Geologic units, structural features, magnetic and gravity anomaly contours and radiometric ages of this area
Mineral resource assessment of the Venezuelan Guayana Shield, including geologic unit map
A digital version of the Geologic Map of the United States, originally published at a scale of 1:2,500,000 (King and Beikman, 1974b). It excludes Alaska and Hawaii.
Methods used to create several styles for lithology or geologic time, including style files for Lithclass lithologic categories, and ISC and DNAG timescales.