Results 181 to 190 of about 197,145 (380)
NEW YORK ACADEMY OF SCIENCE. SECTION OF GEOLOGY AND MINERALOGY [PDF]
, 1903 Gail Finlay
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The Depositional Record, EarlyView.With the aid of a chronologically well‐constrained stratigraphy, facies and sequence analyses were carried out on three drill‐cores obtained from estuarine macrotidal flats. The sequence analysis of the late Quaternary tidal deposits shows that four transgressions occurred in multi‐sequential order, whereas the intervening regressive phases were much ...
Serin Lim +4 more
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EVOLUTION OF CHEMICAL COMPOSITION AND CRYSTAL MORPHOLOGY OF AEGIRIN DURING FORMATION OF THE VISHNEVOGORSK ALKALINE CARBONATITE COMPLEX (SOUTH URALS) [PDF]
Минералогия, 2018 The chemical composition and crystal morphology of aegirine changed during formation of the Vishnevogorsk alkaline carbonatite complex. Fenitization of host metamorphic rocks, early vein syenites and pegmatites resulted in crystallization of pyroxenes ...
E.P. Makagonov +2 more
doaj
The Empirical and Radiative Transfer Hybrid (EaRTH) Disk Model: Merging Analyses of Protoplanetary Dust Disk Mineralogy and Structure [PDF]
arXivOur understanding of how exoplanets form and evolve relies on analyses of both the mineralogy of protoplanetary disks and their detailed structures; however, these key complementary aspects of disks are usually studied separately. We present initial results from a hybrid model that combines the empirical characterization of the mineralogy of a disk, as
arxiv
The Cosmic Crystallinity Conundrum: Clues from IRAS 17495-2534
, 2008 Since their discovery, cosmic crystalline silicates have presented several challenges to understanding dust formation and evolution. The mid-infrared spectrum of IRAS 17495$-$2534, a highly obscured oxygen-rich asymptotic giant branch (AGB) star, is the ...
Alan G. Whittington +28 more
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The Depositional Record, EarlyView.Abstract We very much appreciate the comments of André; Pestilho and Agustin Mors on our paper discussing the early diagenesis of the Pre‐salt carbonates (Barra Velha Formation, BVF) in the Santos Basin (Gomes et al., 2024). We welcome the opportunity to respond and to clarify our interpretations concerning dolomite formation, diagenetic timing and ...
João Paulo Borges Gomes +6 more
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MANUAL OF DETERMINATIVE MINERALOGY, WITH AN INTRODUCTION ON BLOWPIPE ANALYSIS. [PDF]
, 1899 Joseph W. Richards
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The Depositional Record, EarlyView.The Upper Permian Castile Formation of the Delaware Basin, a 515.3 m (1690.6 ft) thick deep‐water evaporitic sequence dominated by anhydrite and halite, is the focus of this study. This study's sedimentological and geochemical analysis of cores from the basin's centre and margin reveals that dynamic reflux of deep hypersaline brines significantly ...
Ander Martinez‐Doñate +6 more
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Elements of Mineralogy, Crystallography and Blowpipe Analysis from a Practical Standpoint [PDF]
, 1910 Charles Palache
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