Radiocarbon dating video
They come in a variety of sizes, from microscopic traces to large animal skeletons and fossilized trees weighing many tons.The study of fossils leads to a greater understanding of the Earth's history, extinct life forms and evolution of life.After two half lives, a quarter is left; after three half lives, only an eighth; after 10 half lives, less than a thousandth is left.Diamond is the hardest substance known, so its interior should be very resistant to contamination.The floor is covered with soil, a mix of ash from fires, fine sand, silt, and locally fragmented rock to a depth of approximately 70 cm (28 in) which lies in seven distinct horizontal stratigraphic layers.
Tool marks on the ceiling and pillars clearly illustrate that the modifications served dual purposes, to providing a living space and to facilitate the removal of rock which was discarded down a talus slope.
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Wiens has a Ph D in Physics, with a minor in Geology.
There are over forty such techniques, each using a different radioactive element or a different way of measuring them.
It has become increasingly clear that these radiometric dating techniques agree with each other and as a whole, present a coherent picture in which the Earth was created a very long time ago.
Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.