CompuServe Messages

Hi, Doug– I'm pretty much satisfied with the "hydrocarbon-doped smectite" hypothesis, as it fits the environment of deposition, and there seem to be no significant objections (chemically/physically/petrologically). I'll maybe have to read up some more on smectites and hydrocarbons, just to be sure (or get hold of somebody who can do some free microprobe/x-ray diffraction work!) Thanks for the help. Howard.