Title : Discordant K - Ar and Young Exposure Dates for the Windjana sandstone

Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X‐ray diffraction of the Windjana sample (Kimberley area, Gale Crater)

The Windjana drill sample, a sandstone of the Dillinger member (Kimberley formation, Gale Crater, Mars), was analyzed by CheMin X-ray diffraction (XRD) in the MSL Curiosity rover. From Rietveld refinements of its XRD pattern, Windjana contains the following: sanidine (21% weight, ~Or95); augite (20%); magnetite (12%); pigeonite; olivine; plagioclase; amorphous and smectitic material (~25%); and...

Life Skills Instruction, Non-addicted, Substance Use, Coping Skills, Discordant Women

Article history: Received date: 28 August, 2016 Review date: 7 October 2016 Accepted date:25 October 2016 Printed online:1 September Purpose: The initiation of anti-bullying movements in school’s dates back to nearly three decades ago in some countries. Despite the importance of such a movement and its grave implications for education systems, no particular program or action has been...

TYPE N / A 3 . DATES COVERED - 4 . TITLE AND SUBTITLE Rapidly

Do Radioisotope Clocks Need Repair? Testing the Assumptions of Isochron Dating Using K-Ar, Rb-Sr, Sm-Nd, and Pb-Pb Isotopes

The assumptions of conventional whole-rock and mineral isochron radioisotope dating were tested using a suite of radioisotopes from two Precambrian rocks. Amphibolite from the Beartooth Mountains of Wyoming shows evidence of thorough metamorphism by isochemical processes from andesite by an early Precambrian magma-intrusion event. A diabase sill, exposed within the wall of Grand Canyon at Bass ...

Modeling the statistical distributions of cosmogenic exposure dates from moraines

Geomorphic process modeling allows us to evaluate different methods for estimating moraine ages from cosmogenic exposure dates, and may provide a means to identify the processes responsible for the excess scatter among exposure dates on individual moraines. Cosmogenic exposure dating is an elegant method for estimating the ages of moraines, but individual exposure dates are sometimes biased by ...