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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
221 OS  HADEAN  Hadean  4000  4600  DEFINITE  DEFINITE  Informal name.  TMCM  23-FEB-10     
222 OSA  PASTONIAN  AGE  Pastonian Age  1.6  1.806  INTERP  DEFINITE  Contemporaneous with Tiglian C5-6; see RR/04/04.  TMCM  22-SEP-09     
223 OT  LUDHAMIAN  AGE  Ludhamian Age  2.2  2.3  INTERP  INTERP  Contemporaneous with Tiglian A; see RR/04/04.  TMCM  22-SEP-09     
224 OTR  SAALIAN  AGE  Saalian Age  .126  .362  QUAT  QUAT  Contemporaneous with Wolstonian; MIS 6-10; see RR/04/04.  TMCM  22-SEP-09     
225 OU  MENAPIAN  AGE  Menapian Age  1.2  INTERP  INTERP  See RR/04/04.  TMCM  22-SEP-09     
226 OV  TIGLIAN C  SUB-AGE  Tiglian C Sub-age  1.6  2.1  INTERP  INTERP  See RR/04/04.  TMCM  22-SEP-09     
227 OW  REUVERIAN  AGE  Reuverian Age  2.4  2.588  INTERP  DEFINITE    TMCM  22-SEP-09     
228 OX  RUPELIAN  AGE  Rupelian Age  28.4  33.9  DEFINITE  .1  DEFINITE  .1    TMCM  22-SEP-09     
229 OY  BARTONIAN  AGE  Bartonian Age  37.2  40.4  DEFINITE  .1  DEFINITE  .2    TMCM  22-SEP-09     
230 OZ  LATE PALEOCENE  SUB-EPOCH  Late Paleocene Sub-epoch  55.8  58.7  DEFINITE  .2  DEFINITE  .2    TMCM  22-SEP-09     
231 EARLY PALEOCENE  SUB-EPOCH  Early Paleocene Sub-epoch  61.1  65.5  APPROX  DEFINITE  .3    TMCM  22-SEP-09     
232 PA  MAASTRICHTIAN  AGE  Maastrichtian Age  65.5  70.6  DEFINITE  .3  DEFINITE  .6    TMCM  22-SEP-09     
233 PF  TURONIAN  AGE  Turonian Age  88.6  93.6  APPROX  DEFINITE  .8    TMCM  22-SEP-09     
234 PI  APTIAN  AGE  Aptian Age  112  125  DEFINITE  DEFINITE    TMCM  22-SEP-09     
235 PK  HETTANGIAN  AGE  Hettangian Age  196.5  199.6  DEFINITE  DEFINITE  .6    TMCM  22-SEP-09     
236 PL  CARNIAN  AGE  Carnian Age  216.5  228.7  DEFINITE  APPROX    TMCM  22-SEP-09     
237 PLC  OLENEKIAN  AGE  Olenekian Age  245.9  249.5  APPROX  APPROX    TMCM  22-SEP-09     
238 PS  LATE PALAEOZOIC  SUB-ERA  Late Palaeozoic Sub-era  251  416  DEFINITE  .4  DEFINITE  2.8    TMCM  22-SEP-09     
239 PT  EARLY PERMIAN [OBSOLETE AGE TERM: USE CISURALIAN]  EPOCH  Early Permian Epoch [Obsolete age term]  270.6  299  DEFINITE  .7  DEFINITE  .8  Not on 2009 BGS Geological Time Chart; use PLC Cisuralian.  TMCM  22-SEP-09  TMCM  09-NOV-11 
240 PU  GUADALUPIAN  EPOCH  Guadalupian Epoch  260.4  270.6  DEFINITE  .7  DEFINITE  .7    TMCM  22-SEP-09     

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