If the gravestone is a carbonate rock like limestone the rain will eventually erode the stone away as rain water is slightly acidic. Old tombstone are often illegible because of this as all the raised lettering is washed away. Alternately if the rain seeps into any cracks and freezes the stone will split or pall.
Water, rain. Also wind.
acid rain
Rocks can be weathered by the wind or rain, or if water gets in some of the cracks, it would break apart
Weathers boiling point?.... if you mean rain, its water so .. 100 degrees?..
Limestone weathers most rapidly when exposed to acid rain due to its high calcium carbonate content which reacts with acidic water to form soluble calcium bicarbonate, leading to its dissolution.
It lands on the rocks and dissolves them.
carbon dioxide: when it mixes with rain& water will create carbonic acid rain which weathers marble and limestone.so carbonic acid weathers marble and limestone.
Evaporated water forms again clouds and rain.
Simply rain, gravestones are frequently made of marble and marble is etched by rain.
Carbon mixes with the rain water and when it falls, it wears out rocks. So it happens when the rain water mixes with the carbon from the air.
A flood happens when water over flows from to much rain and over flows the city/village/etc........ also, when it rain for so long and rain so hard
It chemically weathers them, slowly dissolving their outer surfaces.