geologic time

geologic 

this topic is aput the last years or millons of years ago


i going to said you some words taht you need to lern  
the idea of many rocks together and the odest is in the button and the youngest in on the top
relativ age the ag of a rock compare with another rock 
geologic collum a listb of rock layewrs from the oldest to the youngest

They are so much words but this are basic words but i think that this is a berry good topic beceaus imagime how they workcompare with our technology