恐竜王国 繁栄の秘密 18分版 | フロンティア | NHK
say
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why did they take over the Earth why did
they exist for 170 million years on the
the Earth and they were so successful
and that brings us back to the origin
because they must have had some very
special characteristics that enabled
them to dominate the Earth for so long
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something’s going on here it’s more of
an event than a long
process I think it all comes together
ultimately in dinosaurs they get the
whole package everything
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m
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spe
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for
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for for
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right okay I’ll just knock a little
piece of this
off this all these Red Rocks here are
What’s called the Mercier mudstone group
the red color indicates that it was
deposited on land where the tiny amounts
of iron in the the the mudstones have
been oxidized effectively they’ve gone
rusted they evidence that this was was
dry
land no fossils cuz it was a very harsh
environment
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and here we
are got red muds
underneath from very arid and
environment and as you go up you can see
that it starts to get more and more
green bands and the green
bands are where the iron is not so
rusted as it is in the red bands
oh oh this
is this is very very interesting this
is uh so going but the fact that you got
one doing that you got this one doing
that you got another one doing that
they’re all at different
angle these are things that are moving
under their own steam so they’re quite
clearly yes animal life and there’s a
lot of it and I think they’re probably
something like snails that would have
been crawling across the mud of a
Shallow
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Lake and that tells us there’s a bit
more water around lots more water
perhaps, 1500 mm of rain a
year and it just been builds this
picture of this was a major climatic
change where the rainfall
increased tenfold really over very very
large areas
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no
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the climate during the Trias changed
from being really very dry to being uh a
lot more humid than we expected
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we are here in clearwell caves in the in
The Forest of Dean these are quite big
caves and they’re quite
extensive
Nas caves that had formed in the
Triassic
a cave forms within a landscape you have
water and you need a lot of rain to form
decent size
caves and so at times you would have had
huge amounts of water actually pouring
through these caves and making them
bigger
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these caves are filled with iron because
of the Rocks nearby that the streams
were flowing off and carrying all this
iron rich sediment into the
caves and in similar caves about 50 60
kilometers away pieces of this iron ore
have been
found in late Triassic
rocks there’s still
some discussion as to where the iron
might have come from but I’m I’m quite
convinced it was coming from above it
was streams flowing into the caves
carrying this iron uh Rich
mud this is this was a lot of water
coming through here at some point during
the Triassic
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so it would have
been a very very Dynamic time before and
after it would have been a bit
monotonous it would have been kind of
dry and Dusty and probably quite
windy there would have been lot more
frequent rainstorms
and uh much more extensive river systems
and much bigger and deeper lakes and it
was just a a much easier environment for
life on land to
exist so the name CP well we came up
with it it happened in the caran and
within the
caran
CP kanini for
so I announced our Discovery so we got a
climate change and this was quite
new and I thought I was in with a good
chance of winning what was called the
president’s award which was a a prize
given by the president of the
association for the best talk given by
somebody who was under 30 and I was just
28 at the time so I gave my talk um and
uh with alist as a sort of co-author
and I I was very pleased with the way it
went and then the president
himself sort of declared that no he
wasn’t convinced at all how could it
possibly be rigning more
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not it not been considered as evidence
for for climate change because everybody
was set in a mindset that uh the triacid
was very very
arid it was very arid because yeah the
tric period was very arid because nearly
all of the Continental masses which
today are scattered you know around the
globe were all in one super continent
called Pangia
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IM
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C
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so we published those three papers and
then nothing almost
nothing yes we we were I was I was a bit
disappointed and aliser you know we were
both a bit
disappointed and I felt that I’d
done all that I could do within sort of
my kind of technical limits and and
since nobody else seemed to be terribly
interested so we moved on to other
things
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Prof
Feld
fore spee
son
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Pres
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マイケル・ベントン（ブリストル大学）、ピエロ・ジャノーラ（フェラーラ大学）、マイケル・シムズ（北アイルランド国立博物館）、ジョン・ハッチンソン（ロイヤルベテリナリー大学）、冨松由希（福岡大学）、久保泰（早稲田大学）、 語り：オダギリジョー
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