Vol. 314, Issue 6, 2014 | Published by American Journal of Science

Science Paper
Revised Chronostratigraphy of the Lower Chinle Formation Strata in Arizona and New Mexico (USA): High-precision U-Pb Geochronological Constraints on the Late Triassic Evolution of Dinosaurs
Jahandar RamezaniDavid E. FastovskySamuel A. Bowring
The early history of dinosaurs in North America is obscured by an incomplete fossil record, taxonomic uncertainties and speculative correlations of tetrapod-bearing rocks, as well as poor calibration of the...
Science Paper
U-Pb Zircon Geochronology of Roxbury Conglomerate, Boston Basin, Massachusetts: Tectono-stratigraphic Implications for Avalonia in and Beyond SE New England
Margaret D. ThompsonJahandar RamezaniJames L. Crowley
High-precision CA-TIMS 206Pb/238U zircon dates from sandstone and Brighton igneous rocks associated with Roxbury Conglomerate in the Boston Basin, eastern Massachusetts provide constraints on the age and tectonic significance of...
Science Paper
Resistant Cellulose-Derivative Biopolymer Templates in Natural Sepiolite
S. LegueyA. I. RuizR. FernándezJ. Cuevas
Sepiolite is a fibrous sheet silicate with a composition of Si12Mg8 (H2O)4(Si6O15)2(OH)4 · 8H2O and has significant physicochemical and rheological properties due to the presence of zeolitic channels in its...