Soil is a key carbon reservoir balancing global budget and regulating climate change. Barren soils in karst zones have weak capacity for soil water conservation are readily erodible, making the biogeochemical processes within potentially rapid complex. To explore vertical variation of under conditions its response to land-use change, this study investigated concentrations isotopic compositions ...

Fe-bearing minerals are a tiny fraction of the composition speleothems. They have their origin in karst system or transported from drainage basin into cave. Recent studies on magnetism speleothems focused variations magnetic mineralogy specific time intervals and usually limited to single sample. In this study, we describe database environmental parameters built 22 stalagmites different caves l...

in this study we report the rock magnetic properties of surface soil samples and their spatialvariability from the northernmost district of kerala to understand pedogenic processes and soil erosion. themagnetic signal is mainly from fine grained pedogenic magnetite as other sources like anthropogenic andlithogenic magnetite, bacterial magnetite and greigite are absent. the surface soil samples ...

Magnetic paleoclimatic records often represent mixed environmental signals. Unmixing these signals may improve our understanding of the paleoenvironmental information contained within these records, but such a task is challenging. Here we report an example of numerical unmixing of magnetic hysteresis data obtained from Chinese loess and red clay sequences. We find that the mixed magnetic assemb...

The wetland Argialbolls pedon was chosen to investigate the effects of pedogenic processes and anthropogenic activities on the vertical distribution of lead and mercury concentration and to assess the potential use of soil as an archive of atmospheric Pb and Hg pollution. The soil was sampled from 5 cm from the surface to a depth of 90 cm at two locations in the Sanjiang Plain in northeastern C...

This report describes the results of a comprehensive surficial geologic mapping effort undertaken to support the development of a series of relative flood hazard maps of the Ivanpah Valley area, Clark County, Nevada. The study area spans approximately 1030 km2 (398 mi2) and is defined by all of three and part of one internally drained basins between Las Vegas and Primm, Nevada. The proximity of...

The world's oldest known stone tools discovered at the Pliocene site of Lomekwi 3 (LOM3) in Nachukui Formation, northern Kenya, signals a prodigious behavioral change hominin lineage. LOM3, dated to 3.3 Ma, is significantly earlier than first appearance genus Homo and coincides with onset Mid-Pliocene Warm Period, warranting new phylogenetic environmental explanations for origins tool making be...

Paleoclimatic investigation of loess-paleosol sequences from northern Iran is important for understanding past changes in a region highly sensitive to shifts precipitation, and along potential routes human migration. Here, we present carbon oxygen isotopic compositions bulk carbonate (? 13 C bc ? 18 O , respectively) coupled with particle size distributions samples the Mobarakabad section, Iran...