What is the general term for sedimentary rock formed from cemented fragments?

What is the general term for sedimentary rock formed from cemented fragments?

• A. Bioclastic
• B. Organic
• C. Chemical
• D. Clastic

Answer: (D)

Clastic sedimentary rocks form from fragments of other rocks that have been weathered, transported, deposited, and then cemented together. When a rock is described as formed from cemented fragments, it fits this clastic category because the key feature is that it’s made of pieces (clasts) held together by mineral cement. Other sedimentary rocks form by different processes: chemical rocks come from minerals that precipitate out of solution, and organic rocks come from accumulated remains of organisms. Bioclastic is a type of clastic rock consisting specifically of formerly living material, but the broad term for rocks made of cemented fragments is clastic. Examples include sandstone and shale.

Clastic sedimentary rocks form from fragments of other rocks that have been weathered, transported, deposited, and then cemented together. When a rock is described as formed from cemented fragments, it fits this clastic category because the key feature is that it’s made of pieces (clasts) held together by mineral cement.

Other sedimentary rocks form by different processes: chemical rocks come from minerals that precipitate out of solution, and organic rocks come from accumulated remains of organisms. Bioclastic is a type of clastic rock consisting specifically of formerly living material, but the broad term for rocks made of cemented fragments is clastic. Examples include sandstone and shale.