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Basic properties of limestone
The appearance of limestone can
vary tremendously.
Limestone is calcium carbonate and like any carbonate, it reacts
with acids producing carbon dioxide gas.
Carbon dioxide turns limewater milky.
Because it reacts with acids, it is
bubbles sometimes added to lakes to
of CO2 remove acidity caused by acid rain.…read more

Slide 3

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Limestone, chalk and marble are all forms of calcium carbonate
CaCO3.
Limestone Chalk Marble
Limestone is a sedimentary rock and most of it (especially chalk)
was formed from the remains of tiny sea creatures.
This process took millions of years.
Limestone and chalk often contain fossils.…read more

Slide 4

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Where is limestone
found in the British
Isles?
limestone areas
There are also limestone
cliffs on the coast in the
Vale of Glamorgan…read more

Slide 5

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Sedimentary rocks at Llantwit Major
in the Vale of Glamorgan
Layers of
limestone
and shale
fossils from rocks on left
prepared specimen ­ a Jurassic
fossils in the fallen limestone oyster (180 million years old!)
blocks…read more

Slide 6

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More fossils found in limestone.
A Jurassic ammonite from North
Yorkshire.
180 million years old.
A Silurian gastropod (snail) from
Shropshire.
400 million years old.…read more

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