Most studies assume that differences in the linear regression equations between sites represent differences in the influence of different pollution histories.
Marble gravestones weathering.
Marble gravestones for example are expected or rather assumed to decay mainly by dissolution by acidic rainfall remembering that natural rainfall is slightly acidic anyway being a weak carbonic acid with a ph of 5 6.
The four factors are.
To a geologist a gravestone can offer information other rocks can t.
Weathering processes on headstones and monuments alison tymon march 2012 weathering is defined as the breakdown of rock in situ that is without being moved.
Nevertheless for some families marble is still the stone of choice because of its natural beauty.
Others are weathering or semi weathering meaning they will change color usually to shades of brown when used.
They are both very similar in a lot of ways.
Material the gravestone is made from environment the gravestone is in process by which the gravestone is weathered form of the weathering on the gravestone.
Quartzite also has a pattern similar to marble which is why many choose marble over granite even though marble doesn t last as long.
But for the most part quartzite is harder and denser since it is made of quartz is much more resistant to chemical physical weathering.
It is customary to associated particular types of gravestones or environments with particular weathering processes.
Gravestones and monuments are generally custom fabricated out of large stones.
Following the idea that marble gravestones would weather mainly by dissolution it is thought that weathering loss would be linear.
One project is using gravestones to better understand how the elements particularly acid rain are weathering rocks around.
Weathering processes depend upon the pres ence of water the temperature the mineral composition of the rock and its chemical com position.
How to clean marble headstones.
Physical weathering is the toll put on rocks by.
Are barely legible because acid rain created by factory pollution has dissolved a lot of the calcite in the limestone and marble gravestones.
Headstones are subjected to weath.
Marble tombstones aren t as popular today as granite or bronze gravestones because marble is highly vulnerable to stains and damage.