Geological Timescale

pyrolite includes a simple geological timescale, based on a recent verion of the International Chronostratigraphic Chart 1. The Timescale class can be used to look up names for specific geological ages, to look up times for known geological age names and to access a reference table for all of these.

from pyrolite.util.time import Timescale, age_name

ts = Timescale()

eg = ts.data.iloc[:, :5]  # the first five columns of this data table
eg

	Name	Level	Start	End	MeanAge
Ident
Phanerozoic	Phanerozoic	Eon	541.000	0.0	270.500
Phanerozoic-Cenozoic	Cenozoic	Era	66.000	0.0	33.000
Phanerozoic-Cenozoic-Quaternary	Quaternary	Period	2.580	0.0	1.290
Phanerozoic-Cenozoic-Quaternary-Holocene	Holocene	Epoch	0.012	0.0	0.006
Phanerozoic-Cenozoic-Quaternary-Holocene-Meghalayan	Meghalayan	Age	0.004	0.0	0.002
...	...	...	...	...	...
Precambrian-Archean-Meso-archean	Meso-archean	Period	3200.000	2800.0	3000.000
Precambrian-Archean-Paleo-archean	Paleo-archean	Period	3600.000	3200.0	3400.000
Precambrian-Archean-Eo-archean	Eo-archean	Period	4000.000	3600.0	3800.000
Precambrian-Hadean	Hadean	Era	4567.300	4000.0	4283.650
Precambrian-Hadean-Hadean	Hadean	Period	4567.300	4000.0	4283.650

179 rows × 5 columns

References

1

Cohen, K.M., Finney, S.C., Gibbard, P.L., Fan, J.-X., 2013. The ICS International Chronostratigraphic Chart. Episodes 36, 199–204.

See also

Examples:

Timescale

Modules, Classes and Functions:

pyrolite.util.time, Timescale