Types of Preservation
Impression in a rock.
What is a mold?
Page 331
Faults that cut across existing rock.
What is cross-cutting relationships?
Page 339
Means equal from Greek.
What is isos?
page 346
What is radiocarbon dating?
Page 349
Fossils that are so small they can't be seen.
What is microfossils?
Page 329
A mold that is filled with sediment.
What is a cast?
Page 331
Continuous sheets in all lateral directions.
What is lateral continuity?
Page 338
Means place from Greek.
What is topos?
Page 346
An important Radioactive isotope of carbon?
What is C-14?
Page 348
Becomes a fossil.
What is dead organisms?
Page 329
Replicas of organisms from minerals.
What is mineral replacement?
Page 330
Rocks deposited in horizontal layers.
What is original horizontality?
Page 338
The smallest part of element.
What is an atom?
Page 346
Decays at a constant rate.
What is Radioactive isotopes?
Page 348
Preserved evidence of activity.
What is a trace fossil?
Page 331
A piece of an older rock that becomes part of a new rock.
What is an inclusion?
Page 339
Time required for half of the parent isotopes to decay into daughter isotopes.
What is half-life?
Page 347
The age of Earth.
What is 4.56 billion years old?
Page 350
Fossilized carbon outline of an organism.
What is a carbon film?
Page 330
The principle that when undisturbed, oldest rock layers are on bottom.
What is a superposition?
Page 338
The process that an unstable element changes into a stable element.
What is radioactive decay?
Page 346
The half-life of Uranium-238.
What is 4.5 billion years?
Page 350