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Systematic position,distribution,and shell structure of the Devonian linguloid brachiopod Bicarinatina bicarinata (Kutorga,1837)
Brachiopoda Bicarinatina shell structure Middle Devonian Estonia Latvia Russia
2009/10/21
The type species of the brachiopod genus Bicarinatina Batrukova was first described by Kutorga in 1837 (Zweiter Beitrag zur Geognosie und Paläaontologie Dorpats und seiner nächsten Umbegebun...
Inferring Stratigraphic Position of Fossil Vertebrates from the Niobrara Chalk of western Kansas
Stratigraphic Position Niobrara Chalk western Kansas
2009/10/20
The stratigraphy of the Smoky Hill Chalk Member of the Niobrara Chalk of western Kansas is well understood as a result of the work of Hattin (1982) and Stewart (1988). Marker units identified by Hatti...
Rapid, Accurate Phase Quantification of Clay-Bearing Samples Using a Position-Sensitive X-Ray Detector
Absorption Correction Mudrocks Position-sensitive Detector Quantification X-ray Diffraction
2011/12/8
Abstract: The rapid phase quantification method using X-ray diffraction (XRD) with a position-sensitive detector (PSD), outlined by Cressey and Schofield (1996), has been extended to facilitate minera...
Origin and Position of Exchange Sites in Kaolinite: An ESR Study
Origin Position Exchange Sites Kaolinite ESR
2012/2/13
Electron spin resonance (ESR) spectroscopy is used to investigate the nature of exchange sites on kaolinite. ESR spectra of exchangeable Cu2+ and Mn2+ on kaolinite indicate that divalent exchange ions...
Variability in Exchange Ion Position in Smectite: Dependence on Interlayer Solvent
Variability Exchange Ion Position Smectite Interlayer Solvent
2012/2/15
Full and reduced charge smectite saturated with Na(I), Ca(II), Cu(II), or tetralkylammonium ions were swollen by a series of solvents of various bulk physical properties. In the full charge smectites,...