nyu law dating - Dating dinosaurs
A date of ~26,000 years BP was obtained for bones that were devoid of collagen. Some examples from many references include: marble, 0.060-0.932 PMC, A. Controversial radiometric dates have been recorded for material from Hawaiian volcanic eruptions in 1800-1801 and the Hawaiian magma there gave dates of 1.41 and 1.60 million years BP according to G. Moreover, natural diamonds thought to be "greatly in excess of 100 million years" gave apparent variable RC dates of "64.9 ± 0.4 ka BP to 80.0 ± 1.1 ka BP.
Six fragments from a single diamond exhibited essentially identical C-14 values – 69.3 ± 0.5 ka – 70.6 ± 0.5 ka BP as reported by Taylor and Southon.
well above the bone strata; this suggests that the RC date for the bones was reliable as clay acts as a barrier. Significant age discrepancies between C-14 and other radiometric techniques In spite of sometimes erratic C-14 dates, there are far more controversial dates when C-14 datable material or historical dates for magma flows are compared with potassium/argon dates. Lovering et al., the K/Ar dates for tektites ranged from 700,000 B. Fission-track dating ranged from 30,000 to 800,000 BP and was interpreted as consistent with K/Ar ages. Gill, had RC dated charcoal and calcareous nodules as they were found with "australites." Thus Lovering et al. Helens in the United States ranged from 350,000 to 2,700,000 years BP using K/Ar dating according to G. Had carbon-datable material been RC dated from the cores such as shells, carbonized wood, amber, charcoal and bones, would they have discovered a date much closer to the present as with the australites or as with the wood buried deep in the Prudhoe Bay permafrost?
summarized these extensive mammoth RC dating studies but collagen content was not discussed. reported on C-14 dating of small mammoths on Wrangell Island in the Arctic Ocean north of Siberia: The eight mammoth bones, tusks and teeth gave RC ages at 4000 to 5000 RC years BP using purified collagen. Three dacite components from the final lava flow of A. Furthermore, fossil materials other than dinosaur bones and amber that should be free of C-14 but contain significant amounts include anthracite coal, fossil natural gas, fossil wood and marble resulting from the metamorphism of limestone.
It's important to note that the authors concluded: "There was no statistical RC difference between the bones and that of the organic material and dating of mammoth bones is [thus] reliable." S. Examples of other magafauna RC dates include 50 mammoths buried together near Hot Springs, South Dakota, USA. All contain some corrected percent of modern C-14 (PMC'S). C-14 dates for carbon-containing material from the Chesapeake Bay or Chicxalub core samples would be useful for comparison.
Rivers draining the Western Mountains deposited layer upon layer of sediments which over alleged millions of years compacted to form the sandstones, mudstones, clays, and shales that form the Montana Badlands landscape according to the Makoshika State Park web site. It usually refers to any clay that swells and shrinks.
Geology of the Triceratops and Hadrosaur excavation sites: The Triceratops and Hadrosaur femurs were found in popcorn clay. The color varies from grey to grey-green to green to tan; it is found in distinct thick strata.
Indeed both bones contained collagen and conventional dates of 30,890 ± 380 radiocarbon years (RC) for the Triceratops and 23,170 ±170 RC years for the Hadrosaur were obtained using the Accelerated Mass Spectrometer (AMS).
Total organic carbon and/or dinosaur bone bio-apatite was then extracted and pretreated to remove potential contaminants and concordant radiocarbon dates were obtained, all of which were similar to radiocarbon dates for megafauna. Walter Libby's team of collagen from "dense mid-shaft femur bones" of twelve extinct saber tooth tigers, [Smilodon] from the Le Brea Tar Pits of Los Angeles CA.
Critics suggested that the samples became contaminated with modern Carbon 14. al., “Measurable , August 2003.) In 2012, researchers analyzed multiple dinosaur bone samples from Texas, Alaska, Colorado, and Montana.
However, Carboniferous coal was carefully extracted from deep within mines (far below the layers containing dinosaur remains) and fully sealed till lab analysis. C-14 dating revealed that they are less than 39,000 years old.
Its geologic location was the Hell Creek Formation in the State of Montana, United States of America.
When it was learned in 2005 that Triceratops and Hadrosaur femur bones in excellent condition were discovered by the Glendive (MT) Dinosaur & Fossil Museum, Hugh Miller asked and received permission to saw them in half and collect samples for C-14 testing of any bone collagen that might be extracted.
Unwilling to challenge the data openly, they erased the report from public view without a word to the authors or even to the AOGS officers!