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Definition of devonian
Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of devonian is as below...
Devonian
(a.) Of or
pertaining
to Devon or
Devonshire
in
England;
as, the
Devonian
rocks,
period,
or
system..
Lern More About Devonian
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Lepidodendron
::
Lepidodendron
(n.) A genus of
fossil
trees of the
Devonian
and
Carboniferous
ages,
having
the
exterior
marked
with
scars,
mostly
in
quincunx
order,
produced
by the
separation
of the
leafstalks..
Gyracanthus
::
Gyracanthus
(n.) A genus of
fossil
fishes,
found in
Devonian
and
carboniferous
strata;
-- so named from their
round,
sculptured
spines..
Favosites
::
Favosites
(n.) A genus of
fossil
corals
abundant
in the
Silurian
and
Devonian
rocks,
having
polygonal
cells with
perforated
walls..
Schoharie Grit
::
Schoharie
grit () The
formation
belonging
to the
middle
of the three
subdivisions
of the
Corniferous
period
in the
American
Devonian
system;
-- so
called
from
Schoharie,
in New York, where it
occurs.
See the Chart of
Geology..
Chemung Period
::
Chemung
period
() A
subdivision
in the upper part of the
Devonian
system
in
America,
so named from the
Chemung
River,
along which the rocks are well
developed.
It
includes
the
Portage
and
Chemung
groups
or
epochs.
See the
Diagram
under
Geology..
Dalmania
::
Dalmania
(n.) A genus of
trilobites,
of many
species,
common
in the Upper
Silurian
and
Devonian
rocks..
Cliff Limestone
::
Cliff
limestone
() A
series
of
limestone
strata
found in Ohio and
farther
west,
presenting
bluffs
along the
rivers
and
valleys,
formerly
supposed
to be of one
formation,
but now known to be
partly
Silurian
and
partly
Devonian..
Hamilton Period
::
Hamilton
period
() A
subdivision
of the
Devonian
system
of
America;
-- so named from
Hamilton,
Madison
Co., New York. It
includes
the
Marcellus,
Hamilton,
and
Genesee
epochs
or
groups.
See the Chart of
Geology..
Cephalaspis
::
Cephalaspis
(n.) A genus of
fossil
ganoid
fishes
found in the old red
sandstone
or
Devonian
formation.
The head is
large,
and
protected
by a broad
shield-shaped
helmet
prolonged
behind
into two
lateral
points..
Trilobite
::
Trilobite
(n.) Any one of
numerous
species
of
extinct
arthropods
belonging
to the order
Trilobita.
Trilobites
were very
common
in the
Silurian
and
Devonian
periods,
but
became
extinct
at the close of the
Paleozoic.
So named from the three lobes
usually
seen on each
segment..
Coccosteus
::
Coccosteus
(n.) An
extinct
genus of
Devonian
ganoid
fishes,
having
the broad
plates
about the head
studded
with
berrylike
tubercles..
Corniferous
::
Corniferous
(a.) Of or
pertaining
to the
lowest
period
of the
Devonian
age. (See the
Diagram,
under
Geology.)
The
Corniferous
period
has been so
called
from the
numerous
seams of
hornstone
which
characterize
the later part of the
period,
as
developed
in the State of New
York..
Paleozoic
::
Paleozoic
(a.) Of or
pertaining
to, or
designating,
the older
division
of
geological
time
during
which life is known to have
existed,
including
the
Silurian,
Devonian,
and
Carboniferous
ages, and also to the life or rocks of those ages. See Chart of
Geology..
Dinichthys
::
Dinichthys
(n.) A genus of large
extinct
Devonian
ganoid
fishes.
In some parts of Ohio
remains
of the
Dinichthys
are
abundant,
indicating
animals
twenty
feet in
length..
Devonian
::
Devonian
(n.) The
Devonian
age or
formation.
Goniatite
::
Goniatite
(n.) One of an
extinct
genus of
fossil
cephalopods,
allied
to the
Ammonites.
The
earliest
forms are found in the
Devonian
formation,
the
latest,
in the
Triassic..
Neuropteris
::
Neuropteris
(n.) An
extensive
genus of
fossil
ferns,
of which
species
have been found from the
Devonian
to the
Triassic
formation..
Pterichthys
::
Pterichthys
(n.) A genus of
Devonian
fossil
fishes
with
winglike
appendages.
The head and most of the body were
covered
with large bony
plates.
See
Placodermi.
Genesee Epoch
::
Genesee
epoch () The
closing
subdivision
of the
Hamilton
period
in the
American
Devonian
system;
-- so
called
because
the
formations
of this
period
crop out in
Genesee,
New
York..
Cauda Galli
::
Cauda galli () A
plume-shaped
fossil,
supposed
to be a
seaweed,
characteristic
of the lower
Devonian
rocks;
as, the cauda galli
grit..
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