Early radioisotopic age constraints on the Campanian formations of your WIB consisted of K–Ar analyses of biotite and feldspar from interbedded bentonites115,116, with assumed uncertainties on the get of ± five%, and these analyses are certainly not discussed additional listed here. Biotite ages, particularly, are regarded as of questionable accuracy https://bookmarkinglog.com/story13177048/how-much-you-need-to-expect-you-ll-pay-for-a-good-fossils-video