As the number of fossils dated is not too large, the dating of materials from this region will provide important information to better understand the events associated with the presence and extinction of these species.
Introduction to ESR and chronology science and principle of ESR dating and dosimetry are described with applications to actual problems according to materials.The study of radiation defects created in biomaterials, such as bone and teeth, can be used in dating with importance to palaeontology and archaeology.Dose–response curves of each sample were constructed using spectra acquired with a JEOL FA-200 X-Band spectrometer resulting in equivalent dose ( in age was made using ROSY ESR dating software resulting in 26±4 and 22±3 ka.These results place Lagoa dos Porcos fossil assemblage within the Late Pleistocene.Electron spin resonance (ESR) dating was applied to date a sample of fossil tooth found in Ribeira Valley, São Paulo, Brazil.
This region is characterized by abundant fossil records of Pleistocene–Holocene South American megafauna belonging to different faunistic moments related to climate changes during the quaternary.
The trapped electrons form para-magnetic centers and give rise to certain signals that can be detected under an ESR spectrometry.
The amount of trapped electrons corresponds to the magnitude of the ESR signal.
This book is written primarily for earth scientists as well as for archaeologists and for physicists and chemists interested in new applications of the method.
This book can serve as an undergraduate and graduate school textbook on applications of ESR to geological and archaeological dating, radiation dosimetry and microscopic magnetic resonance imaging (MRI).
Two Stegomastodon teeth (AL1 and AL2) from north-eastern Brazilian megafauna were studied by electron spin resonance (ESR) spectroscopy.