Introduction: Ancient, variably salty, friable, basaltic sedimentary beds with relatively uniform grain sizes and prominent, remarkably shallow crossbedding have now been imaged at the Martian surface by all three Mars rovers, Spirit (MER1), Opportunity (MER2), and Curiosity (MSL). Where they have been found, these beds overlie other, older rocks. Owing to alleged analogies with terrestrial sed...

original article   introduction: wind-turbine noise emission and its environmental impact are considerable issues nowadays. considering the importance of the issue, the purpose of this study was to prepare noise map and wind turbines sound characteristics on the largest wind farm of iran. method: this study was carried out in two phases:1) in order to prepare the daytime sound level (ld) noise ...

Abstract Aquatic ecosystems provide vital services, and macrophytes play a critical role in their functioning. Conceptual models indicate that shallow lakes, plants with different growth strategies are expected to inhabit contrasting habitats. For peat characterized by incohesive sediments, roles of forms, life-history environmental factors determining the occurrence aquatic vegetation remain u...

Most soils on the Columbia Plateau are derived from windblown sediments deposited over the last 15,000 years, although dust deposition has been ongoing in the region for two million years resulting in loess deposits up to 75 m (250 ft) thick. Many of the soils contain significant amounts of fine particulates and if exposed when dry can produce massive clouds of dust during high wind events that...

x-ray absorption fine structure (xafs) spectroscopy was used to identify directly the metal speciation and local bonding environment of fe in sediments originated from dobczyce reservoir (poland); special attention was paid to analysis of samples collected from points situated at different distances from the land. the combination of traditional approach to data analysis as well as usage of mult...

Twelve surface sediments from the southern Okinawa Trough (OT) and nine surface sediments from a nearby river, the Lanyang River (LR), with high sediment discharge were analyzed for comparison of their aliphatic hydrocarbon distributions. Performing cluster analysis on all hydrocarbon data of LR and OT sediments showed that the two areas had a similarity level of only 0.15, meaning that they we...

This paper concerns the study of ripples that occur on windward Barchan dunes from field Najaf governorate, Iraq. These consist mainly sand sediments with variable sizes, including medium, fine, and very fine sands. Quartz represents major light mineral in Dunes sand. The prevailing wind direction area is NW-SE. ripple crest series every pattern are oriented perpendicular to NW-SE direction, wh...

Although freshwater and marine systems both receive light and heat energy from the sun and are mixed by the wind, only marine systems receive additional mechanical energy from the tide. This input is very small relative to the flux of solar energy but may exceed that from wind. Some obvious physical consequences of this additional energy input include the development of intertidal habitats, the...

The characterisation of mineral dust at emission sources is essential for quantifying the wider-scale environmental impacts has, as well improving its incorporation in modelling. Methods sampling sediments these source areas purposes are varied and can produce different representations emitted dust. This study systematically compared characterisations from three established approaches estimatin...

In coastal marine sediments, denitrification and fermentation are important processes in the anaerobic decomposition of organic matter. Microbial communities performing these two processes were enriched from tidal marine sediments in replicated, long term chemostat incubations at 10 and 25°C. Whereas denitrification rates at 25°C were more or less stable over time, at 10°C denitrification activ...