- The
Sandbian is the
first stage of the
Upper Ordovician. It
follows the
Darriwilian and is
succeeded by the Katian. Its
lower boundary is
defined as the...
- The
Llanvirn corresponds to the late Darriwilian. The
Caradoc covers the
Sandbian and the
first half of the Katian. The
Ashgill represents the
second half...
- It is
preceded by the
Dapingian and
succeeded by the
Upper Ordovician Sandbian Stage. The
lower boundary of the
Darriwilian is
defined as the
first appearance...
- and
zircon from the
Brent impact structure, Canada: a Late
Ordovician Sandbian–Katian
boundary event ****ociated with L-Chondrite
parent body disruption"...
-
evidence from the
Sandbian reveals three possible glaciations: an
early Sandbian glaciation, a
middle Sandbian glaciation, a late
Sandbian glaciation. Although...
- Spiriferidae.
Species belonging to the
genus lived from the
Middle Ordovician (
Sandbian)
through to the Late Tri****ic (Carnian) with a
global distribution. They...
- the Gull
River Formation in Kingston, Ontario,
dating from the
latest Sandbian, late Ordovician, c. 454 million
years ago. This site was a warm-water...
- the
Canadian Epoch and take a
tumble following the
early Cincinnatian (
Sandbian) in the
early Late Ordovician, from
which the
group never recovers. It...
- in the
Upper Ordovician of Oklahoma,
United States (Bromide Formation,
Sandbian). L.
retrolatus was
collected from the
Ordovician of
Nevada (Eureka Quartzite...
- −400 — – −390 — – −380 — – −370 — – −360 — O S D L Ll W Lu
Pridoli E M L
Sandbian Katian Hirnantian Rhuddanian Aeronian Telychian Sheinwoodian Homerian Gorstian...
