Volcanic Impacts
Monday, March 14, 2016
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Hi guys so I decided that not everyone knows what volcanic eruptions and magma and a ton of other volcanic related things look like so this post is going to show you that .
Sunday, March 13, 2016
Volcanic Ash
Volcanic ash can have a detrimental impact on the environment which can be difficult to predict due to the large variety of environmental conditions that exist within the ash fall zone. Natural waterways can be impacted in the same way as urban water supply networks. Ash will increase water turbidity which can reduce the amount of light reaching lower depths, which can inhibit growth of submerged aquatic plants and consequently affect species which are dependent on them such as fish and shellfish. High turbidity can also affect the ability of fish gills to absorb dissolved oxygen. Acidification will also occur, which will reduce the pH of the water and impact the fauna and flora living in the environment. Fluoride contamination will occur if the ash contains high concentrations of fluoride. Ash accumulation will also affect pasture, plants and trees which are part of the horticulture and agriculture industries. Thin ash falls (<20 mm) may put livestock off eating, and can inhibit transpiration and photosynthesis and alter growth. There may be an increase in pasture production due to a mulching effect and slight fertilizing effect, such as occurred following the 1980 Mount St. Helens and 1995/96 Mt Ruapehu eruptions. Heavier falls will completely bury pastures and soil leading to death of pasture and sterilization of the soil due to oxygen deprivation. Plant survival is dependent on ash thickness, ash chemistry, compaction of ash, amount of rainfall, duration of burial and the length of plant stalks at the time of ash fall.The acidic nature of ash will lead to elevated soil sulfur levels and lowered soil pH, which can reduce the availability of essential minerals and alter the soil’s characteristics so that crops and plants will not survive. Ash will also impact upon arable crops, such as fruit, vegetables and grain. Ash can burn plant and crop tissue reducing quality, contaminate crops during harvest and damage plants from ash loading. Young forests (trees <2 years old) are most at risk from ash falls and are likely to be destroyed by ash deposits >100 mm. Ash fall is unlikely to kill mature trees, but ash loading may break large branches during heavy ash falls (>500 mm). Defoliation of trees may also occur, especially if there is a coarse ash component within the ash fall.
Land rehabilitation after ash fall may be possible depending on the ash deposit thickness. Rehabilitation treatment may include: direct seeding of deposit; mixing of deposit with buried soil; scraping of ash deposit from land surface; and application of new topsoil over the ash deposit.
Note
Hi guys sorry for not adding a post for a while so the next thing that I will be talking about is volcanic ash what it is and why its dangerous....
Monday, March 7, 2016
Viscosity
Ok so this is my last post for today and it is all about Viscosity
So to Wrap up the Crazy for right now I want to remind you all to check EVERY DAY BYE BYE
~Rebecca Davis~
Viscosity is the resistance to flow (opposite of fluidity). Viscosity depends on primarily on the composition of the magma, and temperature. Higher SiO2 (silica) content magmas have higher viscosity than lower SiO2 content magmas (viscosity increases with increasing SiO2 concentration in the magma).
Lower temperature magmas have higher viscosity than higher temperature magmas (viscosity decreases with increasing temperature of the magma). Thus, basaltic magmas tend to be fairly fluid (low viscosity), but their viscosity is still 10,000 to 100,0000 times more viscous than water. Rhyolitic magmas tend to have even higher viscosity, ranging between 1 million and 100 million times more viscous than water. (Note that solids, even though they appear solid have a viscosity, but it very high, measured as trillions times the viscosity of water). Viscosity is an important property in determining the eruptive behavior of magmas. So to Wrap up the Crazy for right now I want to remind you all to check EVERY DAY BYE BYE
~Rebecca Davis~
Chemicals in Magma
So what are the Different Types of Magma and their Crazy Chemical Compositions and Why do you Need to know about them???
~Rebecca Davis~
You need to know about the different compounds in Magma is because most people think that Magma is Just melted Rock I mean sure it comes from rocks and insane amounts of heat but it also has so many different Chemical Compounds such as-
Basaltic magma -- SiO2 45-55 wt%, high in Fe, Mg, Ca, low in K, Na
Andesitic magma -- SiO2 55-65 wt%, intermediate. in Fe, Mg, Ca, Na, K
Rhyolitic magma -- SiO2 65-75%, low in Fe, Mg, Ca, high in K, Na~Rebecca Davis~
Introduction
Hello Everyone nice to see some people reading this blog. So what I will be talking about through out the duration of this blog is The Chemical Composition of Magma and the impact on the Environment caused by volcanic eruptions and how they affect the environment around them a little bit before and the Long Lasting effects afterward.
~Rebecca Davis~
~Rebecca Davis~
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