Q: How are classic sedimentary rocks group?


Read this paragraph and choose the correct option from the provided answers:

Clastic sedimentary rocks are grouped by the size of the sediment they contain. Conglomerate and breccia are made of individual stones that have been cemented together. In conglomerate, the stones are rounded. In breccia, the stones are angular. Sandstone is made of sand-sized particles. Siltstone is made of smaller particles. Silt is smaller than sand but larger than clay. Shale has the smallest grain size. Shale is made mostly of clay-sized particles and hardened mud.

 Choices:

- particle depth

- density

- color

- size of sediment


A:
size of sediment