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Time (Geologic)
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Includes archeological time, climatic, historic, and geologic time periods from
1993 forward.
s
Controlled terms include geologic time periods from Geological Periods Concept
Codes.
History Note:
Prior to 1993, search specific terms in title and keyterms and use Geological Periods Concept Codes (specific
codes in group CC647) for broad categories.
56
.DE.
(Descriptors)
.TM. (Time)
/DE
(Descriptors)
/TM (Time)
.KW. (Keywords)
.TM. (Time)
TS= or in TS
(Subject Terms)
TM= or in TM
(Time)
/IT (Index Terms)
/(L)IT.TM/FA
(Time)
Vendor DataStar
Dialog
Ovid
SilverPlatter
STN
Field tag
(field name)
Search
examples
Cambrian:
Paleozoic;
Devonian;
Ordovician:
Paleozoic;
Silurian.21st
century;
18th century
Cambrian--
Paleozoic;
Devonian;
Ordovician--
Paleozoic;
Silurian
21st century;
18th century
Cambrian:
Paleozoic;
Devonian;
Ordovician:
Paleozoic;
Silurian.21st
century;
18th century
Cambrian-:
Paleozoic-;
Devonian-;
Ordovician-:
Paleozoic-;
Silurian-
21st century;
18th century
Cambrian:
Paleozoic;
Devonian;
Ordovician:
Paleozoic;
Silurian 21st
century;
18th century
Display
examples
Paleozoic.DE.
Paleozoic.TM.
S paleozoic/DE
S Paleozoic/TM
Paleozoic.KW.
Paleozoic.TM.
Paleozoic in TS
Paleozoic in TM
S Paleozoic/IT
S Paleozoic(L)IT.
TM/FA
