모래나 석영 입자가 퇴적되어 굳어진 퇴적암의 일종.
A sedimentary rock composed primarily of sand-sized silicate grains, such as quartz or feldspar, held together by a mineral cement.
예문:
"The ancient temple was carved directly into the red sandstone cliffs."
"Geologists studied the layers of sandstone to understand the environmental history of the region."
"Because it is relatively soft, sandstone has been a popular building material for centuries."