The time line of the history of the earth based from the rock record

Evolution of earth's history

These are an essential part of subdividing the geologic time

A sub-discipline of stratigraphy which deals with the use of fossils in correlation and establishing the relative ages of rocks

These are marker fossils used to define periods of Geologic Time.

Was assigned numerical dates through the radiometric dating of rocks

It is an important tool used to portray the history of the Earth-a standard timeline used to describe the age of rocks and fossils, and the events that formed them

Geologic time scale is seperated in 4 major divisions

These are naturally occuring conditions that can cause immense damage to properties and loss of lives

4 types of geologic hazards

This is the sudden movement of the earth's crust that results from the release of accumulated strain from tectonic and volcanic activities

Parts of an earthquake

Hypocenter also called as?

This refers to the actual location of the first motion that causes the earthquake

This part of an earthquake is located beneath the earth

It is the point on the Earth's surface directly above the focus

These are planes of fracture in rock bodies

The vibration of the ground during an earthquake

Effects of an earthquake

It is where soil loses strength temporarily and behaves as a liquid

It is the tearing of the ground surface caused by displacement along faults during earthquakes

It is the discharge of materials and gas from the interior of the volcano to the surface and to the atmosphere

Movements of materials: volcanic eruptions

It is dense mixture of gas, ash, and volcanic rocks

It includes pyroclastic surges and columns of ash

It is a catastrophic mudflow on the slopes of volcanoes

Landslide is also known as?

It is the general term that refers to the movement of earth material down slopes

Landslide types

It is the fall of unconsolidated material

It occur when water seeps into the soil and bedrock causing breakage and flow

Are composed of a mixture of water and volcanic materials

Tsunamis are created by weather disturbances such as an ______, _______, _____, or ______

It is a geologic hazard where series of waves are formed

Volcanic eruptions may cause _________, ______, and may release _________

True or false The movement of tectonic plates can also cause tsunami.