USGS Thesaurus
Toggle navigation
Home
Advanced search
About...
My account
time periods
Home
time periods
Term
Metadata
time periods
Scope note
Geologic time periods and seasons of the year
More specific terms
NT1
↓
geologic time periods
►
▼
NT2
↓
phanerozoic
►
▼
NT3
↓
cenozoic
►
▼
NT4
↓
quaternary
►
NT4
↓
tertiary
►
NT3
↓
mesozoic
►
▼
NT4
↓
cretaceous
NT4
↓
jurassic
NT4
↓
triassic
NT3
↓
paleozoic
►
▼
NT4
↓
cambrian
NT4
↓
devonian
NT4
↓
mississippian
NT4
↓
ordovician
NT4
↓
pennsylvanian
NT4
↓
permian
NT4
↓
silurian
NT2
↓
precambrian
►
▼
NT3
↓
archaean
NT3
↓
hadean
NT3
↓
proterozoic
►
▼
NT4
↓
Neoproterozoic
►
NT1
↓
seasons
►
▼
NT2
↓
autumn
NT2
↓
spring (season)
NT2
↓
summer
NT2
↓
winter
Date of creation
20-Nov-2007
Accepted term
20-Nov-2007
Descendant terms
37
ARK
ark:/99152/t32dk0qexq067y
More specific terms
2
Alternative terms
0
Related terms
0
Notes
1
Metadata
BS8723-5
DC
MADS
SKOS-Core
VDEX
XTM
Zthes
JSON
JSON-LD
Search