Some of these coverages are from historic maps, others are more recent. Geologists in the ER Project are doing fieldwork to update the geological maps. The floodplains in this coverage are very general. Soils data are available for the whole Laboratory. Soil unit boundaries are derived from interpretation of unrectified aerial surveys and may be in error by 250 feet or more.
Geomorphology is the geologic study of the configuration and evolution of land forms.
All geology on this map was digitized directly from a map by Weir and Purtymun. It has not been checked for accuracy. Geologic units are not consistent with those of later workers in other portions of the Laboratory. This map is also available with a geologic cross section. This picture shows part of a program that enables users to select specific boring sites and display the boring logs.