According to Minerals.net, talc – the softest mineral on earth – is found worldwide. In the United States, important talc deposits are present in Vermont, Pennsylvania, Maryland, North Carolina and Montana.Know More
Talc is number 1 on the Mohs hardness scale and can be easily scratched with a fingernail. The mineral in its powdered form is associated with some health concerns, including a rare breathing disorder.
"Although solid forms of talc are assumed to be safe, and most concerns are only after prolonged exposure, it is advisable to wash hands after handling talc," Minerals.net states. In its mineral form, talc "has a greasy feel" and may be "lightly fluorescent."Learn more about Earth Science
According to My Gold Panning, gold is found throughout the Earth, generally inside quartz veins located in rock and granite. Most gold has eroded, and it is often located in crevices in the rocks.Full Answer >
Magnesium is almost always found in compound form in nature, with the most abundant source being ocean water. Normally, magnesium is found as magnesite, which is magnesium carbonate, or dolomite. In seawater, magnesium is the third most abundant mineral behind both sodium and chloride.Full Answer >
Aluminum can be found throughout the earth's crust, but it is most commonly extracted from bauxite ore. Because it is so soft in its pure form, most aluminum used for commercial purposes consists of alloys made from refined bauxite mixed with stronger materials.Full Answer >
Glossopteris fossils are found throughout India, South America, southern Africa, Australia and Antarctica. They are a key piece of evidence for the theory of a southern supercontinent and continental drift. Assembling the continents of the southern hemisphere into a single land mass shows a linear, continuous distribution pattern of Glossopteris across continental boundaries. Edward Seuss was the geologist who theorized the existence of a southern supercontinent, which he called Gondwanaland.Full Answer >