Cards in this guide (16)
According to the principle of cross-cutting relationships an intrusive rock body is
Younger than the rock it intrudes into
In what type of rocks would geologists most likely find evidence of past life forms
What are eras divided into
The constituent time segments are epochs and periods, which are
further divided into ages.
What do you call mountains formed by blocks of crust moving along a fault
What is fossil succession
Fossil organisms succeed one another in a definite and
determinable order, and therefore any time period can be recognized
by its fossil content.
-organisms evolve, and organisms become extinct.
Proposed by William Smith late 1700's and early 1800's
Radiometric dating is possible because the rates of decay of radioactive isotopes
A break that separates older metamorphic rocks form younger sedimentary rocks immediately above them is a type of unconformity called an
A potassium 40 sample starts with 50 atoms and 1.25 billion years later there are 25 atoms What is the half life of potassium 40
1.25 billion years: 25/50 or half the original atoms have
disintegrated in 1.25 billion years, and that is the definition of
half life.
What is the name of the doctrine that states the physical chemical and biological laws that operate today have also operated in the geologic past
The major forces that form folded mountains are
Which type of geologic event has to occur to create an angular unconformity
The folding or tilting of rocks, followed by renewed deposition,
has to occur to create an angular unconformity.
What does the radiometric date of metamorphic rock most likely represent
heated during metamorphism
Which item could be dated using radiocarbon dating
A 60,000 year old mammoth bone.
Which is a true statement about the process of accretion
It enlarges continental landmasses and forms mountains along the
edges of continents.
The boundaries of history of eras are marked by great worldwide changes in
The boundaries of history of eras are marked by great worldwide
changes in continental coastline
What is the continental crust like in young mountainous regions
