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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
341 QMIS071  AQUITANIAN  AGE  Aquitanian Age  20.43  23.03  DEFINITE  0  DEFINITE  0    C  TMCM  22-SEP-09     
342 QMIS072  PALAEOGENE  PERIOD  Palaeogene Period  23.03  65.5  DEFINITE  0  DEFINITE  .3    C  TMCM  22-SEP-09     
343 QMIS073  OLIGOCENE  EPOCH  Oligocene Epoch  23.03  33.9  DEFINITE  0  DEFINITE  .1    C  TMCM  22-SEP-09     
344 QMIS074  LATE OLIGOCENE  SUB-EPOCH  Late Oligocene Sub-epoch  23.03  28.4  DEFINITE  0  DEFINITE  .1    C  TMCM  22-SEP-09     
345 QMIS075  CHATTIAN  AGE  Chattian Age  23.03  28.4  DEFINITE  0  DEFINITE  .1    C  TMCM  22-SEP-09     
346 QMIS076  EARLY OLIGOCENE  SUB-EPOCH  Early Oligocene Sub-epoch  28.4  33.9  DEFINITE  .1  DEFINITE  .1    C  TMCM  22-SEP-09     
347 QMIS077  EOCENE  EPOCH  Eocene Epoch  33.9  55.8  DEFINITE  .1  DEFINITE  .2    C  TMCM  22-SEP-09     
348 QMIS078  LATE EOCENE  SUB-EPOCH  Late Eocene Sub-epoch  33.9  37.2  DEFINITE  .1  DEFINITE  .1    C  TMCM  22-SEP-09     
349 QMIS079  PRIABONIAN  AGE  Priabonian Age  33.9  37.2  DEFINITE  .1  DEFINITE  .1    C  TMCM  22-SEP-09     
350 QMIS080  MID EOCENE  SUB-EPOCH  Mid Eocene Sub-epoch  37.2  48.6  DEFINITE  .1  DEFINITE  .2    C  TMCM  22-SEP-09     
351 QMIS081  LUTETIAN  AGE  Lutetian Age  40.4  48.6  DEFINITE  .2  DEFINITE  .2    C  TMCM  22-SEP-09     
352 QMIS082  EARLY EOCENE  SUB-EPOCH  Early Eocene Sub-epoch  48.6  55.8  DEFINITE  .2  DEFINITE  .2    C  TMCM  22-SEP-09     
353 QMIS083  YPRESIAN  AGE  Ypresian Age  48.6  55.8  DEFINITE  .2  DEFINITE  .2    C  TMCM  22-SEP-09     
354 QMIS084  SILESIAN [OBSOLETE AGE TERM: CLOSEST CURRENT TERM IS PENNSYLVANIAN]  SUB-PERIOD  Silesian Sub-period [Obsolete age term]  299  326.4  DEFINITE  .8  DEFINITE  1.6  Not on 2009 BGS Geological Time Chart; no direct replacement term.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
355 QMIS085  DINANTIAN [OBSOLETE AGE TERM: CLOSEST CURRENT TERM IS MISSISSIPPIAN]  SUB-PERIOD  Dinantian Sub-period [Obsolete age term]  326.4  359.2  DEFINITE  1.6  DEFINITE  2.5  Not on 2009 BGS Geological Time Chart; no direct replacement term.  O  TMCM  22-SEP-09  TMCM  09-NOV-11 
356 QMIS086  STEPHANIAN  AGE  Stephanian Age  299  307  DEFINITE  .8  INTERP  0  British regional age.  C  TMCM  22-SEP-09     
357 QMIS087  WESTPHALIAN D  SUB-AGE  Westphalian D Sub-age  307  309  INTERP  0  INTERP  0  British regional sub-age.  C  TMCM  22-SEP-09     
358 QMIS088  BOLSOVIAN  SUB-AGE  Bolsovian Sub-age  309  310  INTERP  0  INTERP  0  British regional sub-age; also known as Westphalian C.  C  TMCM  22-SEP-09     
359 QMIS089  DUCKMANTIAN  SUB-AGE  Duckmantian Sub-age  310  312  INTERP  0  INTERP  0  British regional sub-age; also known as Westphalian B.  C  TMCM  22-SEP-09     
360 QMIS090  WESTPHALIAN B  SUB-AGE  Westphalian B Sub-age  310  312  INTERP  0  INTERP  0  Not on 2009 BGS Geological Time Chart; British regional sub-age; use CB Duckmantian.  O  TMCM  22-SEP-09     

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