Vol. 317, Issue 5, 2017

Science Paper
Bridging the Gap Between the Foreland and Hinterland I: Geochronology and Plate Tectonic Geometry of Ordovician Magmatism and Terrane Accretion on the Laurentian Margin of New England
Paul KarabinosFrancis A. MacdonaldJames L. Crowley
U-Pb dates on magmatic and detrital zircon from samples in the hinterland of the Taconic orogen place new constraints on the timing and plate tectonic geometry of terrane accretion and...
Science Paper
Bridging the Gap Between the Foreland and Hinterland II: Geochronology and Tectonic Setting of Ordovician Magmatism and Basin Formation on the Laurentian Margin of New England and Newfoundland
Francis A. MacdonaldPaul M. KarabinosJames L. CrowleyEben B. HodginPeter W. CrockfordJohn W. Delano
Ordovician strata of the Mohawk Valley and Taconic allochthon of New York and the Humber margin of Newfoundland record multiple magmatic and basin-forming episodes associated with the Taconic orogeny. Here...
Science Paper
A Refined View of the Thermodynamic Mixing Quantities for Alkali Feldspars and the Quandary of Excess Configurational Entropy
Guy L. Hovis
Solution calorimetric measurements have been made at 50 °C in 20.1 weight percent HF for three alkali-feldspar ion-exchange series consisting of a total of fifty-five samples. Such a large number...