Abstract Traditionally, the strata of Luonie Valley, Dechang County, SW Sichuan, China, are considered to contain a suite felsic volcanic rocks (the Huili Group) that erupted after c. 1050 Ma. However, we report here new age constraints, elemental and Lu–Hf isotope geochemistry for different older basaltic agglomerate lava, tuff lava basalt from same area, which name Formation. New dating resul...

The 2018, subaerial eruption of Kīlauea volcano, Hawaii, resulted in a 5-km-long stretch coastline that actively drained lava into the ocean. Nutrients were added to surrounding ocean through dissolution basaltic rock and thermal upwelling deep water, thereby fueling large phytoplankton bloom. Lava-impacted, surface seawater had high suspended particle loads, concentrations chlorophyll, silicic...

Venusian lava channels have meander dimensions that relate to their mode of formation. Their meander properties generally follow terrestrial river trends of wavelength (L) to width (W) ratios, suggesting an equilibrium adjustment of channel form. Slightly higher L/W for many Venusian channels in comparison to terrestrial rivers may relate to nonaqueous flow processes. The unusually low L/W valu...

Introduction: The Cerberus region of Mars has numerous geologically recent fluvial and volcanic features superimposed spatially, with some of them using the same flow channels and apparent vent structures [1, 2]. Lava-water interaction landforms such as psuedocraters suggest some interaction of emplacing lava flows with underlying ground ice or water (e.g. [1, 3]). This study investigates a rel...

The Harachiyama Formation comprises Lower Cretaceous volcanic rocks, which are distributed in the eastern margin of Kitakami Mountains northeastern Japan. Whole-rock chemical analysis, U–Pb zircon dating and Hf isotope analysis were performed to constrain formation age magmatic origin was discussed. lava tuff samples from Omoto Tsukue areas supported island-arc rhyolitic rocks (SiO2 content > 7...

[1] Clusters and coalesced complexes of domes represent a relatively rare landform within the extensive, low-relief, lunar maria. While they are typically spectroscopically similar to mare basalts emplaced by high-volume, low-viscosity eruptions, the large-scale morphology of the domes is more consistent with slower emplacement and/or more viscous magma. We use new Earth-based radar data to stu...

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[1] Accurate lava flow unit thicknesses estimates are necessary to place constraints on volcanic flux estimates. We refine the technique of using the shape of crater size-frequency distribution (CSFD) curves to estimate the thickness of individual lunar mare flow units. We find that a characteristic knee often observed in CSFD curves is reasonably interpreted to represent the presence of two la...

[1] Spring systems on the west slope of the Oregon High Cascades exhibit complex relationships among modern topography, lava flow geometries, and groundwater flow patterns. Seven cold springs were continuously monitored for discharge and temperature in the 2004 water year, and they were periodically sampled for dO, dD, tritium, and dissolved noble gases. Anomalously high unit discharges suggest...