His graduate studies focused on the geology of the Great Basin of the western United States as revealed by the geochronology, chemistry, and paleomagnetism of gigantic ash flow eruptions that blanketed the area between 20 and 35 million years ago.
in Chemistry and Geology in 1975 from the University of California, Davis and his Ph. in Geology from the University of California, Berkeley in 1985.
it is based on the fact that changes in the earth's magnetic field over time can be recorded as remnant magnetism in materials such as baked clay structure (ovens, kilns, and hearths).
archaeozoology: sometimes referred to as zooarchaeology, this involves the identification and analysis of faunal species from archaeological sites, as an aid to the reconstruction of human diets and to an understanding of the contemporary environment at the time of deposition.
In addition, the study provides further evidence of extremely strong field in the late eighth century BCE (“geomagnetic spike”), and of rapid rates of change (20% over three decades).
The improved Levantine record is an important basis for geophysical models (core−mantle interactions, cosmogenic processes, and more) as well as a reference for archaeomagnetic dating.
archaeological culture: a constantly recurring assemblage of artifacts assumed to be representative of a particular set of behavioral activities carried out at a particular time and place (cf. archaeomagnetic dating: sometimes referred to as paleomagnetic dating.Here we address the latter by using a set of storage jar handles (fired clay) stamped by royal seals as part of the ancient administrative system in Judah (Jerusalem and its vicinity).The typology of the stamp impressions, which corresponds to changes in the political entities ruling this area, provides excellent age constraints for the firing event of these artifacts.Stratigraphy, including lithostratigraphy and biostratigrapy, is a branch of geology that studies both the age of the site and changes within the site.Lithostratigraphy is perhaps the most obvious, dealing with layers of sediment, reflecting the changes of environments of deposition, known as facies change.Dating is very important in archaeology, since age is critical in this science.