I am Dr. J. Madhavaraju, received my doctoral degree from University of Madras, India in 1997 and worked several years as a post-doctoral researcher in India. Currently, I am working as Investigador Titular B in Estación Regional del Noroeste, Instituto de Geología, Universidad Nacional Autónoma de México, Hermosillo, Sonora, México. Basically, I am a sedimentary geochemist. My research interest includes clastic and carbonate geochemistry, U-Pb geochronology, clay mineralogy, isotope geochemistry, paleoclimate, paleoceanography, paleoweathering and provenance studies, OAEs, and microtextures on quartz grains. I have worked on diverse kinds of depositional environments ranging from modern to Precambrian. However, majority of my works were mainly focused on the clastic and carbonate rocks of Cretaceous age.