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