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geology
F3 time and change
flora
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Created by
Isa B-T
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Cards (15)
In the
Devonian
period forests began to appear as plants grew
trunks
,
leaves
,
roots
and
seeds
for the first time
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Plants appeared in the oceans (Precambrian)
630
million years ago
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Plants are often washed into
lakes
or the
sea
where preservation chances are
better
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Plants from
boreal
,
temperate
or
tropical
biomes
Can be determined
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Pollen
Good
paleoenvironmental indicators
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Pollen
Can also be used to identify a species of
plant
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Leaves, bark and stems
Preserved and can be used to identify
specific
species
of plants
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Pollen is very
abundant
and
widespread
but it is so small that a high powered
microscope
is needed to see it
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Terrestrial
environments are poor location for fossilisation
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Some ancient millipedes began to consume the early plants in the
Silurian
era
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Pollen
Small
grains
that are
resistant
, which is better for
preservation
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Primitive plants colonised the land in the
Ordovician
period, they were very
small
and had no
root
structure
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Flora
Includes
ferns
,
leaves
,
roots
and
trunks
; they are
body
fossils
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Leaves, bark and stems
Good
paleoenvironmental indicators
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300
million years ago tropical rainforests began to grow and were turned into
coal
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