Possible subjects for discussion include all aspects of solid earth geology and geophysics, including, but NOT limited to: plate tectonics, tectonophysics, petrology, mineralogy, volcanology, structural geology, palaeontology, sedimentary processes, basin analysis, seismic exploration, seismic stratigraphy, petroleum geology, seismology, geochemistry, glaciation, groundwater hydrology, hydrogeology, geochronology, palaeomagnetism, palaeoclimatology.

Subjects that will generally NOT be tolerated, at the list owner's sole discretion, include politics, religion, pseudo-science, grossly or repeated commercial posts, repeated unaltered posts on the same subject matter, etc., gratuitous abuse or insults to other group members.