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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.

Displaying rows 251 to 270 of 410

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
251	Q2C	ARUNDIAN	AGE	Arundian Age	339	343	INTERP	0	INTERP	0	British regional age.	C	TMCM	22-SEP-09
252	Q2G	FAMENNIAN	AGE	Famennian Age	359.2	374.5	DEFINITE	2.5	DEFINITE	2.6		C	TMCM	22-SEP-09
253	Q2I	KATIAN	AGE	Katian Age	445.6	455.8	DEFINITE	1.5	DEFINITE	1.6		C	TMCM	22-SEP-09
254	Q2T	EARLY ORDOVICIAN	EPOCH	Early Ordovician Epoch	471.8	488.3	DEFINITE	1.6	DEFINITE	1.7		C	TMCM	22-SEP-09
255	QA	RAWTHEYAN	AGE	Rawtheyan Age	445.6	447	DEFINITE	1.5	INTERP	0	Not on 2009 BGS Geological Time Chart but retained for use.	C	TMCM	22-SEP-09
256	QB	ONNIAN	SUB-AGE	Onnian Sub-age	451	452	INTERP	0	INTERP	0	Not on 2009 BGS Geological Time Chart but retained for use.	C	TMCM	22-SEP-09
257	QC	WOOLSTONIAN	SUB-AGE	Woolstonian Sub-age	454	455	INTERP	0	INTERP	0	Not on 2009 BGS Geological Time Chart but retained for use.	C	TMCM	22-SEP-09
258	QD	AURELUCIAN	AGE	Aurelucian Age	458	460.9	INTERP	0	DEFINITE	1.6	Not on 2009 BGS Geological Time Chart but retained for use.	C	TMCM	22-SEP-09
259	QDD	PIACENZIAN [OBSOLETE CONCEPT FOR THIS AGE]	AGE	Piacenzian Age [Obsolete concept for age]	1.806	3.6	DEFINITE	0	DEFINITE	0	Used when Plio-Pleistocene boundary was placed at 1.806 MA, no longer the accepted BGS definition; use NC Piacenzian.	O	TMCM	16-FEB-10	TMCM	09-NOV-11
260	QDL	MARINE ISOTOPE STAGE 11	MIS	Marine Isotope Stage 11	.362	.423	QUAT	0	QUAT	0		C	TMCM	22-SEP-09
261	QDW	CARADOC [OBSOLETE CONCEPT FOR THIS EPOCH]	EPOCH	Caradoc Epoch [Obsolete concept for epoch]	451	459	INTERP	0	INTERP	0	Used when base was placed at base of Costonian, no longer the accepted BGS definition; use O4 Caradoc.	O	TMCM	23-FEB-10	TMCM	09-NOV-11
262	QE	LLANDEILO [OBSOLETE AGE TERM: USE LLANDEILIAN]	EPOCH	Llandeilo Epoch [Obsolete age term]	460.9	464	DEFINITE	1.6	INTERP	0	Not on 2009 BGS Geological Time Chart; use O3 Llandeilian.	O	TMCM	23-FEB-10	TMCM	09-NOV-11
263	QF	LLANVIRN [OBSOLETE CONCEPT FOR THIS EPOCH: USE ABEREIDDIAN]	EPOCH	Llanvirn Epoch [Obsolete concept for epoch]	464	467	INTERP	0	INTERP	0	Used when Llanvirn epoch was defined as preceeding the Llandeilo, no longer the accepted BGS definition; use O2 Abereiddian.	O	TMCM	23-FEB-10	TMCM	09-NOV-11
264	QH	CAMBRIAN STAGE 5	AGE	Cambrian Stage 5	506.5	510	APPROX	0	APPROX	0		C	TMCM	22-SEP-09
265	QI	TERRENEUVIAN	EPOCH	Terreneuvian Epoch	521	542	APPROX	0	DEFINITE	1		C	TMCM	22-SEP-09
266	QL	COMLEY	EPOCH	Comley Epoch	508	528	INTERP	0	INTERP	0	British regional epoch.	C	TMCM	22-SEP-09
267	QMIS001	NEOPROTEROZOIC III [OBSOLETE AGE TERM: USE EDIACARAN]	PERIOD	Neoproterozoic III Period [Obsolete age term]	542	635	DEFINITE	1	DEFINITE	0	Not on 2009 BGS Geological Time Chart; use AD Ediacaran Period.	O	TMCM	22-SEP-09	TMCM	09-NOV-11
268	QMIS002	ECTASIAN	PERIOD	Ectasian Period	1200	1400	DEFINITE	0	DEFINITE	0		C	TMCM	22-SEP-09
269	QMIS003	STRATHERIAN	PERIOD	Stratherian Period	1600	1800	DEFINITE	0	DEFINITE	0		C	TMCM	22-SEP-09
270	QMIS004	ARCHAEAN	EON	Archaean Eon	2500	4000	DEFINITE	0	DEFINITE	0		C	TMCM	22-SEP-09

Displaying rows 251 to 270 of 410