Geological Time
What method of dating rocks uses the decay of radioactive isotopes to calculate age?
What is absolute age dating?
What is the name for the point on Earth's surface directly above the earthquake's origin?
What is the epicenter?
What are the three types of tectonic plate motions?
what are Convergent, Divergent, and Transform?
According to the principle of superposition, where in a sequence of undisturbed sedimentary layers would you find the oldest rocks?
What is the bottom layer?
Which seismic wave is the fastest and can travel through solids, liquids, and gases?
What is a P-wave?
What name is given to the brittle outer layer of Earth composed of the crust and upper mantle?
What name is given to the brittle outer layer of Earth composed of the crust and upper mantle?
Which type of unconformity involves sedimentary rocks overlying igneous or metamorphic rocks?
What is a nonconformity?
What do we call the type of stress that pulls materials apart, often found at divergent boundaries?
What is extensional stress?
Where is new oceanic crust formed?
What is the mid-ocean ridge?
What type of fossil is geographically widespread, easily recognizable, and lived for a short geological time span?
What is an index fossil?
How many seismograms are required to accurately determine the epicenter of an earthquake?
what is three?
What is the term for localized columns of hot mantle material that create volcanic island chains?
What is a mantle plume or hot spot?
How old is a rock sample if its parent isotope has a half-life of 1,000 years and 3 half-lives have passed?
What is 3,000 years?
What causes surface waves to maintain their energy even over long distances?
What is attenuation?
which plate tectonic do we find the deeper hypocenters at?
What is a Convergent boundary? (oceanic-continental collision)