Maryland Geological Survey (1896 - Present) is a division of the Maryland state government charged with 'investigating the earth resources' in the state. This includes geologic mapping, topographic and geophysical mapping, environmental geology, water-resources investigations, geology of mineral resources, and coastal and estuarine geology. In 1969, the Maryland Geological Survey became an agency within the Department of Natural Resources, and in 1995 it became a a division of the Department of Natural Resources Resource Assessment Service.