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vodomira [7]
2 years ago
10

When scientists discuss the great oxygenation event, they are referring to a time when?

Geography
1 answer:
artcher [175]2 years ago
4 0

When scientists discuss the great oxygenation event, they are referring to a time when the transition from the mildly reducing Archean atmosphere-ocean system to the oxygenated atmosphere and shallow oceans of the early Paleoproterozoic that started between ~2.4 and 2.3 Ga and ended between 2.1 and 2.0 Ga.

  • here The Great Oxidation Event, also called the Great Oxygenation Event, the Oxygen Catastrophe, the Oxygen Revolution, and the Oxygen Crisis, was a time interval when the Earth's atmosphere and the shallow ocean first experienced a rise in the amount of oxygen.
  • in this event Gradually, the accumulated oxygen started escaping into the atmosphere, where it reacted with methane. As more oxygen escaped, methane was eventually displaced, and oxygen became a major component of the atmosphere.
  • The Great Oxygenation Event (GOE) was the creation of free oxygen in our atmosphere. It was caused  by cyanobacteria doing photosynthesis

to know more about photosynthesis click here

brainly.com/question/26494694

#SPJ4

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Moraines are composed of jumbled piles of very poorly sorted rock fragments ranging in size from boulder to clay that fall out n
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Explanation:

When a mountain glacier start moving from mountain towards valley it creates some sorts of landforms by following some methods like abrasion, attrition etc. Moraine formed as a depositional land form in front, back, parallel and side pf a glacier. It refers to the accumulation of sediments ranging from large boulders to small particles at the front or at the end of a glacier.

The large boulders do not break down in smaller partcles as the followed the process of abrasion where friction takes place between glacier and its valley floor. Unless and untill the collision between two large boulders occur the boulders would not broke down.  

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