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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
181 NML  TRIASSIC  PERIOD  Triassic Period  199.6  251  DEFINITE  .6  DEFINITE  .4    C  TMCM  22-SEP-09     
182 NMM  LATE TRIASSIC  EPOCH  Late Triassic Epoch  199.6  228.7  DEFINITE  .6  APPROX  0    C  TMCM  22-SEP-09     
183 NO  RHAETIAN  AGE  Rhaetian Age  199.6  203.6  DEFINITE  .6  DEFINITE  1.5    C  TMCM  22-SEP-09     
184 NOE  NORIAN  AGE  Norian Age  203.6  216.5  DEFINITE  1.5  DEFINITE  2    C  TMCM  22-SEP-09     
185 NOL  MID TRIASSIC  EPOCH  Mid Triassic Epoch  228.7  245.9  APPROX  0  APPROX  0    C  TMCM  22-SEP-09     
186 NP  LADINIAN  AGE  Ladinian Age  228.7  237  APPROX  0  DEFINITE  2    C  TMCM  22-SEP-09     
187 NS  ANISIAN  AGE  Anisian Age  237  245.9  DEFINITE  2  APPROX  0    C  TMCM  22-SEP-09     
188 NT  EARLY TRIASSIC  EPOCH  Early Triassic Epoch  245.9  251  APPROX  0  DEFINITE  .4    C  TMCM  22-SEP-09     
189 NW  INDUAN  AGE  Induan Age  249.5  251  APPROX  0  DEFINITE  .4    C  TMCM  22-SEP-09     
190 NZ  SCYTHIAN [OBSOLETE AGE TERM: USE EARLY TRIASSIC]  AGE  Scythian Age [Obsolete age term]  245.9  251  APPROX  0  DEFINITE  .4  Not on 2009 BGS Geological Time Chart; use TE Early Triassic.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
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     

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