There are many examples where the [radiometric] dating methods give ‘dates’ that are wrong for rocks of known historical age. One example is rock from a dacite lava dome at Mount St Helens volcano. Although we know the rock was formed in 1986, the rock was ‘dated’ by the potassium-argon (K-Ar) method as 0.35 ± 0.05 million years old. Another example is K-Ar ‘dating’ of five andesite lava flows from Mt Ngauruhoe in New Zealand. The ‘dates’ ranged from < 0.27 to 3.5 million years—but one lava flow occurred in 1949, three in 1954, and one in 1975!
My two cents
I’m glad that radiometric dating techniques can be empirically demonstrated to be inaccurate, thereby supporting the biblical concept of a young earth. (I trust that the rock samples have been re-tested recently and generated a consistently wrong result.)
I’ve come across Mount St. Helens in my reading recently, and I enjoy reading about it. If there were such a thing as Christian favourite mountains, I suppose the front runners might be (1) Mount Sinai, (2) the mountains of Ararat, (3) Mount Zion, or (4) the mountain of the LORD in Isaiah 2:3.
But to round it out for a Top 5, I feel like Mount St. Helens should be added to that list. Maybe I can do one of those Flash-based slide shows of Top 5s and Top 10s that seem popular on the internet—but I don’t think that the free version of WordPress allows for flash widgets etc.
Sarfati, J. (2009). How Old is The Earth? Available: http://creation.com/refuting-evolution-chapter-8-how-old-is-the-earth. Last Accessed 10th Feb 2014.