Weathering

Water Quality Water is essential to human life and the health of the environment. Good water quality is essential for irrigation, drinking and recreation and also sustains ecological processes that support native fish populations, vegetation and bird life. We expect that our water supply will not only be safe, but will taste good, and look crystal clear. Water quality is commonly defined by its physical, chemical, biological and aesthetic (appearance and smell) characteristics. Water quality…

Biomes are subsections of the biosphere, which are categorised based on areas with similar ecosystems. Typically, ecosystems are defined via similar vegetation, since this allows the development of subsequent food webs. A prime example of this is the Arctic biome, which is made up of low lying vegetation. Although not categorised by climate, it is intrinsically linked with the distribution of the world’s major biomes, as it is the underlying cause of what types of vegetation are able to inhabit…

the moon god Nanna. Built by the king of Ur, this was the first ziggurat the sumerians had ever created. Later in the 6th century BCE, king Nabonidus of Ur replaced the upper two terraces. Because it was built using mud bricks, we can infer that weathering and erosion took its toll on the ziggurat, and it had to be replaced and maintained every couple hundred years. When the sumerian population died out, the ziggurat was left…

Across the barren desert, eyes gaze upon anyone who comes across its path. Baring the face of a supposed killer, standing tall and mighty, always ready to strike. Protecting a lifelong mystery, waiting to be uncovered. There are a lot of unexplained mysteries and phenomenon in history. One of the most sacred and mysterious of all is the Sphinx. Theories of this creation range from being the resting place for the god Osiris, and the tomb of the Pharaoh Khafre but, the most realistic and…

both practitioners of Voodoo and interested tourists (Nickell). The tomb itself has been vandalized countless times—it is covered in small markings, graffiti, and until recently, pink latex paint (Webster). The tomb is also very worn by natural weathering—much of the plaster has crumbled away revealing brick (Webster). Many of the markings are small X’s (usually in sets of three) (Webster). There exists a legend that Laveau grants a wish when someone interacts with her tomb (Guiley). The ritual…

recombinations and cross-linking reactions that are caused by photo-oxidation of polymers. Polymers are considered to get weathered due to the direct or indirect impact of heat and ultraviolet light. The effectiveness of the stabilizers against weathering depends on solubility, ability to stabilize in different polymer matrix, the distribution in matrix, evaporation loss during processing and use. The effect on the viscosity is also an important concern for processing. Various stabilizers used…

source rocks it came from, but also a result of coastal processes that modify the sand over long periods of time” (Hadhazy). One beach sand may have a certain mineral composition due to some external factor, such as volcanic eruptions and/or the weathering and erosion of nearby rocks. Another beach sand could differ due to some internal factor, such as the chemical processes taking place in the water itself or the activity of its living organisms (Garrison and Ellis 140). These minerals may even…

The Boettcher collection at the Colorado Governor’s Residence contains several Carrara marble sculptures. The Palm room, the Palm Dining Room, and Well room hold a large amount of marble. It is apparent that the Boettchers were fond of Neo Classical Italian works and materials. Four marble sculptures in particular stand out based on their location, size, and the intricate carving details and motifs. This paper will focus on the symbolism and materials of the two marble console tables with…

Carbon­iferous rocks, spreading out between the layers of limestone, sandstone and shale. The magma cooled and solidified into a massive sheet of igneous rock, reaching thicknesses of up to 230 feet (70m). Although the Whin Sill has suffered erosion and weathering spanning millions of years, it is only partly exposed at the…

Toxicology Profile; Arsenic Basic Chemistry Introduction Arsenic is an abundant naturally occurring element with an atomic number of 33 and an atomic weight of 74.92 g. Although strictly a metalloid, arsenic is commonly referred to as a ‘heavy metal’ and can be found within group 4 of the periodic table. It should be noted that most of the other elements within this group have a biological role, but arsenic itself is a toxin (see section 1.x). Some additional chemical properties of elemental…