Explanation of Abbreviations and SymbolsField
Fields located in two or more counties have county names listed in order of oil discovery.
STP, St. Peter;
Kind of rock
DS, sandy dolomite;
LS, sandy limestone;
OL, oolitic limestone;
ABD Field abandoned
REV Field rivived
C, stratigraphic trap;
H, strata horizontal or nearly horizontal;
Combinations of the letters are used when more than one factor applies.
X Correct entry not determinable
Updated 12/11/2009 BGH