week 1 Flashcards
is a fracture or zone of fractures between two blocks of rock.
•A fault
may range in length from a few millimeters to thousands of kilometers.
Faults
relating to earthquakes or other vibrations of the earth and its crust.
Seismic
happens when two blocks of the earth suddenly slip past one another.
earthquake
are giant waves caused by earthquakes or volcanic eruptions under the sea.
Tsunamis
what are the Three Basic Fault Types
Normal fault
Reverse fault
Strike-slip fault
EXTENSION
normal fault
COMPRESSION
reverse fault
SHEAR
strike-slip fault
what are the Layers of the Earth
crust
mantle
outer core
inner core
Earth’s crust and its rigid upper mantle are broken into enormous slabs called ____.?
plates
Theory of Plate Tectonics
Earth’s crust and its rigid upper mantle are broken into enormous slabs called plates.These plates are all moving in different directions at different speeds.
Adjacent plates can crash together, pull apart or sideswipe each other.
the place where two plates meet is called a?
plate boundary
_____have different names, depending on how two plates are moving relative to each other.
boundaries
what are the 3 types of plate boundaries?
divergent
convergent
transform
result of two diverging plates is a?
valley-like rift
plates move apart/ move away from eachother
divergent boundaries
plates move toward each other
Earthquakes and volcanoes are commonly experienced and found near ______ boundaries
convergent
In Convergent boundaries, one of the two plates is descending
beneath the other.
This process is called ________.
subduction
Formed when two plates slide past each other horizontally
transform boundaries
Why do Earthquakes Occur?
Plate boundaries are made up of many systems of fractures called faults. The rough edges may cause the plates to rupture.
Types of Fault
Reverse fault
Normal fault
Strike-slip fault
a fault in which hanging wall moves down relative to the footwall as a result of extension. These are the most common faults
Normal FaultNormal FaultNormal Fault
are two blocks of crust layer pulling apart, extending the crust
into a valley thus, creating a space
Normal Fault