Identifying Grain Sizes in Clastic Sedimentary Rocks

What is the primary basis for classifying clastic sedimentary rocks?

• Chemical composition

• Grain size

• Color of the rock

• Location found

Which of the following items would most likely represent gravel-sized particles?

• Sand

• Popcorn

• Sprinkles

• Flour

What grain size is approximately the same as flour?

• Sand

• Gravel

• Silt

• Clay

What type of rock forms from the lithification of sand?

• Shale

• Conglomerate

• Sandstone

• Limestone

Which sedimentary rock forms from rounded gravels?

• Limestone

• Sandstone

• Shale

• Conglomerate

What type of rock is formed from clay-sized particles?

• Limestone

• Sandstone

• Conglomerate

• Shale