ELS Flashcards
are geological processes that
occur beneath the surface of the Earth. It is associated with energy originating in the interior of the solid earth.
ENDOGENIC PROCESS
The ground we live on is moving all the time. The forces within the earth that cause the ground to move are called
ENDOGENIC PROCESS
is the process of changing
materials that make up the rock. The chemical components and geologic characteristics of the rock change because of exposure to heat & pressure.
It is an endogenic process that occurs when there are pressure and heat applied to geologic structures which leads to the formation of Metamorphic Rocks.
METAMOPHISM
describes the process by which rocks are folded and faulted.
DEFORMATION
is the force applied to an object.
STRESS
It is the push or
squeeze against one
another where the
stress produced is
directed towards the
center and the crust
becomes shorter and
thicker, building
mountain ranges like
Alps or Himalayas.
COMPRESSION
are the up and
down folds that usually occur together
and are caused by compressional stress.
Anticlines and synclines
are folds in which each half of
the fold dips away from the crest.
Synclines are folds in which each half of
the fold dips toward the trough of the Fold.
Anticlines
are folds in which each half of
the fold dips toward the trough of the
fold.
Synclines
This intensely folded limestone from
Highland County shows how anticlines
and synclines typically occur together.
These sharp folds are called
“chevron”
It occurs as tectonic plates are pulled apart and crust becomes thinner.
Rocks near to the surface become faulted, sometimes producing rift valleys.
It refers to stress which stretches rocks in two opposite directions. The
rocks become longer in a lateral direction and thinner in a vertical direction
TENSION
Some of the
portions of a plate at the
edge may break away in
different directions.
Eventually making the
plate smaller inside.
When forces are parallel
but moving in opposite
directions, the stress is
called
SHEAR
It is the fracturing and displacement of more brittle rock strata along
a fault plane either caused by tension or compression. A break in
rock along which a vertical or horizontal rock movement has occurred is called
FAULT
These lines are often lines of weakness that allow the molten rock to rise onto the Earth’s surface when there is active
volcanic activity nearby.
FAULT LINE
form when the hanging wall drops down. The forces that create. normal faults are pulling the sides apart, or extensional.
normal faults
form when the hanging wall moves up. The forces creating. reverse faults are compressional, pushing the sides together.
reverse faults
have walls that move sideways, not up or
down.
Transcurrent or Strike-slip faults
Heat generated
during earth’s
formation
PRIMORDIAL HEAT
Heat generated by
long-term radioactive Decay
RADIOACTIVE HEAT
energy is transferred by direct contact
CONDUCTION
energy is transferred by the mass motion of molecules
CONVECTON
energy is transferred by electromagnetic radiation
RADIATION
It happens when magma generated and
develops into igneous rocks.
MAGMATISM
The rising magma in mantle
convection cell brings heat to the surface, transferring heat to the overlying rocks.
MID-OCEANIC RIDGES