Geology and Sedimentary Rocks Quiz

What event led to the Titanic becoming a potential future fossil?

• It was encased in amber.

• It sank and settled in ocean sediments.

• It was buried in volcanic ash.

• It was covered by a glacier.

What percentage of the Earth's upper continental crust is made up of sedimentary rocks?

• 50%

• 5%

• 15%

• 25%

What is the primary source of clastic detrital sedimentary rocks?

• Glacial movements

• Volcanic eruptions

• Mountain erosion

• Ocean currents

Which of the following is NOT a factor in the formation of sandstone?

• Water movement

• Color

• Composition

• Grain size

What is the main difference between conglomerate and breccia?

• Shape of the particles

• Size of the grains

• Type of minerals

• Color of the rocks

What is the grain size range for sand in sedimentary rocks?

• 0.06 to 2 mm

• 4 to 10 mm

• 2 to 4 mm

• 0.06 to 0.004 mm

Which sedimentary rock is formed from the finest particles?

• Conglomerate

• Breccia

• Sandstone

• Shale

What type of environment is most likely to form a breccia?

• Deep ocean

• Volcanic eruption

• Desert dune

• Calm lake

Which of the following is a characteristic of siltstone?

• Rounded particles

• Fine grains

• Coarse grains

• Angular particles

What is the primary composition of black shales?

• Feldspar

• Olivine

• Organic matter

• Quartz