Vocab
The preserved remains of something that was once living.
A fossil.
Where are older rock layers always located?
Towards the bottom
This states that a crack or break in rock must be younger than the rock layer it cuts through
cross cutting
4.6 billion years
Iceland - Name the Boundary
divergent
This is a break or crack in a layer of rock.
Fault
If a fossil is found in a particular rock layer, what can we say about both the fossil and the rock layer?
The formed at the same time.
Another name for extinction #3 - 96 % marine and 70% terrestrial vertebrate life
"The Great Dying"
California- San Andreas Fault - Name the Boundary
Transform Boundary
states when a fault cuts through a rock layer or when magma intrudes other rocks and crystallizes, we can assume that the fault or intrusion is younger than the rocks affected
cross cutting relationships
a very large igneous intrusion extending deep in the earth's crust
batholith
The four eons in order
Hadean, Archaen, Proterozoic and Phanerozoic
Hawaiian Islands - Name the Boundary
Hot Spot
indicates that during the pause in deposition, a period of deformation (folding or tilting) and erosion occured
a sheet of igneous rock intruded between and parallel with the existing strata.
sill
place that drives plate motion
convection currents
Name the time? Formation of the Earth and Moon
4.6 billion years
establishing the equivalence of rocks of similar age in different areas
correlation
sills, dykes and batholiths
exists between sedimentary rocks and metamorphic or igneous rocks when the sedimentary rock lies above and was deposited on the pre-existing and eroded metamorphic or igneous rock.
non conformity
Scientists measure the radiocarbon in the fossil to determine its age
¡Rock A is OLDER than Rock B. An actual age in years is not determined.
What are these examples of?
Absolute Age vs Relative Dating
Name the time: "Lucy" early hominids
4 million years