R
reznwerks
Guest
Creationists need to come to class more often and stop using the excuse of carbon 14 only being accurate to 50,000 yrs. (which is a whole lot older than than the 6000 yr earth) Anyway there is a new game in town called the shrimp technique which confirms all the other assumption of the earth being 4.5 billion years old.
"The SHRIMP technique
Zoned zircon grain 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."
http://www.amonline.net.au/geoscience/e ... adiocarbon
"The SHRIMP technique
Zoned zircon grain 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."
http://www.amonline.net.au/geoscience/e ... adiocarbon