Sedimentary architecture of basinal Fort Payne (Mississippian) deposits: Mixed carbonate-clastic channels and Waulsortian-like mounds

2015 ◽  
pp. 245-266
Author(s):  
Jeannette Wolak ◽  
Larry Knox ◽  
Audrey Pattat ◽  
Randal Roberson ◽  
Bryan Blackburn
Keyword(s):  
Sedimentary Architecture ◽  
Mixed Carbonate

Synthesis of carbonate esters by carboxymethylation using NaAlO2 as a highly active heterogeneous catalyst

2018 ◽  
Author(s):  
Sreerangappa Ramesh ◽  
Kiran Indukuri ◽  
Olivier Riant ◽  
Damien Debecker
Keyword(s):  
Heterogeneous Catalyst ◽  
Dimethyl Carbonate ◽  
Sodium Aluminate ◽  
High Yield ◽  
Solid Catalyst ◽  
Highly Active ◽  
Aromatic Alcohols ◽  
Green Conditions ◽  
Mixed Carbonate

<p>Sodium aluminate is presented as a highly active heterogeneous catalyst able to convert a range of alcohols into the corresponding mixed carbonate esters, in high yield and under green conditions. The reaction is carried out using dimethyl carbonate both as a reactant and solvent, at 90°C. Allylic, aliphatic and aromatic alcohols are converted in good yields. The solid catalyst is shown to be truly heterogeneous, resistant to leaching, and recyclable. </p>

Crinoids from the Muldraugh Member of the Borden Formation in north-central Kentucky (Echinodermata, Lower Mississippian)

2000 ◽  
Vol 74 (6) ◽  
pp. 1072-1082 ◽  
Author(s):  
William I. Ausich ◽  
Alan Goldstein ◽  
Ron Yates
Keyword(s):  
United States ◽  
New Species ◽  
Rank Order ◽  
Species Abundance ◽  
North Central ◽  
First Report ◽  
Eastern Side ◽  
Borden Formation ◽  
Depositional Setting ◽  
Mixed Carbonate

A new late Osagean (Lower Mississippian) crinoid fauna is described from the Muldraugh Member of the Borden Formation of central Kentucky. The Muldraugh Member records a mixed carbonate-siliciclastic tempestite-dominated ramp environment. This is the first report of late Osagean crinoids from this depositional setting on the eastern side of the Eastern Interior Basin of the midcontinental United States. The Muldraugh crinoid fauna contains 66 species and is dominated by advanced cladids. This fauna has similarities to other late Osagean faunas but is distinctive both in species abundance and rank order abundance of species. Eight new species are described from this fauna, includingCamptocrinus nudus, Paradichocrinus ramus, Poteriocrinites horowitzi, Parascytalocrinus pentagonus, Abrotocrinus debrae, Abrotocrinus springeri, Worthenocrinus hardinensis, andMespilocrinus myllos.

Sign in / Sign up

Export Citation Format

Share Document