411 REFERENCE · Wiktionary
Ludlovian
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
en :af Ludlow -v- -ian + 1
Proper noun
1
en geology An epoch from 422.9 ± 2.5 to 418.7 ± 2.7 million years ago, a subdivision of the Silurian.
Adjective
-
en geology Belonging to the Ludlow group.
en 1965 Sven Laufeld Collected papers The Ludlovian strata of Gotland are subdivided into six stratigraphical units.