It's the principle that states that the present is key to the past.
What is uniformitarianism?
The youngest layer in the outcrop.
What is layer 4?
What is a half-life?
The longest unit of the geologic time scale.
What is an eon?
It is a fossil that is used to correlate rock layers.
What is an index fossil?
A boundary that occurs where two tectonic plates slide past each other.
What is a transform boundary?
They are older rock fragments found in a rock layer.
What are inclusions?
Older than layers E and F but younger than layers D, C, and B.
What is intrusion A?
The number of half-lives that have passed if 25% of a radioactive parent element is left.
What is two?
The shortest unit of the geologic time scale.
What is an epoch?
A dinosaur bone is an example of this hardened fossil.
What are petrified remains?
A boundary that occurs where two plates are moving away from each other.
What is a divergent boundary?
What is the principle of superposition?
It is a fault, and the youngest feature in the outcrop?
What is G?
The half-life of carbon-14.
What is 5730 years?
The name of the earliest era, it means "old life."
What is the Paleozoic?
The type of convergent boundary that occurs when one of the tectonic plates is forced under the other.
What is a subduction convergent boundary?
It is the principle that states that faults or intrusions are always younger than the rock layers that they cut across.
What is the principle of cross-cutting relationships?
It's the principle that tells you that the intrusion is the youngest feature of the outcrop.
What is the principle of cross-cutting relationships?
The percentage of daughter element after three half-lives.
What is 87.5%
The current era, it's name means "recent life."
What is the Cenozoic?
A prehistoric arrowhead and dinosaur footprints are examples.
What are trace fossils?
The type of convergent boundary that occurs when both tectonic plates are pushed upward.
What is a collision convergent boundary?
It states that sedimentary rocks are deposited in a horizontal or nearly horizontal layers.
What is the principle of original horizontality?
From oldest to youngest, it is the correct order of the features in this outcrop.
What is B, C, D, A, E, F, G?
The age of the Earth as determined by radiometric dating using uranium.
What is 4.6 billion years?
It means "middle life" and is known as the age of the dinosaurs.
What is the Mesozoic?
They are trace fossils of rocks that dinosaurs swallowed to aid digestion.
What are gastroliths?
The type of convergent boundary that occurs where an oceanic plate meets a continental plate.
What is a subduction convergent boundary?