Right, to be more accurate, miners find large areas that contain nothing but copper, or slate. How come they are not found with loads of other materials, but with a large amount of the same substance. It seems strange hat when someone comes upon some iron ore, there would be a huge more amount in the same area.Did this happen when the earth was formed, and if so, why.If not, did it happen over time, and why.If anyone could explain this phenomenon to me, it owuld be greatly apprecitaed.Thanks, Tom
I wouldn't put anything on my tires that might in any way compromise their grip. There is the outside chance that even if you put some sort of tire dressing only on the sidewall of the tire, centrifugal force could cause it to travel to the tread. I've also seen car tires that the sidewall began to split on because of repeated use of a tire dressing product. just clean them with soapy water, rinse thoroughly, dry and ride, free from the worry of whether your tires will stick or not.
I also like Eagle One Tire Shine but if you read the small print it says its not for use on motorcycle tires. Most tire shines are not recommended for motorcycles tires because they are oil based formulas. Certainly something you don't want on your tread. I use them anyway but I don't spray it on. Dip your cloth or sponge into a bowl of tire shine and apply it that way, being careful to stay away from the tread edge by at least a quarter of an inch.
A lot of geological processes lead to the separation of materials. For example, sand at the beach originally comes from the destruction of rocks with all sorts of minerals, but these all separate out over time and end up in different places. Sometimes the mechanism of separation is physical, like in the beach example, and sometimes it is chemical, like in the formation of salt deposits or most orebodies. And these things do require a lot of time to happen in most cases.
After the earth's formation, differentiation followed. As usual, heavy elements sink while light things float. This is why same elements or compounds are found together, adding also the fact of bonding, chemical affinity (things we learned in chemistry). But earth is not static, replenishment and exploitation of materials, including the precious ones, happened because of geological processes like volcanism and subduction. These processes make differentiation start again.
Copper mines and other mines don't just contain the metal they are extracting. In copper mines for example, the concentration of copper is less than 1%. In a gold mine the concentration is measured in parts per million. Some larger mines have less than 2ppm gold! These metals are often present as a sulphide or oxide, not the metal we use. A mineable mineral deposit usually forms due to unusual geological circumstances that concentrate one or more metals at higher levels than background. Most were created at various times in the earth's history but essentially from the original materials from which the earth was formed. Metals are mobile within the earth due to temperature and pressure conditions and plate tectonics. For more information try pedia: search under the metal you are interested in.
