Definitely Sand stone!
Calcium based rocks like chalk, limestone and marble are some examples of rocks easily erroded by acid rain.
acid rain
If the rock is a limestone it will react with it chemically.
Acid rain can damage rock or stone by dissolving the minerals that hold the rock or stone together, leading to erosion and weakening of the material. Over time, the surface of the rock or stone can become pitted and rough due to the chemical reactions with the acid in the rain.
The harmful gases produced from use rise and produce acid rain, the rain then falls. When the acid rain touches the rock it starts to break down the molecules in the rock, causing cracks to appear, leading to bits falling of. This called eroding of the rock.
An acid rain contain acids as HNO3, H2SO4, HCl.
First, erosion is a noun and does not have tenses. The matching verb is "to erode". The past tense is eroded. Acid rain slowly eroded away the sandstone statues at the capitol.
Melting of rock or erosion
Limestone.
limescale
A powerful movement the USA government is the Clean Water Act
in disinagrates deppending wat kind of rock it is \