- The
Ordovician (/ɔːrdəˈvɪʃi.ən, -doʊ-, -ˈvɪʃən/ or-də-VISH-ee-ən, -doh-, -VISH-ən) is a
geologic period and system, the
second of six
periods of the...
-
through time. Four of
these peaks were
statistically significant: the
Ashgillian (end-Ordovician), Late Permian,
Norian (end-Tri****ic), and Maastrichtian...
-
episode at c. 440 Ma, is
recorded in Late
Ordovician strata (predominantly
Ashgillian) in West
Africa (Tamadjert
Formation of the Sahara), in
Morocco (Tindouf...
- spjeldnaesi. Sp nov
synonym Reed
Ashgillian Scotland
transferred to
Similodonta in 1964
Nucula magna. Sp nov
synonym Lamont Ashgillian Scotland
transferred to...
-
Ulrich Ashgillian Upper Richmond Group,
Minnesota USA
transferred to
Similodonta in 1964
Tellinomya recurva. Sp nov
synonym Lamont Ashgillian Upper Richmond...
- N. Kjellesvig-Waering,
based on a well-preserved
prosoma (head) from
Ashgillian-age (Late Ordovician)
deposits alongside the Ohio
River road (U.S. Route...
-
lived in the
Ordovician period, from the
Tremadocian age
until the
Lower Ashgillian age (488.3-449.5
million years ago).
These arthropods were a low-level...
- and X.C. Yang.
Community paleoecology as a
geologic tool: the
Chinese Ashgillian-Eifelian (latest
Ordovician through early Middle Devonian) as an example...
- age in the
southwest and in the far
northeast of the county. It is the
Ashgillian age
Nantmel Mudstones which form the
rocky coast between Gwbert and Aberporth...
- age. Mudstones,
siltstones and
sandstones of Arenigian,
Llanvirnian and
Ashgillian age
occur in a
broad band from the
northeast through the
centre of the...
