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In northern Arizona is a large Meteor Crater, the Barringer Crater, Its well preserved shape suggests a very recent origin.
Knowing this and an estimated amount of carbon-14 in the organism while alive can be used to determine the age of the fossil.
For a website with a simple calculator that computes this for you, see is the half-life of carbon-14 (5,700 years).
More shocking is the fact that the microfossils in this sediment were dated to less than 7,000 years ago.
The really disturbing conclusion is that civilization destroying bolides such as these have happened not millions of years ago but thousands of years ago. We agree with Dallas Abbott that dangerous meteors have struck the earth in recent times and that the governments of the world should be aware of this fact.
Know that not all of the carbon-14 atoms decay at the same time, but the half-life describes how long it takes for half of them to decay.
Some radioactive isotopes decay very rapidly, in fractions of a second, while others might take hundreds of thousands or even millions of years. Answer: Scientists determine the age of a fossil by determining the amount of Carbon -14 that has decayed since the organism died and was buried in the ground.
The age of this event has varied from 800 years ago to 200,000 years ago.
Whats at the bottom might be shattered rocks or impact melt or maybe a piece of meteorite.
National Geographic reports that scientist Dallas Abbott from Columbia University has been gathering data and announcing for the past ten years that a giant tsunami deposited ocean floor sediment on Madigascar.
In 1907 a large something from outer space destroyed thousands of acres of forest in Tunguska.
Scientist for the last hundred years have been searching for a crator or remnants of space rock.