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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
161 KM  HAUTERIVIAN  AGE  Hauterivian Age  130  133.9  DEFINITE  1.5  APPROX    TMCM  22-SEP-09     
162 KO  VALANGINIAN  AGE  Valanginian Age  133.9  140.2  APPROX  DEFINITE    TMCM  22-SEP-09     
163 KP  BERRIASIAN  AGE  Berriasian Age  140.2  145.5  DEFINITE  DEFINITE    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  DEFINITE  Not on 2009 BGS Geological Time Chart; no direct replacement term.  TMCM  22-SEP-09  TMCM  09-NOV-11 
165 KS  JURASSIC  PERIOD  Jurassic Period  145.5  199.6  DEFINITE  DEFINITE  .6    TMCM  22-SEP-09     
166 KT  LATE JURASSIC  EPOCH  Late Jurassic Epoch  145.5  161.2  DEFINITE  DEFINITE    TMCM  22-SEP-09     
167 KU  VOLGIAN [OBSOLETE AGE TERM: USE TITHONIAN]  AGE  Volgian Age [Obsolete age term]  145.5  150.8  DEFINITE  DEFINITE  Not on 2009 BGS Geological Time Chart; use JI Tithonian.  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  INTERP  Not on 2009 BGS Geological Time Chart; no direct replacement term.  TMCM  22-SEP-09  TMCM  09-NOV-11 
169 KZ  TITHONIAN  AGE  Tithonian Age  145.5  150.8  DEFINITE  DEFINITE    TMCM  22-SEP-09     
170 MZ  KIMMERIDGIAN  AGE  Kimmeridgian Age  150.8  155.6  DEFINITE  APPROX    TMCM  22-SEP-09     
171 OXFORDIAN  AGE  Oxfordian Age  155.6  161.2  APPROX  DEFINITE    TMCM  22-SEP-09     
172 N1  MID JURASSIC  EPOCH  Mid Jurassic Epoch  161.2  175.6  DEFINITE  DEFINITE    TMCM  22-SEP-09     
173 NA  CALLOVIAN  AGE  Callovian Age  161.2  164.7  DEFINITE  DEFINITE    TMCM  22-SEP-09     
174 NB  BATHONIAN  AGE  Bathonian Age  164.7  167.7  DEFINITE  DEFINITE  3.5    TMCM  22-SEP-09     
175 NC  BAJOCIAN  AGE  Bajocian Age  167.7  171.6  DEFINITE  3.5  DEFINITE    TMCM  22-SEP-09     
176 NE  AALENIAN  AGE  Aalenian Age  171.6  175.6  DEFINITE  DEFINITE    TMCM  22-SEP-09     
177 NI  EARLY JURASSIC  EPOCH  Early Jurassic Epoch  175.6  199.6  DEFINITE  DEFINITE  .6    TMCM  22-SEP-09     
178 NL  TOARCIAN  AGE  Toarcian Age  175.6  183  DEFINITE  DEFINITE  1.5    TMCM  22-SEP-09     
179 NM  PLIENSBACHIAN  AGE  Pliensbachian Age  183  189.6  DEFINITE  1.5  DEFINITE  1.5    TMCM  22-SEP-09     
180 NME  SINEMURIAN  AGE  Sinemurian Age  189.6  196.5  DEFINITE  1.5  DEFINITE    TMCM  22-SEP-09     

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