Lexicon
Intervals
Macrostrat
Search
Alexandrian
159
Type
Age
Age range
443.1–438.6
Ma
International Timescale
Llandovery
Telychian
Aeronian
Rhuddanian
Late Ordovician
Hirnantian
COSUNA
Niagaran
Alexandrian
North American Regional
Niagaran
Alexandrian
Gamachian
443.2
443.0
442.8
442.6
442.4
442.2
442.0
441.8
441.6
441.4
441.2
441.0
440.8
440.6
440.4
440.2
440.0
439.8
439.6
439.4
439.2
439.0
438.8
438.6
438.4
Details and map
View on map
View in Sift
