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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
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     
361 QMIS091  LANGSETTIAN  SUB-AGE  Langsettian Sub-age  312  313  INTERP  0  INTERP  0  British regional sub-age; also known as Westphalian A.  C  TMCM  22-SEP-09     
362 QMIS092  NAMURIAN  AGE  Namurian Age  313  326.4  INTERP  0  DEFINITE  1.6  British regional age.  C  TMCM  22-SEP-09     
363 QMIS093  YEADONIAN  SUB-AGE  Yeadonian Sub-age  313  314  INTERP  0  INTERP  0  British regional sub-age.  C  TMCM  22-SEP-09     
364 QMIS094  MARSDENIAN  SUB-AGE  Marsdenian Sub-age  314  315  INTERP  0  INTERP  0  British regional sub-age.  C  TMCM  22-SEP-09     
365 QMIS095  ALPORTIAN  SUB-AGE  Alportian Sub-age  316  317  INTERP  0  INTERP  0  British regional sub-age.  C  TMCM  22-SEP-09     
366 QMIS096  CHOKIERIAN  SUB-AGE  Chokierian Sub-age  317  318.1  INTERP  0  DEFINITE  1.3  British regional sub-age.  C  TMCM  22-SEP-09     
367 QMIS097  ARNSBERGIAN  SUB-AGE  Arnsbergian Sub-age  318.1  322  DEFINITE  1.3  INTERP  0  British regional sub-age.  C  TMCM  22-SEP-09     
368 QMIS098  BRIGANTIAN  AGE  Brigantian Age  326.4  331  DEFINITE  1.6  INTERP  0  British regional age.  C  TMCM  22-SEP-09     
369 QMIS099  ASBIAN  AGE  Asbian Age  331  335  INTERP  0  INTERP  0  British regional age.  C  TMCM  22-SEP-09     
370 QMIS100  HOLKERIAN  AGE  Holkerian Age  335  339  INTERP  0  INTERP  0  British regional age.  C  TMCM  22-SEP-09     

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