Robert Duncan: Unfortunately, we haven't found many very old rocks on Earth because our planet's surface is constantly renewed by plate tectonics, coupled with erosion.

Unfortunately, we haven't found many very old rocks on Earth because our planet's surface is constantly renewed by plate tectonics, coupled with erosion.

-- Robert Duncan


		Name: Robert Duncan Type: none Nationality: none

https://www.nutquote.com/quote/Robert_Duncan