Physical Sciences and Mathematics Commons^™

Stratigraphy, Paleoenvironments, And Correlation Of The Upper Ordovician Tate Member Of The Ashlock Formation At Point Leavell, Kentucky, N. Flores, Benjamin Dattilo, S. Mosser, J. Mosser, P. Bremer, J. Moffett, M. Harrison

Benjamin F. Dattilo

No abstract provided.

Shales And Shell Beds, Storms And Starvation, Substrate And Fossils: Exploring The Ecological And Evolutionary Impact Of Mud Sedimentation In The Cincinnati Ordovician, Benjamin Dattilo, D. Meyer, M. Harrison

Benjamin F. Dattilo

No abstract provided.

The Importance Of Peritidal Muds And Siliciclastic Phase Reversal In Understanding Cincinnatian Cyclogenesis, Benjamin Dattilo, S. Mosser, N. Flores, M. Harrison, J. Moffett

Benjamin F. Dattilo

No abstract provided.

Stratigraphy, Paleoenvironments And Correlation Of The Lower Part (C2-C3 Boundary) Of An Outcrop Of Upper Ordovician Rocks Near Fredericktown, Kentucky, S. Mosser, Benjamin Dattilo, N. Flores, J. Moffett, J. Mosser, P. Bremer

Benjamin F. Dattilo

No abstract provided.

Facies Mosaics Vs. Sequence Stratigraphy: Using Fine Scale Stratigraphic Correlations To Decode Sedimentary Facies In The Cincinnatian, Maysvillian Stage, T Schramm, C Brett, Benjamin Dattilo

Benjamin F. Dattilo

No abstract provided.

The Mollusk-Rich Ordovician Miamitown Shale Mapped From Cincinnati To The Bluegrass: Probing Contemporaneous Peritidal Deposits To Decipher The Paleobathymetric Problem Of A Puzzling Pelite., Benjamin Dattilo, Thomas Schramm, Sasha Mosser, Lydia Mark, William Ward

Benjamin F. Dattilo

While most Upper Ordovician (Katian stage) strata in the Cincinnati region can be characterized as mixed carbonates and mudstones, there are a few carbonate-poor silty mudstone units including the Maysvillian Miamitown Shale and the Richmondian Waynesville Formation. These are characterized by molluscan faunas that contrast with the typical brachiopod-bryozoan fauna of the Cincinnatian, or, for that matter, of the Lower Paleozoic in general. The paucity of more widespread common taxa makes it difficult to use such assemblages in determining paleoenvironmental conditions, particularly water depth. Thus, combined with the lack of distinctive sedimentological indicators, it is difficult to say if these …

Sedimentology And Microstratigraphy Of A Cincinnatian Edrioasteroid Obrution Deposit., Aaron Morse, Benjamin Dattilo, David Meyer, Lydia Mark, Michael Harrison

Benjamin F. Dattilo

The Manchester edrioasteroid pavement is a shell layer in mudrock from the Corryville Formation (U. Ordovician, Maysvillain). No previous studies have examined sediments that buried Cincinnatian edrioasteroid pavements. To address this problem, a 16 cm thick stratigraphic sample measuring 90 cm by 30 cm was collected with a plaster jacket, dried for 2 years, then encased in fiberglass for dry cutting into slabs 2-4 cm thick. These were hardened with epoxy and polished dry with sandpaper. A prepared slab was sent to Bruker AXS for analysis using the M4 Tornado µ-XRF.

Delicate colonies of bryozoans, embedded in mudrock were found …

Upper Ordovician Strata Of Southern Ohio-Indiana: Shales, Shell Beds, Storms, Sediment Starvation, And Cycles, Carlton Brett, Thomas Schramm, Benjamin Dattilo, Nathan Marshall

Benjamin F. Dattilo

The Cincinnatian Series (ca. 450 to 442 Ma) of the Cincinnati Arch features some of the most spectacular Ordovician fossils in the world. The rich faunas of bryozoans, brachiopods, molluscs, echinoderms, and trilobites are preserved as discrete shell-rich limestones, cyclically interbedded with sparsely fossiliferous shales and mudstones that may yield exceptionally preserved trilobites and crinoids. Similar successions of shell beds interbedded with mudstones are common components of Paleozoic successions. In such successions, the genesis of the highly concentrated shell beds is often attributed to storm-winnowing, but is this the whole story? This trip will offer an overview of the classic …

The Lower Ordovician Fillmore Formation Of Western Utah: Storm-Dominated Sedimentation On A Passive Margin., Benjamin Dattilo

Benjamin F. Dattilo

No abstract provided.

Layer-Cake Stratigraphy Versus Facies Mosaics In The Cincinnati Ordovician: What Is The Bedding Scale Structure Of The Stratigraphic Record?, Benjamin Dattilo

Benjamin F. Dattilo

No abstract provided.

Tempestites In A Teapot? Condensation-Generated Shell Beds In The Upper Ordovician, Cincinnati Arch, Usa., Benjamin F. Dattilo, Carlton E. Brett, Thomas J. Schramm

Benjamin F. Dattilo

Skeletal concentrations in mudstones may represent local facies produced by storm winnowing in shallow water, or time-specific deposits related to intervals of diminished sediment supply. Upper Ordovician (Katian) of the Cincinnati region is a mixed siliciclastic-carbonate succession including meter-scale cycles containing a shelly limestone-dominated phase and a mudstone-dominated phase. The “tempestite proximality model” asserts that shell-rich intervals originated by winnowing of mud from undifferentiated fair-weather deposits. Thus shell beds are construed as tempestites, while interbedded mudstones represent either fair-weather or bypassed mud. Meter-scale cycles are attributed to sea-level fluctuation or varying storm intensity. Alternatively, the “episodic starvation model” argues, on …