experimental
Définition
broader |
Upper Ordovician
|
has beginning |
Base of Hirnantian
|
has end |
Base of Silurian
|
in scheme |
Chronostratigraphy / Geochronology
|
is gSSA |
false
|
is gSSP |
true
|
label |
Hirnantien
| Hirnantian
|
mnemo |
HIRN
|
nature |
Référent
|
notation |
o7
|
pref label |
Hirnantien
| Hirnantian
|
rgb coordinate blue |
171
|
rgb coordinate green |
219
|
rgb coordinate red |
166
|
source |
Gradstein et al. (2012)
|
spatial |
Monde
|
status |
Valid
|
type |
Concept
|
type chronostrat age |
Stage
|
type geochrono age |
Age
|