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The dissolved materials in seawater are thought to originate from what?
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The dissolved materials in seawater are thought to originate from?
outgassing of elements from Earth's interior.
Do many hot springs have dissolved minerals in them?
Hot water is able to hold dissolved solids such as minerals. These minerals are thought to give hot springs their therapeutic properties.
What is the circular motion of heated materials thought to be driving force of plate tectonics?
Convection / Magma
Where does the heat in the center of the earth come from?
The heat at the centre of the earth is thought to be caused by the decay of radioactive materials, such as uranium, thorium and possibly an isotope of potassium. However this is currently not confirmed.
What are the ore minerals form?
After the oceans formed; you could imagine that the water was full of all sorts of materials, which were dissolved from the rocks as the waters slowly filled up the oceans, when the earth cooled sufficiently for large volumes of water to accumulate. The dissolved materials included a lot of iron salts (probably iron chloride and iron sulphate); as well as the soduim chloride still present today. The first forms of life that developed are thought to be bacteria (similar to today's blue-green algae). They didn't require oxygen, but converted carbon dioxide and water to sugars using sunlight; much like todays plants. Oxygen was actually a waste product, so they excreted it (blue green algae still do this today). Conditions were ideal for them, so they multiplied rapidly, and had the oceans mostly to themselves for hundreds of millions of years. The oxygen they gave off reacted with the dissolved iron salts in the water to form iron hydroxides and iron oxides. These materials are insoluble; so they settled to the bottom. It took millions of years for the oxygen to react with all the dissolved iron, and very thick deposits formed. These can still be seen today, and are called 'banded iron formation'. Finally, when most of the iron had been precipitated out of the water, there was an excess of oxygen, which was partly dissolved in the water, and then also passed into the atmosphere, enabling marine and terrestrial oxygen requiring life forms to develop. This where the oxygen in the atmosphere came from; and if it weren't for the early cyanobacteria, life on earth would not exist. Over time, the large deposits of iron rich sediments were moved and changed because of the movements of the crustal plates, and they eventually formed large deposits of magnetite and haematite, which make up most of the world's iron ore deposits. That is why most iron ore deposits are found in ancient rock formations.
The dissolved materials in seawater are thought to originate from?
outgassing of elements from Earth's interior.
The dissolved materials in seawater are thought to originate from chemical weathering of rocks on the continents and also from?
The second source of elements found in seawater is from the Earth's interior. Through volcanic eruptions, large quantities of water vapor and other gases have been emitted during ,uch of geologic time. This process is called OUTGASSING
What continent did people originate from?
Thought to be Africa
It Irish. It has no specific meaning. thought to originate from Joan?
Siobhán?
Where did love originate?
It's thought to have originated in Provence with the troubadours.
Where did exclamation marks and questions marks get their names from?
Question mark is thought to originate from the Latin quaestiō meaning question. Exclamation mark is also thought to originate from the Latin exclamation of "joy".
How did the word Mongol originate?
It is thought to have come from the Mongolian word for 'brave.'
Conscious thought processs and all intellectual functions originate in the?
Cerebrum
Where did courtly love originate?
It's thought to have originated in Provence with the troubadours.
What country did the name Benjamin come from?
The name is thought to originate among Isrealites that lived in Egypt. This name could be said to originate from Egypt.
How did the idea for floppy disks originate?
someone thought of an easier way to get music
Where do cookies originate from?
It is thought that the first gingerbread was made by Catholic monks in Europe.
