pbsdigitalstudios: By looking at the layers beneath our feet, geologists have been able to identify
pbsdigitalstudios:By looking at the layers beneath our feet, geologists have been able to identify and describe crucial episodes in life’s history. These key events frame the chapters in the story of life on earth and the system we use to bind all these chapters together is the Geologic Time Scale. -- source link
#geology#geologic time#geologic timeline#scence#epoch#period