summary N 4

Summary N 4

Geologic time



In this summary i Leinny Ramos is going to tell you about geological time a very important topic because of history . In this topic i learn too many thing for example : how layers are form and how to know who is oldest  . what is relative age and what is absolute age : relative age is The age of a rock compared with another rock . and absolute age : The age of a rock in years . What is inside the rock ? : Fossils horizon layer etc . Also that there where  4 eras # 1 : Precambrian that was composed by bacterias and parasites , era # 2 Paleozoic era # 3 Mesozoic an finally era # 4 that was the one in do we live exactly in the period quaternary . Etc .

 This is the stone age one of all the eras of earth .

  This is a period the jurrasic period in where Dinasours start to appear .

 This is a fossil of maybe millions of years .