Summer has the most daylight
Cities such as Geneva, Switzerland; Brussels, Belgium; and Washington, DC, are considered global cities primarily due to their influence in world government
Answer:
No
Explanation:
Gold is primarily found as a pure, native metal. Sylvanite and calaverite are gold-bearing minerals. Gold is usually found embedded in quartz veins, or placer stream gravel. It is mined in South Africa, the USA (Nevada, Alaska), Russia, Australia, and Canada. Quartz is a type of igneous rock and Sylvanite and calaverite are a type of rare metal, which when heated, leaves behind gold or gold-silver. So, simply put, no, you cannot find gold in sedimentary rocks.
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The atmospheric layer represented by F is called the ionosphere. It is the upper layer of the earths atmosphere. It is ionized by solar radiation which has an electrical charge. Radio waves can be broadcast all over the world due to the radio waves reaching the ionosphere and reflecting back.
