A number of rivers have been found to transport highly aged organic matter [OM]; however, the sources of this aged material remain a matter of debate. One potential source may be erosion and weathering of headwater lithologies rich in ancient sedimentary OM. In this study, waters, suspended particulates, streambed sediments, rocks and soils from fourteen small headwater watersheds of a mid-size...

1 State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, 2 Laboratory for Marine Geology, Qingdao National Oceanography Laboratory for Science and Technology, Qingdao, China, 3 Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, 4 Departame...

Introduction: The shergottite meteorites have been subdivided into three groups based on texture and mineralogy [1]. EETA79001 is a shergottite that contains examples of all three lithologies: lherzolitic (lithology X), olivine-phyric (lithology A), and basaltic (lithology B). Therefore, studying the magmas involved in the petrogenesis of EETA79001 may provide information not only on its own pe...

a Limnological Research Center, Department of Geology, University of Minnesota, Minneapolis, MN, 55455, United States b University of Maryland Center for Environmental Science, Appalachian Laboratory, Frostburg, MD, 21532, United States c Departments of Plant Biology and Geology, University of Illinois, Urbana, IL, 61801, United States d Department of Geology, Brown University, Providence RI, 1...

The unsaturated zone is a critical component of karstic groundwater systems and shown to provide substantial storage capacities. Understanding the spatial patterns controls on flow path activation often challenge. Previous research focused remotely sensed data or inferential analyses quantify these patterns. Here, we use two cave systems—one in Arizona, USA second Kentucky, USA—to show value su...

The lowstand extensions of two fluvial systems from the Cascadia subduction margin are investigated using high-resolution seismic reflection data to determine relative controls on paleodrainage morphology. We document distinct differences between systems, located ~40 km apart, attributed underlying structure and lithology, shelf gradient, drainage basin characteristics. A cross-shelf valley exi...

The nature of source rocks of basaltic magmas plays a fundamental role in understanding the composition, structure and evolution of the solid earth. However, identification of source lithology of basalts remains uncertainty. Using a parameterization of multi-decadal melting experiments on a variety of peridotite and pyroxenite, we show here that a parameter called FC3MS value (FeO/CaO-3*MgO/SiO...