Vocab
This is a piece of an older rock that becomes a part of a new rock.
What is inclusion.
True or false: The principle of uniformitarianism states that sedimentary rocks are deposited in horizontal layers.
What is false.
The oldest rock layer in an undisturbed rock sequence occurs ____.
What is at the bottom of the sequence.
True or False: The remains of living plants or animals are called fossils.
What is true.
This is the preserved remains or evidence of past living organisms.
What is fossils.
This is a major division of time that is a subdivision of an eon and is itself subdivided into periods.
What is an era.
The principle of superposition can be used to determine.
What is the relative age of these rock layers.
A ____ forms as part of the fossilization process when an organism dies and is rapidly buried in soft sediment such as mud, sand, or volcanic ash, which protects it from decay and scavengers.
This is the principle that in undisturbed rock layers, the oldest rocks are on the bottom.
What is superposition.
This is a unit of time equal to a thousand million years.
What is an eon.
The principle of _____ states that, in an undisturbed sequence, the oldest rocks are at the bottom of the sequence and successive layers are younger than those below them.
What is superposition.
A _____ form when an organism, such as a shell, bone, or plant, becomes buried in sediment like mud, sand, or clay.
What is a mold fossil.
This is a fossil representative of a species that existed on Earth for a short length of time, was abundant, and inhabited many locations.
What is index fossils.
This is a major division of geological time that is a subdivision of an era and is itself subdivided into epochs
What is a period.
Determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called ____.
What is relative age dating.
An _____ is a type of trace fossil that records the external form of an organism rather than its body itself.
What is an imprint fossil.