Vocab
What is stratigraphy?
The study of the order and correlation of Earth's rocks
What is Sandstone
Sediment deposited in sandy areas
What is unconformity?
a gap in the geologic record during which either no rocks were deposited or existing rocks eroded.
What is a fossil
remains of animal and plant life preserved in Earth crust
What is shale
Sediment deposited in wet calm enviorments
What is law of fossil succession
A principle that says the same kinds of fossils found in rocks are the same age and the kinds of plants and animals found as fossils change over geologic time.
What Is paleontologist
A scientist who studies fossils
What is an index fossil
a fossil that characterizes a particular period of time
What is Cenozoic
An era when mammals exist- recent animal life
What is geologic time
Time judged by rocks
What is the principle of original horizontality
A theory that says sedimentary layers of rock are flat and horizontal
What is paleontology
The study of fossils
What is a period
a span of time withing an era
What is cementation
Process of cementing smaller particles of rock together
What is uncomfirty
A period of lost time
What is the principle of superposition?
A theory that says sedimentary rocks on the bottom are older than rocks on the top.
What is an era
A long distinct period of time
What is paleozoic?
ancient animal life
What is compaction
That is when water is squeezed out from between rock particles.
Limestone
Sediment deposited
What is uniformitarianism
A theory that says geologic processes observed in the past are the same as those observed today
What is an example of a trace fossil
A footprint
What is Mesozoic?
middle animal life
What is fossil record
All the fossils on earth.
What does paelo mean
Fossil