65 million years ago (mya), there was a mass dinosaur extinction caused by an asteroid impact.
You've probably heard that statement before. Of course, young earth creationists—who constitute a large percentage of fundamentalist Christians—believe the earth is only 6 thousand years old.
So why does science claim that there was a dinosaur extinction caused by asteroid impact 65 million years ago?
Listen to these stunning words from Science Now Daily News:
Okay, if you believe the earth is 6 or even 10 thousand years old, exactly how do you explain this …
Scientists have found that the earth has layers. The life forms represented by the fossils in those layers are different than the life forms alive today. By dating rocks from various layers all over the world—though some places, due to geological events, don't produce datable rocks—scientists have been able to put together dates for each of those layers.
Dinosaurs appear in the Triassic, Jurassic, and Cretaceous layers but not before or after. What caused them to suddenly disappear?
Well, there is a huge crater in the Yucatan peninsula called the Chicxulub Crater (don't try to pronounce that or you'll need a tongue doctor). Amazingly …
I know what you're thinking. You're thinking, "Huh???"
What that says is that the melt glass formed by the impact of the asteroid on the Yucatan peninsula dates to 65 mya, plus or minus about 200,000 years.
Wow. That's when scientists dated the dinosaur extinction based on the geologic column and radiometric dating.
But wait …
An anomaly is "an oddity; inconsistency; deviation from the norm." Amazingly—coincidentally—there is an iridium anomaly right at the 65 million year mark in the geologic column. All around the world "sediments that were deposited then show traces of iridium, an element that is rare on Earth but common in asteroids" (see above).
I wonder how that happened?
Those are the errors found by creationist John Woodmorappe charted on a graph against the expected ages. He found 375 radioactive dates that were off from actual dates by 20% or more. Former young earth creationist turned old earth creationist Glenn Morton stuck them on this chart. (I had a link to Glenn's article, but he has removed his entire science and origins web site because he's tired of the way the debate is being handled. You can read this article which addresses Woodmorappe's arguments as well.)
Amazing consistency, isn't it? And those are the errors!
So the next time you someone asks you why scientists say, "65 million years ago, mass dinosaur extinction was caused by an asteroid impact," tell them it's all based on coincidence.