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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
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 
221 OS  HADEAN  -  Hadean  4000  4600  DEFINITE  0  DEFINITE  0  Informal name.  C  TMCM  23-FEB-10     
222 OSA  PASTONIAN  AGE  Pastonian Age  1.6  1.806  INTERP  0  DEFINITE  0  Contemporaneous with Tiglian C5-6; see RR/04/04.  C  TMCM  22-SEP-09     
223 OT  LUDHAMIAN  AGE  Ludhamian Age  2.2  2.3  INTERP  0  INTERP  0  Contemporaneous with Tiglian A; see RR/04/04.  C  TMCM  22-SEP-09     
224 OTR  SAALIAN  AGE  Saalian Age  .126  .362  QUAT  0  QUAT  0  Contemporaneous with Wolstonian; MIS 6-10; see RR/04/04.  C  TMCM  22-SEP-09     
225 OU  MENAPIAN  AGE  Menapian Age  1  1.2  INTERP  0  INTERP  0  See RR/04/04.  C  TMCM  22-SEP-09     
226 OV  TIGLIAN C  SUB-AGE  Tiglian C Sub-age  1.6  2.1  INTERP  0  INTERP  0  See RR/04/04.  C  TMCM  22-SEP-09     
227 OW  REUVERIAN  AGE  Reuverian Age  2.4  2.588  INTERP  0  DEFINITE  0    C  TMCM  22-SEP-09     
228 OX  RUPELIAN  AGE  Rupelian Age  28.4  33.9  DEFINITE  .1  DEFINITE  .1    C  TMCM  22-SEP-09     
229 OY  BARTONIAN  AGE  Bartonian Age  37.2  40.4  DEFINITE  .1  DEFINITE  .2    C  TMCM  22-SEP-09     
230 OZ  LATE PALEOCENE  SUB-EPOCH  Late Paleocene Sub-epoch  55.8  58.7  DEFINITE  .2  DEFINITE  .2    C  TMCM  22-SEP-09     

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