Ireland Gates

made up by rock layers being squeezed 

huge tilted blocks of rock separated by a fault

breaking down or rocks by natural precess

picking up and removing rock paricales 

material produced by breaking plant and animal remians 

series of horizions

rain water that soaks into spaces between rock fragments underground

downhill movement of Earths material caused by gravity

dropping off of sediments in 

slow moving sheets of snow and ice

jumble of many  sizes of sediment deposited by a glacier when it melts

till in front of along sides of a glacier they can form great lakes

a naturally occurring solid object in Earth's crust 

forms when hot liquid rock cools and hardens

forms from pieces of other minerals that are squeezed togother

formed from another kind of rock that is changed by heat, pressure,or chemical change

never ending cycle no beginning no end

the idea that in a series of rock layers the bottom layer is the oldest

the age of a rock as compared with another rock

a listing of Earths oldest rock layers in order from oldest to youngest

any trace, imprint, or remains of a living thing preserved in Earths surface

the remains of a living thing that was wide spread but lived for a short time in Earths history

the time it takes for the mass of a radioactive element in a rock to break apart, or decay, into other elements

the age of a rock in years 

one of the four long stretches of time in Earth's history