Definition of Aalenian
: of, relating to, or being a period of the Middle Jurassic lasting from approximately 176 million years ago until 172 million years ago
- This applies particularly to the thickest of the sandstones, the Bearreraig Sandstone of Aalenian to Bajocian age.
- —J. D. Hudson et al., Journal of the Geological Society, September 2011
—
Aalenian
noun-
- Subsequently, during the Aalenian, the motile forms (still present in the water column) had become adapted to life in stressed salinities …
- —Alister James Powell and J. B. Riding, Recent Developments in Applied Biostratigraphy, 2005
