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DIC_GEOCHRON (410 rows)
Dictionary table holding codes, names and radiometric ages of geochronological intervals that can be used in BGS databases. It is this table that acts as the domain constraint on corporate data tables.


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Row CODE DESCRIPTION RANK_CODE TRANSLATION MIN_AGE MAX_AGE MIN_AGE_TYPE_CODE MIN_AGE_PLUS_OR_MINUS MAX_AGE_TYPE_CODE MAX_AGE_PLUS_OR_MINUS COMMENTS STATUS USER_ENTERED DATE_ENTERED USER_UPDATED DATE_UPDATED
191 O  PALAEOZOIC  ERA  Palaeozoic Era  251  542  DEFINITE  .4  DEFINITE  1    C  TMCM  22-SEP-09     
192 O1  PERMIAN  PERIOD  Permian Period  251  299  DEFINITE  .4  DEFINITE  .8    C  TMCM  22-SEP-09     
193 O2  LATE PERMIAN [OBSOLETE AGE TERM: NO CURRENT DIRECT EQUIVALENT]  EPOCH  Late Permian Epoch [Obsolete age term]  251  270.6  DEFINITE  .4  DEFINITE  .7  Not on 2009 BGS Geological Time Chart; no direct replacement term.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
194 O3  TATARIAN [OBSOLETE AGE TERM: CLOSEST CURRENT TERM IS LOPINGIAN]  AGE  Tatarian Age [Obsolete age term]  251  263  DEFINITE  .4  INTERP  0  Not on 2009 BGS Geological Time Chart; no direct replacement term.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
195 O4  LOPINGIAN  EPOCH  Lopingian Epoch  251  260.4  DEFINITE  .4  DEFINITE  .7    C  TMCM  22-SEP-09     
196 OA  CHANGHSINGIAN  AGE  Changhsingian Age  251  253.8  DEFINITE  .4  DEFINITE  .7    C  TMCM  22-SEP-09     
197 OB  WUCHIAPINGIAN  AGE  Wuchiapingian Age  253.8  260.4  DEFINITE  .7  DEFINITE  .7    C  TMCM  22-SEP-09     
198 OC  CAPITANIAN  AGE  Capitanian Age  260.4  265.8  DEFINITE  .7  DEFINITE  .7    C  TMCM  22-SEP-09     
199 OD  WORDIAN  AGE  Wordian Age  265.8  268  DEFINITE  .7  DEFINITE  .7    C  TMCM  22-SEP-09     
200 ODP  CISURALIAN  EPOCH  Cisuralian Epoch  270.6  299  DEFINITE  .7  DEFINITE  .8  Also known as Early Permian Epoch.  C  TMCM  22-SEP-09     
201 ODW  KUNGURIAN  AGE  Kungurian Age  270.6  275.6  DEFINITE  .7  DEFINITE  .7    C  TMCM  22-SEP-09     
202 OE  ARTINSKIAN  AGE  Artinskian Age  275.6  284.4  DEFINITE  .7  DEFINITE  .7    C  TMCM  22-SEP-09     
203 OEA  ASSELIAN  AGE  Asselian Age  294.6  299  DEFINITE  .8  DEFINITE  .8    C  TMCM  22-SEP-09     
204 OF  CARBONIFEROUS  PERIOD  Carboniferous Period  299  359.2  DEFINITE  .8  DEFINITE  2.5    C  TMCM  22-SEP-09     
205 OFL  PENNSYLVANIAN  SUB-PERIOD  Pennsylvanian Sub-period  299  318.1  DEFINITE  .8  DEFINITE  1.3    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
206 OG  LATE PENNSYLVANIAN  EPOCH  Late Pennsylvanian Epoch  299  306.5  DEFINITE  .8  DEFINITE  1    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
207 OH  GZHELIAN  AGE  Gzhelian Age  299  303.9  DEFINITE  .8  DEFINITE  .9    C  TMCM  22-SEP-09     
208 OI  KASIMOVIAN  AGE  Kasimovian Age  303.9  306.5  DEFINITE  .9  DEFINITE  1    C  TMCM  22-SEP-09     
209 OJ  MID PENNSYLVANIAN  EPOCH  Mid Pennsylvanian Epoch  306.5  311.7  DEFINITE  1  DEFINITE  1.1    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
210 OK  MOSCOVIAN  AGE  Moscovian Age  306.5  311.7  DEFINITE  1  DEFINITE  1.1    C  TMCM  22-SEP-09     

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