The SEPM constitution made it clear that the ‘object of the Society is to promote the science of stratigraphy through research in paleontology and sedimentary petrography , especially as it relates to petroleum geology’.
The lavas have been divided into two main series (informally called the lower volcanics and the plateau basalts) based on their stratigraphy, geochemistry and petrography .
A variety of sedimentological criteria, including petrography , texture, lithology and sedimentary structures, must be applied in the environmental analysis of Precambrian arenites.
All aspects of oceanic island rocks, including petrography , volcanology, and geochemistry, are inter-related. Thus, no one scale of observation is entirely satisfactory to understanding their origin.
The field-based studies were supplemented by thin-section petrography and whole-rock geochemistry to characterize different intrusive phases.
Interpretation of these spherules as impact-related has been challenged, but is supported by petrographic contrasts with volcanic ejecta, iridium and related siderophile anomalies, Ni-rich spinels and chromium isotopes.
Bill is a concrete chemist; Bernie is a concrete petrographer - each is a materials and concrete technologist.
The provenance of turbidites from the predominantly Arenig-aged Manx Group has been constrained using petrographical and geochemical techniques.
The petrographical and geochemical data provide little evidence for the existence of a contemporaneous volcanic arc and the igneous material is interpreted instead to have been derived from a palaeovolcanic source.
Geochemical and petrographical studies provide supporting evidence for multiple fluid flow events along the Moine Thrust Zone.