1. There are many areas of the world where rocky terrain or magnetic minerals would frustrate the magnetometers. 2. These include carbon compounds, magnetic minerals and more complex hydrocarbons similar to those deposited by Earth bacteria. 3. Avoid iron rich deposits when using a compass, for example, certain rocks which contain magnetic minerals , like Magnetite. 4. Tarduno and his team determined where the volcanoes formed by analyzing the rock for the magnetic mineral magnetite. 5. Experts called it paleomagnetism and found that the tiny compasses were often made of magnetite, a naturally magnetic mineral . 6. This is possible as magnetic minerals precipitate in the melt ( crystallize ), they orient themselves with Earth's magnetic field. 7. Magnetic minerals trapped inside ancient rocks have recorded hundreds of these so-called polarity reversals in the past 500 million years.8. Furnaces, fireplaces and kilns may have a strong magnetic anomaly because a thermoremanent magnetization has been baked into magnetic minerals . 9. In the latest work, the researchers examined grains of magnetic minerals within the meteorite, each about one-250th of an inch long. 10. Strongly magnetic minerals have properties that depend on the size, shape, defect structure and concentration of the minerals in a rock.
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