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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
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     
211 OKA  EARLY PENNSYLVANIAN  EPOCH  Early Pennsylvanian Epoch  311.7  318.1  DEFINITE  1.1  DEFINITE  1.3    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
212 OL  MISSISSIPPIAN  SUB-PERIOD  Mississippian Sub-period  318.1  359.2  DEFINITE  1.3  DEFINITE  2.5    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
213 OLA  LATE MISSISSIPPIAN  EPOCH  Late Mississippian Epoch  318.1  326.4  DEFINITE  1.3  DEFINITE  1.6    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
214 OM  MID MISSISSIPPIAN  EPOCH  Mid Mississippian Epoch  326.4  345.3  DEFINITE  1.6  DEFINITE  2.1    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
215 OMD  VISEAN  AGE  Visean Age  326.4  345.3  DEFINITE  1.6  DEFINITE  2.1    C  TMCM  22-SEP-09     
216 ON  EARLY MISSISSIPPIAN  EPOCH  Early Mississippian Epoch  345.3  359.2  DEFINITE  2.1  DEFINITE  2.5    C  TMCM  22-SEP-09  TMCM  09-NOV-10 
217 OO  QUATERNARY [OBSOLETE CONCEPT FOR THIS PERIOD]  PERIOD  Quaternary Period [Obsolete concept for period]  0  1.806  DEFINITE  0  DEFINITE  0  Used when Plio-Pleistocene boundary was placed at 1.806 MA, no longer the accepted BGS definition; use Q Quaternary.  O  TMCM  16-FEB-10  TMCM  09-NOV-11 
218 OP  NEOGENE [OBSOLETE CONCEPT FOR THIS PERIOD]  PERIOD  Neogene Period [Obsolete concept for period]  1.806  23.03  DEFINITE  0  DEFINITE  0  Used when Plio-Pleistocene boundary was placed at 1.806 MA, no longer the accepted BGS definition; use N Neogene.  O  TMCM  16-FEB-10  TMCM  09-NOV-11 
219 OQ  PLIOCENE [OBSOLETE CONCEPT FOR THIS EPOCH]  EPOCH  Pliocene Epoch [Obsolete concept for epoch]  1.806  5.322  DEFINITE  0  DEFINITE  0  Used when Plio-Pleistocene boundary was placed at 1.806 MA, no longer the accepted BGS definition; use NP Pliocene.  O  TMCM  16-FEB-10  TMCM  09-NOV-11 
220 OR  TREMADOC [OBSOLETE AGE CODE]  EPOCH  Tremadoc Epoch [Obsolete age code]  478.6  488.3  DEFINITE  1.7  DEFINITE  1.7  Code not suitable for use within Ordovician; use OTR Tremadocian or O1 Tremadoc.  O  TMCM  23-FEB-10  TMCM  09-NOV-11 

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