Sedimentary rocks are an important rock type because they provide information re

Question

Sedimentary rocks are an important rock type because they provide information regarding the history of our planet. choose a specific sedimentary rock that you found interisting and You will need to discuss, IN DETAIL, the following:

1) Type of sedimentary rock you chose (clastic, biochemical, chemical, organic)

2) The name of the sedimentary rock you chose (eg. sandstone, limestone etc.)

3) The various characteristics of the type rock you chose (i.e. How geologists go about determining that the rock is what it is?).

4) How it forms (depositional environment) - be sure to provide a lot of detail here.

5) Any other interesting information you learned about the type of sedimentary rock you chose during your research. 

Explanation / Answer

1) Type : Chemical sedimentary rock.

2) Name: Iron ore

3) One of the most important identifying characteristics is that it is strongly magnetic.

4) Iron is too reactive to exist alone so it occurs naturally in the earth crust as Iron ore and it is formed from the combination of iron and oxygen in marine and fresh water, mostly it occurs in the form of hematite ,magnetite and siderite.

5) Iron is the most common element in the universe, it can be found in meteorites and comets , It is the most abundant element in the earth crust by weight and it is found both in inner and outer core. Though earth is abundant in iron but Mars has proportionally more iron than earth.

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