|
This is a free sample preview of the essay
Banded Iron Formations And The
Beginning of essay
Banded Iron Formations and evolution of the atmosphere
The time between the formation of the earth and the beginning of the Cambrian(about 570mya) is a 4000 my long period known as the Precambrian, this includes approximately 90% of geological time of which we know very little about as pre-Cambrian ....
Middle of essay
....cally banded chemical sediments of large, open water bodies that take different aspects but most characteristically consists of alternating layers of iron- rich and iron-poor silica. It is present in some of the oldest volcanic sequences (greenstone belts ca 2800 mya) and is a common sediment type formed until approximately 1800 mya. Although some younger formations with similar structure can be found there is great distinctions between them and the BIF’s of the Precambrian.
The BIF’.... |
| Number of words: 1256 |
Approximate pages: 5 |
|
Need help with writing your essay? Sign up today to view the rest of this paper and get unlimited access to over 45000 other essays just
like it. Some other sites charge you for each essay, but here at EssayPal we give you full access to our entire database for one low subscription
fee. Thousands of other students around the world have realized what an affordable deal this is and have become members. Come see what
you are missing out on. Once you've become a member, you will not go back to the other term paper sites either.
| Length |
Type |
Price |
PayPal |
| 30 days |
recurring |
$19.95 |
| 90 days |
recurring |
$39.95 |
| 180 days |
non-recurring |
$69.95 |
|
|
|
