What is Gravestone ?

Gravestone  A stone on a tombstone that indicates the place where the deceased is buried. It usually contains the name, date of birth and death of the deceased. For a complete definition of the tombstone, see English Language Learner's Dictionary: Tombstone.

Gravestone provide a useful way to observe and measure the weathering of different types of rocks over a relatively long and easy-to-measure period of time (100 to 300 years or more).

In the UK, Gravestone ,tombstones can be seen everywhere, made of various local and imported natural stones. These tombstones provide information on the performance of these materials under different climatic conditions and different levels of air pollution. Using this information may help assess the relative durability of different types of natural building materials.

The weathering of the tombstones in St. Pancras Garden may be mainly due to chemical weathering caused by severe air pollution in London, especially near Euston Road, where there are a lot of car exhaust, containing sulfur oxides and nitrogen oxides.