A diatomaceous earth is ia an example of light-colored sedimentary rock
Explanation:
Composed chiefly of siliceous shells of diatoms are soft and are friable rock this rock often floats on the water just like pumice before the pores are initially filled with water and are usually white.
The silica is formed from the weathered silicate rocks and besides these deposits are geologically young, they have become abundant since the past 50 million years ago.
The wine and beer industry make use of diatomaceous earth also added in toothpaste as it has milder abrasive properties.
