Geologic History

Geologic History

1. Bombardment

   • when astroids were hitting the earth from 4.1 to 3.8 billion years

2. Geological time scale

   • A system of dating that relates geological strata to time

3. Layers Of The Earth

   • there are 4 main layers of earth crust mantle outer core and inner core

4. Stratigraphy

   • the branch of geology with order and relitive position of strata and there relationship to the geological time scale

5. Fossil records

   • a group of fossils that have been studied and arranged bassed on how old or young they are

6. absolute dating

   • is the procces of determining based on calender dating

7. Reletive dating

   • is the science of determing the order of past events

Bilder und Dateien der Mindmap