8 minute speed dating ct Koobi fora fossil argon dating controversy

Last time, we learned about stratigraphy and the law of superposition.

Now the students are going to use this information to come up with a reasonable interpretation of the age of fossils.

koobi fora fossil argon dating controversy-16

In 1967, Cerling enrolled at Iowa State University, Ames, IA, to study engineering.

However, a geology elective sparked his interest, and he switched to the discipline that would make his career.

It was found in an iron and zinc mine in Broken Hill, Northern Rhodesia (now Kabwe, Zambia) in 1921 by a Swiss miner named Tom Zwiglaar.

Dating is uncertain, but probably between 700,000 and 400,000 years old.

One of the most important methods of geologic dating in the Turkana Basin is radiometric dating, including K/Ar and Ar/Ar dating.

Just like radiocarbon dating, these methods look at how much of the unstable isotopes have decayed over time and therefore, provide a precise age for a specific event. The rifting activity in East Africa created thin areas in the Earth’s crust.He graduated in 1972, but remained at Iowa State for a one-year master's program in geology.After briefly working for an oil company in Texas, he enrolled at the University of California, Berkeley, CA, for his doctorate.As a result, volcanic eruptions were relatively frequent, which shot out layers of ash that were transported and deposited in the Turkana Basin.Buried with the volcanic ash are minerals that contain radioactive Potassium and its decay product Argon gas, which are the targets of radiometric dating.The Mauer Mandible has been dated to 500,000 years old.