Aalenian

System/ Period
Series/ Epoch
Stage/ Age
Age (Ma)
Age (Ma)
Cretaceous
Lower/ Early
Berriasian
younger
younger
Jurassic
Upper/ Late
Tithonian
~145.0
152.1
Jurassic
Upper/ Late
Kimmeridgian
152.1
157.3
Jurassic
Upper/ Late
Oxfordian
157.3
163.5
Jurassic
Middle
Callovian
163.5
166.1
Jurassic
Middle
Bathonian
166.1
168.3
Jurassic
Middle
Bajocian
168.3
170.3
Jurassic
Middle
Aalenian
170.3
174.1
Jurassic
Lower/ Early
Toarcian
174.1
182.7
Jurassic
Lower/ Early
Pliensbachian
182.7
190.8
Jurassic
Lower/ Early
Sinemurian
190.8
199.3
Jurassic
Lower/ Early
Hettangian
199.3
201.3
Triassic
Upper/ Late
Rhaetian
older
older
Subdivision of the Jurassic system according to the ICS, as of 2017.
Subdivision of the Jurassic system according to the ICS, as of 2017.
Subdivision of the Jurassic system according to the ICS, as of 2017.
Subdivision of the Jurassic system according to the ICS, as of 2017.
Subdivision of the Jurassic system according to the ICS, as of 2017.

Question: What is the Aalenian age?
Answer: The Aalenian is a subdivision of the Middle Jurassic epoch/series that extends from 170.3 Ma to 174.1 Ma.