Lab Textbook Reading Review Questions

(Q005) The principle of inclusions states that

a sedimentary rock must be younger than the clasts that it contains.

(Q004) The principle of superposition can be used to determine the relative ages of all of these except

folded sedimentary rocks.

(Q006) If a fault offsets a sequence of sedimentary rocks, what must be true about the fault?

It is younger than the rocks based on the principle of cross-cutting relationships.

(Q009) A nonconformity occurs when

a series of sedimentary rocks sits upon eroded igneous or metamorphic rocks.

(Q012) The longest interval of geologic time is a

eon

(Q007) If a sequence of sedimentary rocks has been folded and is now vertical,

graded bedding can help determine whether some beds are older or younger than the beds next to them.

(Q008) A disconformity occurs when

there has been some uplift and erosion but no folding between deposition of rocks above and below the disconformity.

(Q003) An angular unconformity is evidence that

there is an incomplete geologic record preserved in an area.

(Q010) In order for a fossil to be used as an index fossil, the species must have existed for a

very short span of geologic time and lived throughout the world.

(Q001) The term relative age refers to

whether a feature is older or younger than another.