In February 1967, a Committee on Standard Stratigraphic Coding was activated by The American Association of Petroleum Geologists. This Committee was to determine the amount of detail necessary in a nationwide geologic study designed to establish the lowest level of stratigraphic division that needed to be standardized and to recommend a standard measure of abbreviating stratigraphic terminology. A standard stratigraphic code was developed by the Committee and adopted by AAPG in September 1967. The code was published in the October 1967 issue of the AAPG Bulletin. Since then, the code has been adopted by many organizations.
The U.S. Geological Survey...
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