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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
151 JT  MESOZOIC  ERA  Mesozoic Era  65.5  251  DEFINITE  .3  DEFINITE  .4    C  TMCM  22-SEP-09     
152 JU  CRETACEOUS  PERIOD  Cretaceous Period  65.5  145.5  DEFINITE  .3  DEFINITE  4    C  TMCM  22-SEP-09     
153 JV  LATE CRETACEOUS  EPOCH  Late Cretaceous Epoch  65.5  99.6  DEFINITE  .3  DEFINITE  .9    C  TMCM  22-SEP-09     
154 K  CAMPANIAN  AGE  Campanian Age  70.6  83.5  DEFINITE  .6  DEFINITE  .7    C  TMCM  22-SEP-09     
155 KA  SANTONIAN  AGE  Santonian Age  83.5  85.8  DEFINITE  .7  DEFINITE  .7    C  TMCM  22-SEP-09     
156 KB  CONIACIAN  AGE  Coniacian Age  85.8  88.6  DEFINITE  .7  APPROX  0    C  TMCM  22-SEP-09     
157 KC  CENOMANIAN  AGE  Cenomanian Age  93.6  99.6  DEFINITE  .8  DEFINITE  .9    C  TMCM  22-SEP-09     
158 KE  EARLY CRETACEOUS  EPOCH  Early Cretaceous Epoch  99.6  145.5  DEFINITE  .9  DEFINITE  4    C  TMCM  22-SEP-09     
159 KH  ALBIAN  AGE  Albian Age  99.6  112  DEFINITE  .9  DEFINITE  1    C  TMCM  22-SEP-09     
160 KL  BARREMIAN  AGE  Barremian Age  125  130  DEFINITE  1  DEFINITE  1.5    C  TMCM  22-SEP-09     
161 KM  HAUTERIVIAN  AGE  Hauterivian Age  130  133.9  DEFINITE  1.5  APPROX  0    C  TMCM  22-SEP-09     
162 KO  VALANGINIAN  AGE  Valanginian Age  133.9  140.2  APPROX  0  DEFINITE  3    C  TMCM  22-SEP-09     
163 KP  BERRIASIAN  AGE  Berriasian Age  140.2  145.5  DEFINITE  3  DEFINITE  4    C  TMCM  22-SEP-09     
164 KR  RYAZANIAN [OBSOLETE AGE TERM: CLOSEST CURRENT TERM IS BERRIASIAN]  AGE  Ryazanian Age [Obsolete age term]  137  145.5  INTERP  0  DEFINITE  4  Not on 2009 BGS Geological Time Chart; no direct replacement term.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
165 KS  JURASSIC  PERIOD  Jurassic Period  145.5  199.6  DEFINITE  4  DEFINITE  .6    C  TMCM  22-SEP-09     
166 KT  LATE JURASSIC  EPOCH  Late Jurassic Epoch  145.5  161.2  DEFINITE  4  DEFINITE  4    C  TMCM  22-SEP-09     
167 KU  VOLGIAN [OBSOLETE AGE TERM: USE TITHONIAN]  AGE  Volgian Age [Obsolete age term]  145.5  150.8  DEFINITE  4  DEFINITE  4  Not on 2009 BGS Geological Time Chart; use JI Tithonian.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
168 KV  PORTLANDIAN [OBSOLETE AGE TERM: CLOSEST CURRENT TERM IS TITHONIAN]  AGE  Portlandian Age [Obsolete age term]  145.5  148  DEFINITE  4  INTERP  0  Not on 2009 BGS Geological Time Chart; no direct replacement term.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
169 KZ  TITHONIAN  AGE  Tithonian Age  145.5  150.8  DEFINITE  4  DEFINITE  4    C  TMCM  22-SEP-09     
170 MZ  KIMMERIDGIAN  AGE  Kimmeridgian Age  150.8  155.6  DEFINITE  4  APPROX  0    C  TMCM  22-SEP-09     

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