Lecture-9-Earth-comp-Fall-20204-6

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Capped hole (23 cm diameter) in 2012
Instead, we make a hypothesis and then test to see if this hypothesis is supported by observations. Most widely accepted hypothesis for the composition of the bulk Earth is that of chondritic meteorites. The exact proportions or different chondritic meteorite types is still debated.
This is the chondritic Earth model for the primitive bulk composition of the Earth We can simply average the most common chondritic meteorites and we will get something close to the following composition:
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