Earth

Earth

1. Bombardment

   • The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is an event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago,

2. Geological Time Scale

   • The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time

3. Geological Time Scale Layers of the Earth

   • he Earth's Layers Lesson #1 The Four Layers. The Crust. The Mantle. Convection Currents. Outer Core. Inner Core.

4. Stratigraph

   • the branch of geology concerned with the order and relative position of strata and their relationship to the geological time scale.

5. Fossil Record

   • history of life as documented by fossils, the remains or imprints of the organisms from earlier geological periods preserved in sedimentary rock

6. Relative Dating

   • Relative dating is the science of determining therelative order of past events (i.e., the age of an object in comparison to another), without necessarily determining their absolute age

7. Absolute Dating

   • Absolute dating is the process of determining an age on a specified chronology in archaeology and geology