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Definitions of
Silurian
:
noun
:
from 425 million to 405 million years ago; first air-breathing animals
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Alternative Terms
palaeozoic
sedimentary-rock
igneous
metamorphic-rock
silurian-period
graptolite
geologic-timescale-table
lithofacies-geology
organism
continents-evolution-of
paleogeography
zonal
prevailing-westerly
monsoon
laurentia
paleoceanography
glaciation-3
coarse
siliclastic
paleoclimatology
nearshore
annelid
arthropod
paleobotany
paleoecology
alga
cyanobacteria
sponge
stratum
clam
bryozoa
crinoidea-2
ostracoda-2
trilobita
boney
spiny
anaspida
heterostraci
osteichthyes
period
silurian-silurian-period
ordovician
annum-2
devonian
geology
rock
extinction-event
reef
gotland
sweden
roderick-murchison
wales
1830s-2
celts-4
silures
adam-sedgwick
cambrian
1835
charles-lapworth
joachim-barrande
bohemia
edward-forbes
llandovery-epoch
wenlock-epoch
ludlow-epoch
pridoli
faunal-stage
index-fossil
ludlow-group
ludfordian
gorstian
homerian
sheinwoodian
telychian
aeronian
rhuddanian
ontario
alexandrian
gondwana
glacier
unconformity
craton
continental-drift
equator
supercontinent
euramerica
caledonian-orogeny
evaporite
teays-river
panthalassa
proto-tethys-ocean
paleo-tethys-ocean
rheic-ocean
iapetus-ocean
avalonia
ural-ocean
earth-disambiguation
greenhouse
south-pole
coquina