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American Museum Of Natural History Paper

The Earth formed when the sun and its forming of planets formed when a cloud of dust and gas condensed 4.6 billion years ago. In large areas, iron sinks to the center forming the core. The Mantle is made up from primarily of the minerals olivine and pyroxene. It takes up 80% of the planet. The oceanic crust typically differ from continental crust because Earth’s surfaces cooled below 100 degrees C. Water rained out of the atmosphere. Continental Crust is very thicker then the oceanic crust. The oldest rock that was found on Earth was the Acasta Gneiss from the Canadian Shield. Quartz pebble formed 3 billion years ago but the zicron crystals are 4.276 billion years old. It undergoes uplift, erosion, and growth. The age of the earth was being solved in many different ways. In the 1700’s they believed on the age by parts written in the bible, to getting seashells and fossils. In the 1800’s for using studies of rocks to estimated earth’s age. 1900’s looking at meteorites and rock...

Posted by: Jason Pinsky

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