Henry Gardiner Ferguson was an American geologist with the United States Geological Survey (USGS). He worked primarily in Nevada and was a pioneer in the geology of the central Great Basin, producing many publications, including multiple USGS geological maps of central Nevada. Ferguson was a lifelong friend and colleague of Levi Noble, a mentor to Ralph Roberts, and worked extensively with Siemon Muller. Along with his wife Alice Ferguson, he helped found the Moyaone Reserve community in Accokeek, Maryland.

The Moyaone Reserve is a neighborhood located within Piscataway Park in Accokeek. The neighborhood was given National Register of Historic Places status in 2020 and is within the historic viewshed of Mount Vernon. It is split between Prince George's County, Maryland and Charles County, Maryland. The name Moyaone is derived from name of the town Moyaone, the major town of the Piscataway Native American tribe. The archaeological remains of Moyaone are at the Accokeek Creek Site, within Piscataway Park.