Do you like cliffs? How about mountains?
These basalt rock cliffs formed before we were born, before my grandparents were born and even a couple of million years before George Washington was born to form the cliffs we are standing on right now.
We are standing in cliffs in Northern NJ that are made of basalt and make up Mills Reservation. Hundreds of millions of years ago, before the ice age, a volcano exploded in what is now Newark and the lava cooled, forming basalt rock and these cliffs.
We found rocks other than basalt that most likely flowed into the area during the ice age. We are walking along the same rocks that Mastodons walked along during the ice age.