Based on ages of the oldest rocks in the North and South Atlantic, describe how and when the Atlantic Ocean formed, and how its shape has changed through time.
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Answer:
Micronesia
Explanation:
Micronesia generally considered to be a part of the Oceania continent. It is comprised of about thousands of islands that form the western part of the Pacific ocean. The name Micronesia was derived from the Greek word "mikros" and "nesos", where "mikros" means small and "nesos" means islands. In simple words, Micronesia means small islands. This Micronesia region experiences a tropical type of marine climatic condition. It comprises the same volcanic zone that is associated with the pacific ocean.
Thus, this group of small islands present in the Pacific ocean is known as Micronesia.
Tuff and volcanic breccia are both composed of a variety of igneous rock fragments. Their classification as either felsic, intermediate, or mafic therefore depends on the mineral content of each individual unit.
Tuff and volcanic breccia are classifies as types of rocks that are formed form ash residues of volcanic eruption and other small-sized particles.
These rock have a pyroclastic texture and their fragment size is less than 2.5 inches, hence, called tuff.
On the other hand, volcanic breccia have larger rock fragments having size more than 2.5 inches.
Their chemical composition shows that they are made up of mineral rich igneous rocks i.e. felsic or intermediate and also contain volcanic explosive materials.
Furthermore, tuff is also called volcanic tuff as it is formed from ash particles and volcanic material.
If you need to learn more about the igneous rocks click here:
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