General Description When one travels southeastward from the Capitol at Washington he crosses Anacostia River and climbs a rather steep elevation known as Good Hope Hill. The western slope of this hill is composed of bedded deposits of Cretaceous and Tertiary ages, but the summit is capped by unconsolidated gravel and sand of a much younger formation. The gravel bed ranges in thickness from 20 to 40 feet and is composed largely of pebbles and cobbles of vein quartz, quartzite and fossiliferous chert; and the sand associated with the gravel is generally well washed and pure, although in some places it is intermixed with clay in the form of lenses and irregular masses. Good Hope Hill has an altitude of about 300 feet, but instead of being an isolated knob, as one might suppose from the name, it is a small part of a much dissected plateau capped by the . . .
- Received 1 June 1931.
- © 1931 Geological Society of America