Fossils
This law helps scientists determine the age of fossils, relatively speaking.
What is the Law of Superposition?
a scientist who studies the Earth’s crust as well as the processes and history that shaped it
Who is a geologist?
Proposed the Continental Drift Theory
Who is Alfred Wegener?
Engine that moves the plates
What are Convection Currents?
Preserved remains or traces of animals, plants, and other organism from the remote past
What are Fossils?
Special fossils that indicate to geologists the boundaries in geological time.
What are Index Fossils?
Like saying you’re relatively younger than your grandfather.
What is Relative Age?
South America and Africa, fit together like puzzle pieces is this type of supporting evidence.
What is Continental Fit?
Plates do one of 3 things.
Converge
Transform
What is diverge?
The coal fields in North America and Europe matching up is this type of evidence that supports Wegener.
What are Landforms and Rock Layers?
Fossils are found here because sedimentary rocks form at low temperatures and pressure.
What are Sedimentary Rocks?
This era contained
Dinosaurs
Small mammals
Birds
Conifers and flowering plants
What is Mesozoic Era?
Began to break apart about 175 million years ago
What is Pangaea?
Plates glide over the plastic-like and less ridged layer of Earth
What is the asthenosphere?
This crust consists mainly of basalt
What is Oceanic Crust?
Leaves a carbon film on the sedimentary rock
What is Carbonization?
Currently in this Era and development of:
Large mammals
Human beings
What is Cenozoic Era?
Wegner’s Supporting Evidence
Fossil evidence
Continental Fit
Glacial evidence
What are Landforms & Rock Layers?
This crust is mostly granite rock
What is Continental Crust?
Uses the decay of radioactive elements to find this of a rock or fossil
What is Absolute Age?
Result in organic material converting into stone or a similar substance
What is Petrification?
Broken into 3 parts Hadean, Archean, and Proterozoic
What is the Precambrian?
show the ice flowing from the glaciers came from a single point
What are Striations?
Boundary that creates a volcanic arc of islands and Subduction zone
What is a converging oceanic/oceanic boundary?
This boundary creates folded mountains (Himalayas)
What is a converging Continental/Continental boundary?