Radio carbon dating dinosaur bones
In light of the discovery of soft tissue in a T-Rex from the Montana Hell Creek Formation and RC dates for other fossils in the geological record it was decided to examine the bone interior of this femur, as Libby's team did with Smilodon and Schweitzer et al. 2a to 2d shows the support system including Plaster of Paris and wooden support base.
did with the T-Rex "hind limbs." The Triceratops femur bone was discovered in what is called "popcorn clay." Since the bone was so huge (122 cm long and 20 cm through the shaft area) and completely intact [hard, and neither crushed nor deformed, ideal for extracting possible bone collagen] it was sawed open in late July 2005 near the proximal end, as shown in Fig. The Triceratops femur was resting on a layer of popcorn clay in an apparent, almost aseptic sand and fine clay matrix.
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.
32, T16N, R56 E, Dawson County, Montana about 13 km south-east of the Triceratops location according to Otis Kline (2). 1 and Fig 2 were taken during excavation for the Triceratops femur.
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.
No collagen was detected and only bone bio-apatite was RC dated.
It is very slippery in wet, and crunchy in dry condition, according to paleontologist Otis Kline.
The data was challenged by Thomas Stafford as poor science due to assumed contamination from modern C-14 with younger surficial calcium carbonate.
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.
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).
This is on private land in Dawson County, Montana being located in the NW ¼ of NE ¼, Sec. The location of this RC dated Triceratops singular femur bone is just over 2.4 km east southeast from Otis Kline's 37 acre research station that has been geologically mapped. The elevation appears to be the same as the Triceratops being excavated on Kline's "Lone Ridge" for the past three summers where no femur bones were discovered.
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.