This quiz is about Rock & Fossil records which helps paleontologists, archaeologists, and geologists place important events and species in the appropriate geologic era. It is based on the Law of Superposition which states that in undisturbed rock sequences the bottom layers are older than the top layers.
What is the breakdown of unstable isotopes into stable isotopes of other elements called?
How far back in time can geologists study the history of the earth?
16 billion years
46 billion years
4.6 billion years
160 billion years
What is the largest division of time?
What is the science that combines uniformitarianism and catastrophism?
What forms when sediment fills in a cavity left by a dead organism?
Catastrophism is the idea that geologic change occurs suddenly.
An index fossil is used to establish the age of a rock layer because the fossil is distinct, abundant, and widespread and the species that formed that fossil existed for only a short span of geologic time.
Fossils that are found in one distinct layer are referred to as...