This is the name associated with a particular geologic (Lithologic or
Geochronologic) unit. You may enter a partial (the beginning letters)
or complete unit name.
New! Now you
can enter lithologic characteristics (i.e. "formation" or "limestone")
can be included as part of the unit name (see Sample 3 below). In the
latter case the search will repeat, as necessary, removing the last
word of the input unit name, until a match is found. All matches from
the usage data are also reported. Upper and lower case characters are
considered equal so either may be used.
Leave this entry blank if you do not wish to limit your search by Unit Name.