Can someone please tell me one process that says the Earth's billions of years old besides radiometric dating?
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Novaknight1 said:Can someone please tell me one process that says the Earth's billions of years old besides radiometric dating?
cerad said:Novakight asked for evidence not based on radiometric dating. Care to try again?
Except the Bible does not say that.Travis St. Hubbins said:Can anyone name one process that says the Earth is 6000 years old besides "The Bible/God says so"?
JohnR7 said:The age of the earth is mostly determined by Geology. If you look at the salt deposits, or the limestone & chalk deposits or the coal & oil deposits, they indicate a earth that has been around a while.
Also, if you look at Niagra Falls, the erosion rate is about 2 feet a year and there is 500 miles of erosion. So that would have taken quite a few years.
If you look at the spindown rate of the earth and the receding rate of the moon. They both act very much like the moon bounced off of the earth at one time. That is something that would have happened quite a while ago, based on the rate the moon is moving away from the earth.
thirstforknowledge said:The post was not to show Nova another way of dating. It was to cut off the argument that he was undoubtedly going to come out with, about radiometric dating not being reliable.
corvus_corax said:From Australian Museum online
Fission track dating
Several minerals incorporate tiny amounts of uranium into their structure when they crystallise. The radioactive decay from the uranium releases energy and particles (this strips away electrons leading to disorder in the mineral structure). The travel of these particles through the mineral leaves scars of damage about one thousandth of a millimetre in length. These 'fission tracks' are formed by the spontaneous fission of 238U and are only preserved within insulating materials where the free movement of electrons is restricted. Because the radioactive decay occurs at a known rate, the density of fission tracks for the amount of uranium within a mineral grain can be used to determine its age.
To see the fission tracks, the mineral surface is polished, etched with acids, and examined with an electron microscope. An effective way to measure the uranium concentration is to irradiate the sample in a nuclear reactor and produce comparative artificial tracks by the induced fission of 235U.
Fission track dating is commonly used on apatite, zircon and monazite. It helps to determine the rates of uplift (for geomorphology studies), subsidence rates (for petroleum exploration and sedimentary basin studies), and the age of volcanic eruptions (this is because fission tracks reset after the eruption). However, care is needed as some samples have fission tracks reset during bushfires, giving far too young ages. Fission track dating is mostly used on Cretaceous and Cenozoic rocks.
The SHRIMP technique
The SHRIMP (Sensitive High Resolution Ion MicroProbe) technique was developed at the Research School of Earth Sciences, Australian National University, Canberra in the early 1980s. It has revolutionised age dating using the U-Pb isotopic system. Using the SHRIMP, selected areas of growth on single grains of zircon, baddeleyite, sphene, rutile and monazite can be accurately dated (to less than 100 000 years in some cases). This technique not only dates older mineral cores (what we call inherited cores), but also later magmatic and/or metamorphic overgrowths so that it unravels the entire geological history of a single mineral grain. It can even date nonradioactive minerals when they contain inclusions of zircons and monazite, as in sapphire grains. The SHRIMP technology has now been exported to many countries such as the USA, France, Norway, Russia, Japan and China. It can help fix the maximum age of sedimentary rocks when they contain enough accessory zircon grains (usually need about 100 grains).
Because of advancements in geochronology for over 50 years, accurate formation ages are now known for many rock sequences on Earth and even in space. The oldest accurately dated rocks on Earth are metamorphosed felsic volcanic rocks from north-west Western Australia. These were dated at about 4.5 billion years old using single zircon grains on the SHRIMP.
Socrastein said:How about the fact that all the species alive today evolved over what would undoubtedly take a few billion years?![]()
Im guessing......Novaknight1 said:Thanks. I would LOVE to have one of those machines. How much do they cost?