Chapter 7 Reading Quiz

Rocks formed dominantly from the calcium carbonate shells of marine organisms are classified as ___ and called ___

biochemical; limestone

Formation of a clastic sedimentary rock involves five stages. Which of the following describes lithification?

compaction and cementation of loos particles to form solid rock

Ripple marks, dunes, and cross bedding are useful indicators of

current direction

A distinctive sequence of strata that can be traced across a large region is called a

formation

Which of the following is NOT one of the major classes of sedimentary rocks?

intrusive (ARE: clastic, biochemical, chemical, organic)

Red beds composed of poorly sorted sandstone and conglomerate, cemented by rustlike iron-oxide minerals, most likely formed in what depositional environment?

mountain front alluvial fan

Ripple marks, cross beds, graded beds, and mud cracks are all examples of

sedimentary structures

As sediment is transported downstream, away from its point of origin, the particles become

smaller, rounder, better sorted, dominantly resistant minerals

Which of the following is NOT a useful indicator of depositional environment?

source rocks (ARE: fossils, sediment composition, particle sorting, sedimentary structures)

Where do sedimentary rocks form?

upper crust