The block above the fault moves up in relation to the block below usually at a steep angle.
What is a normal fault?
100
A large wave caused by an undersea earthquake or landslide.
What is a tsunami?
100
Most pieces will float on water. Form from a powerful eruption with lots of gas.
What is pumice?
100
Volcanic glass
What is obsidian?
200
Area of accumulated magma inside the volcano
What is the magma chamber?
200
Horizontal movement across the fault
What is a strike-slip fault?
200
The place an earthquake occurs.
What is an epicenter?
200
Thick and chunky, very slow moving lava.
What is AA lava?
200
Very fine particles, formed during a very extreme eruption.
What is volcanic ash?
300
Gentle slopes and usually circular shaped. Made of thin lava.
What is a shield volcano?
300
The bock above the fault moves down in relation to the block below.
What is a reverse fault?
300
Two continental plates collide and push up land between them.
What is the way mountains form?
300
Usually redish color. Will not float, but has lots of spaces inside formed by gas bubbles.
What is Scoria?
300
Fluid lava, has consistency of thick cream. Is very fast moving.
What is Pahoehoe lava?
400
Area of weakness in crust where magma can break through and well up.
What is a hot spot?
400
The block above the fault moves upward at a 45 degree angle.
What is a thrust fault?
400
A continental plate and oceanic plate collide forming a deep trench and a area of mountains that contain volcanoes.
What is a subduction zone?
400
Magma that moved up through a crack called a dike. Then it pushed up layers of sedimentary rocks which bent around it. Created a dome shaped mountain, when the rock eroded above it.
What is a laccolith?
400
Underwater, lava breaks open and forms new circular shaped formations.
What is pillow lava?
500
Steep slope at top, gentle slope at bottom. Made of alternating layers of ash, lava and scoria.
What is a stratovolcano or composite volcano?
500
Fault system that results in high areas surrounded by low areas
What is a Horst and Graben?
500
Time from the start of an S wave until the start of a P wave as measured at a seismic recording station.
What is the S-P interval?
500
Layers of thin flowing basalt that erupted out of a crack that opened in the ground. Many times will see multiple layers of basalts. Example is the Columbia River Basalts.
What is a basalt flow?
500
Is a pit in the ground formed by magma moving up until it hits pocket of ground water. Steam formed and then eventually blew up and formed a hole in the ground.