Abstract
ABSTRACT The carbonate members of the Dennis Formation can be divided into five regional diagenetic facies that are defined by differing preservation of originally unstable carbonate grains. Such grains contain no relict internal structure in the uppermost facies (A); they are better preserved in middle facies (B and C); and they are well preserved in the lowest facies (D). A fifth facies (E) contains no originally unstable grains and is characterized by a microcrystalline dolomite fabric. The five facies exhibit differing patterns of compaction and dolomitic void filling. The textures and interpreted diagenetic environments of the diagenetic facies were caused by progressive interaction of initially unsaturated meteoric water with the marine sediments during a general regression. Transfer of CaCO3 in that interaction and the resulting distribution of cements governed later patterns of pressure solution and void filling by ferroan dolomite. Paleohydrologic controls caused irregularities in the distribution of diagenetic facies. Paleotopographic and depositional trends derived from diagenetic evidence agree with previous interpretations based on depositional evidence.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
