Recent content by Geology Erwin
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High School Zig Zag Star Movement in Singapore 2011
I don't think anything above the atmosphere could have caused what you saw. Others above have mentioned the reasons i would think of. However, I saw something similar years ago. It came even back for several days. It could not fathom what it was until one evening during a ground fogg just thick...- Geology Erwin
- Post #14
- Forum: Astronomy and Astrophysics
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Double Sun -- Mirage or Hoax or Physics
I took a very similar picture in 2014. It was indeed a double reflection in a window. I don't actually believe that you need a double paned window to obtain the effect, light will reflect on each air-glass or air-water interface. You just need to be in the exact correct place and focus...- Geology Erwin
- Post #21
- Forum: Earth Sciences
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Composting Process: Learn About Oxygen, Carbon, Hydrogen & Nitrogen
My composting experience is limited to the North Western Europe Climate but i would expect that there are great similarities. Theoretical considerations aside. When you start to compost you might want to consider practical stuff as well. Such as : 1) Where do you want the use the end products...- Geology Erwin
- Post #15
- Forum: Earth Sciences
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Contribution of mobile phones to global warming
Similar studies have been done for computers, i believe - find those and check where they got their data ? Do you look at the production of the cellulars etc... as well or just at the energy use ? I would expect that the use of cells has increased efficiency in production, transport and...- Geology Erwin
- Post #11
- Forum: Earth Sciences
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Soliciting Ideas for "Research Proposals" GeoPhysics
You could use electric properties of groundwater solutions tot model different types of groundwater in an aquifer. You could try to map the boundary zone between salt water and fresh water in a coastal dune system and see how it responds to climate and/or fresh water extraction. This would have...- Geology Erwin
- Post #10
- Forum: Earth Sciences
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How does lime flocculate clay soil
Lime does influence soil acidity trough its carbonate part. The acidity in turn affects the availability of nutrients to plants and the formation of aggregates in the soil. In Flanders (Belgium) farmers us lime to improve the macroporosity or structural porosity of heay clay soils. This is...- Geology Erwin
- Post #6
- Forum: Earth Sciences