Mineralogic, chemical, and oxygen and hydrogen isotope compositions of 15 different phyllosilicate samples from Permo– Pennsylvanian-age paleosols of the eastern shelf of the Midland basin of Texas and the southern Anadarko basin are presented. Mixtures of 2 :1 phyllosilicates and kaolinite dominate most samples, although some samples consist of relatively pure 2 :1 phyllosilicates. Chemical an...

Abstract To understand the timing of deglaciation northernmost marine-terminating glaciers Cordilleran Ice Sheet (CIS), we obtained 26 10 Be surface-exposure ages from glacially scoured bedrock surfaces in Prince William Sound (PWS), Alaska. We sampled six elevation transects between sea level and 620 m spanning a distance 14 to 70 km along ice flow paths. Most transect age–elevation patterns c...

Abstract The thermal effect caused by deep magma intrusion can not only accelerate the metamorphism of coal body, but also bring additional field that changes mechanical environment seams, thereby affecting permeability seams. Different from shallow resources, resources are in a characterized limited stress and strain. Thus, has more significant influence on distribution characteristics In this...

Abstract The low to medium-rank Tertiary coals from Meghalaya, India, are explored for the first time their comprehensive microstructural characterization using FTIR and Raman spectroscopy. Further, results these compared with Permian medium high-rank understand restyling during coalification its controls on hydrocarbon generation. coal samples grouped based mean random vitrinite reflectance va...

Abstract Reconstructing intermediate and bottom‐water temperature in the Arctic Ocean is key for understanding paleoclimatic phenomena, such as region's interactions with warm Atlantic waters, stratification, sea‐ice dynamics. However, benthic proxy archives are sparse throughout circle compared to lower latitudes. Trace‐element ratios (E/Ca) derived from ostracodes, a group of bivalved microsc...

The variations in assemblages of calcareous nannofossils are tracked the Dakhla and Tarawan Formations exposed at Gebel Nezzazat (central Sinai, Egypt). Five nannofossil biozones, namely NP2/3, NP4, NP5, NP6, NP7/8 identified. A distinct marker bed related to Latest Danian Event (LDE) occurs within Fm. earliest representative fasciculiths, Lithoptychius schmitzii, first just below LDE is follow...

Ice wedges are a characteristic ground ice feature in permafrost regions that form primarily from the meltwater of seasonal snowpack. Ice-wedge oxygen and hydrogen stable isotopes have been used winter paleotemperature reconstructions; however, until recently, ion geochemistry has rarely analyzed as potential paleoclimate proxy. This is greatest for located coastal regions, where marine aerosol...

Abstract Here we provide the first chironomid record and associated summer air-temperature (T VII ) reconstruction between ca. 16,800–9100 cal yr BP from Lake Saint Anne (SZA), situated in Eastern Carpathians. SZA was formed by youngest volcanic eruption of Ciomadul volcano at 29,600 BP. Our main goals this study are to test whether warming after Heinrich event 1 (H1; 16,200 BP) had similar amp...

The subject of the study is yedoma i.e. perennially frozen organic-bearing ("1–2% Corg) and ice-rich (containing 50–90 vol. % excess ice) silty, sandy loam fine sand deposit Late Pleistocene age. Yedoma with multi-stages syngenetic ice wedges (up to 15–20 meters high up 3.5 m wide) aged from 11.7 50 cal. ca BP often saturated rock debris gravel inclusions in intermountain basins river deltas. m...