MHS Geology - Module 17 - Fossils & Rock Record

In what type of rocks are most fossils found?

According to the principle of inclusions, any rock fragments included in a rock layer must be

The physical, chemical, and biological laws that operate today have also operated in the past. This principle or law is

The radiometric date of a metamorphic rock most likely represents when the rock was

Current era which means "recent life"

Radiocarbon dating could be used to date which of the following

A record of Earth's history that includes both geologic events and major life developments is the

The dating process that places geologic events in proper sequence is referred to as

Era which means "middle life"

Radiometric dating does not usually work with sedimentary rocks because they

What principle helps match rock layers on opposite sides of a canyon carved by a river?

What is a rock or sediment layer that serves as a time marker in the rock record?

Which of the following is important if an organism is to become a fossil?

Fossils are the

Oldest eon in Earth's history

In general, the law of superposition states that in an undeformed sequence of sedimentary rock

Radiometric dating is possible because the rates of decay of radioactive isotopes

Current eon which means "visible life"

Using radioactive isotopes to calculate the ages of rocks and minerals is a procedure called

The task of using fossils to match up rocks of similar ages in different areas is called

Which geologic events have to occur to create an angular unconformity?

Era which means "old life"

The time it takes for 50% of the original radioactive isotope to decay to a stable isotope is called what?

Which of the following must be true for a fossil organism to be useful as an index fossil?

Unofficial name for 90% of Earth's history made up of the first 3 eons combined

Radioactivity is produced when unstable nuclei

According to the principle of cross-cutting relationships, an intrusive rock body is

A fly trapped in amber would be an example of what type of fossil?

Which of the following are ways to determine the absolute age of a rock?

What principle states how sedimentary rocks are initially deposited?

Which of the following lists the divisions of time in order from longest to shortest?

What determines the type of fossil that is formed?

What represents a gap in the rock record caused by weathering and erosion?

The radiometric dating of an igneous rock provides

The footprints of a dinosaur are an example of what type of fossil?