A single specimen of the protasterid ophiuroid Protasterina flexuosa from the Kope Formation (Cincinnatian, Upper Or− dovician) of Kentucky exhibits three−dimensionally pyritized tube feet. This represents the first report of soft−tissue pres− ervation in an echinoderm from the type−Cincinnatian series. The tube feet are solid and lack all internal structure. They consist of aggregated masses o...

Short stratigraphic sections in apparently monotonous strata pose several challenges to high-resolution (<l m) correlation. A lack of distinctive marker horizons can prevent obvious visual correlations between the sections. The stratigraphic shortness of the outcrops further reduces the likelihood of any given section having a recognizable marker horizon. The Upper Ordovician Kope Formation of ...

Introduction. Hawkins Impact Cave is the only cave in the world known to have formed inside the central uplift of a complex impact crater. Discovered in 1989 by landowner Michael Hawkins (namesake) and mapped in 2003 [1], HIC lies in the core of the central uplift of the 3.8 km diameter Flynn Creek impact structure (36˚17'N, 85˚40'W) in the Highland Rim physiographic province of north-central T...

This report provides oxygen isotopes from apatite of late Middle and Late Ordovician conodonts the southern Holy Cross Mountains in south-eastern Poland. It was a unique time interval characterised by significant change climate, tectonic, ocean chemistry. In early Ordovician, were located mid-latitude climatic zone at southwestern periphery Baltica; therefore, δ18Oapatite values this region pro...

s with Programs, v. 13, p. 491. LASK, P.B., 1993, The hydrodynamic behavior of sclerites from the trilobite Flexicalymene meeki: PALAIOS, v. 8, p. 219–225. MILLER, K.B., BRETT, C.E., and PARSONS, K.M., 1988, The paleoecologic significance of storm-generated disturbance within a Middle Devonian muddy epeiric sea: PALAIOS, v. 3, p. 35–52. PIPER, D.J.W., and STOW, D.A.V., 1991, Fine-grained turbid...

This is the first description of Ordovician cephalopods from Morocco. Although their occurrence has been known for a long time, only a poorly preserved conch from the late Katian of Ikhf n’Ouzerg (central Anti-Atlas) was described as “Orthoceras hastile Barrande” by Termier & Termier (1950). In some cases Ordovician cephalopods were mentioned within faunal lists without classification (e.g., Gu...