Banded iron formations are composed of alternating light and dark bands of chert.
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What is chert?</h3>
- Banded iron formations are made up of alternating light and dark chert bands.
- Chert is a sedimentary rock that forms in a variety of ways and is almost entirely composed of silica (SiO 2).
- When the siliceous skeletons of marine plankton are dissolved during diagenesis, silica precipitates from the resulting solution, biochemical chert is formed.
- Chert layers, which occur as irregular beds or rounded nodules within limestone formations, are common in eastern Kansas.
- Because it is harder than limestone, chert is more resistant to erosion.
- The Flint Hills' chert-topped hills are the result of the landscape's uneven erosion.
Therefore, banded iron formations are composed of alternating light and dark bands of chert.
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Answer:
Hay varias definiciones contradictorias para la geosfera. Puede ser tomado como el nombre colectivo de la litosfera, la hidrosfera, la criosfera y la atmósfera. Los diferentes colectivos de la geoesfera son capaces de intercambiar diferentes flujos de masa y/o energía. El intercambio de estos fundentes afecta al equilibrio de las diferentes esferas de la geoesfera. Un ejemplo es cómo el suelo actúa como parte de la biosfera, mientras que también actúa como una fuente de intercambio de flujo.
Explanation:
Answer:
Unitary
Explanation:
In a unitary form of government, all the power rests in a central government. The country may be divided into states or other sub-units, but they have no power of their own
Barrier defence
Artificial rivers made