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.Possibly the RC dated femur bone belongs to the Triceratops remnants from "Lone Ridge." Thus testing for C-14 in other bones seems to be the next step in the ongoing research.The Hadrosaur location was in a dry wash which flows into Frank Creek, then into Glendive Creek and then into the Yellowstone River just North of Glendive Montana in the NW ¼, NE ¼ of Sec. Site Title: Raine Horne The website's html version is html3, IP Address is 126.96.36.199 and Alexa Rank is 21986253 Site Categories : raine and horne, raine & horne, raine and horne, rain & horn, au, raine & horne real estate, raine & horne franchise, raine & horne, agriculture, apartment for rent, apartment for sale, apartments, auction, australia, buy real estate, commercial, commercial property, commercial real estate, conveyancing, crops, estate agent, finance, financial services, find a real HTML and text sizes are used in the main page of like the graph.
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.No collagen was detected and only bone bio-apatite was RC dated.Bone bio-apatite can be unreliable due to potential contamination from calcium carbonate replacement containing modern or dead carbon [unless carefully pretreated]. of clay above the bones by Wayne and Doug Wilder indicated no contamination as carbon [from the flesh] apparently migrated away from the bones with 0.5% C immediately above and only 0.1 % C, 30 cm. The K/Ar dating of tektites from Indonesia, Thailand, Indochina and Philippines agreed.The data was challenged by Thomas Stafford as poor science due to assumed contamination from modern C-14 with younger surficial calcium carbonate.
Accelerated Mass Spectrometer (AMS) dating of dinosaur bone bio-apatite from 170 grams of bone fragments and milligram surface scrapings of an Acrocanthosaurus dinosaur gave ages of 25,750 ± 280 and 23,760 ± 270 respectively.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?