Press play on the animations below to see
different ways in which limestone is weathered.
Unlike some other forms of limestone, carboniferous limestone is very hard. It has been
as a building material for thousands of years.
Carboniferous limestone was even
used to build the Great Pyramid
of Giza, which is the only wonder
of the ancient world still standing.
over 4,500 years old.
This gravestone is also
made out of carboniferous limestone. It
has only been around for 300 years – but
it’s not in as good shape. There is even a
right through the middle.
Carboniferous limestone is made up of calcium carbonate (CaCO3). Calcium carbonate is
vulnerable to chemical solution, a form of chemical weathering caused by rainfall.
When rainwater absorbs carbon dioxide,
carbonic acid (H2CO3). This is a weak acid
which over time will dissolve limestone to
produce various exotic features. This
process is known as chemical solution or
The Main Limestone Feature – Identify,
Diagrams and explanations...
• Swallow Holes
• Limestone Pavement (Clints and Grykes)
• Dry Valleys
• Gorge (collapsed Cavern)
• Doline/ Sink Hole
• Spring/ Resurgence
• Stalactites and Stalagmites (Pillars)
• Devise a 10 question quiz for the class on
Limestone features. All questions must be
True/ False answers.....