- The
Gasconadian Stage is the 1st
stage of the
Ordovician geologic period in
North America and of the
Lower Ordovician Canadian Epoch,
coming immediately...
-
exogastric B****leroceratidae,
probably B****leroceras,
around the end of the
Gasconadian through forms like Aphetoceras.
Close coiling developed rather quickly...
-
crossed from the Late Cambrian, Trempealeauan, into the
Early Ordovician,
Gasconadian. (Flower 1964,
Teichert 1988); the
other being Ectenolites. Clarkoceras...
-
diverse ellesmerceratitds of the
Early Ordovician,
Gasconadian, and
those that followed. The
Gasconadian was
dominated to
virtual exclusion by the Ellesmeroceratidae...
-
fossil record. All
known species come from the
Lower Canadian epoch (
Gasconadian) of
North America. The
Dakeoceras s**** is an
endogastric cyrtocone with...
-
known to have p****ed from the Late
Cambrian into the
Early Ordovician (
Gasconadian) and is
found widespread in
North America from the
Tribes Hill of New...
-
stage of the
Upper Cambrian in
North America and is
followed by the
Gasconadian in the
Lower Ordovician.
Together with the
Dresbachian at the bottom...
-
defined it as a four-part system,
divided in
ascending order into the
Gasconadian, Demingian, Jeffersonian, and C****inian
which stands today. The remaining...
-
concave segments.
Sutures straight and transverse.
Early Lower Ordovician (
Gasconadian Stage) of
North America. Kyminoceras.
Generally small,
straight annulated...
- are the
upper part of the
Lower Ordovician and
follow the
Tremadocian (
Gasconadian in
North America)
which is the
lower part.
Either is
followed by the...
