wheeler Survey.

In 1874 Cope volunteered for the Wheeler Survey.

In 1874 Cope discovered the Puerco formation in New Mexico during the Wheeler Survey.

As part of the Wheeler Survey, he was able to shop at commissaries.

In 1877 the lengthy official report of the Wheeler Survey of New Mexico was published.

The Wheeler Survey referred to it as Northwest Palisade in 1878.

It is named for George Wheeler, leader of the Wheeler Survey of the late 19th century.