- spiral, and even a star-shaped form. The
oldest rudists are
found in late Jur****ic
rocks in France. The
rudists became extinct at the end of the Cretaceous...
- and seas were po****ted with now-extinct
marine reptiles, ammonites, and
rudists,
while dinosaurs continued to
dominate on land. The
world was
largely ice-free...
-
Ordovician period, 488 to 443
million years ago. One
bivalve group, the
rudists,
became major reef-builders in the Cretaceous, but
became extinct in the...
-
relatives of
Megalodon such as
Pachyrisma grande were
closely related to the
rudists. †Megalodon hungari**** †Megalodon
longjiangensis †Megalodon rostratiforme...
- bryozoa, and
parts of the s**** of some
bivalves (such as
oysters and
rudists).
Calcite is
found in
spectacular form in the
Snowy River Cave of New Mexico...
- decline. More
modern teleost fish
begin to appear. Ammonoids, belemnites,
rudist bivalves, sea
urchins and
sponges all common. Many new
types of dinosaurs...
-
Formation is a
geologic formation in Jamaica. It
preserves fossils such as
rudists,
echinoids and
corals from the
Santonian stage of the
Cretaceous Period...
- plesiosaurs,
several groups of mammals,
ammonites (nautilus-like mollusks),
rudists (reef-building bivalves), and
various groups of
marine plankton. In all...
-
lagoonal to
estuarine environment and
contain many
fossil fish,
flora and
rudists,
typical reef-building
organisms of the Cretaceous. The
formation rests...
-
order of
bivalves known as
rudists, were
major reef-building
organisms during the Cretaceous. By the mid-Cretaceous,
rudists became the
dominant tropical...
