The Topock quadrangle exposes a structurally complex part of the Colorado River extensional corridor and also exposes deposits that record landscape evolution during the history of the Colorado River. Paleoproterozoic gneisses and Mesoproterozoic granitoids ...

This paper is about geochemical classification of granitic rocks, which is based upon three variables.

The equilibrium hedenbergite + ilmenite + oxygen : titanite + magrretite * quartz isimportant in distinguishing relatively oxidized from relatively reduced granitic rocks. This study deals with the aforementioned.