What is a composite volcano?

2 answers:

7 0

It is a conical volcano built up by many layers of hardened lava, tephra, pumice and volcanic ash. It is also known as a Stratovolcano.

Ivahew [28]3 years ago

5 0

Its a conical volcano built up by many layers of hardened lava, tephra, pumice and ash

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Paleomagnetism is the study of the ____________________ magnetism in rocks. When magma cools, the magnetic iron-bearing minerals

NISA [10]

Answer:

Explanation:

Paleomagnetism is the study of the __record of earth's__ magnetism in rocks. When magma cools, the magnetic iron-bearing minerals align themselves with the Earth's magnetic field and record__the direction__ and ___intensity__.

Paleomagnetism is branch of geophysics which studies the record of earth's history of magnetism over its history.

Iron bearing minerals such as haematite that accompanies magma formation can be magnetized as they cool to form igneous rocks. This magnetization would record the current direction of the magnetic field and its intensity. When the magma finally cools and solidifies, the record is arrested and preserved in the rock.

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Question 9 (1 point) Igneous rocks can form under many different conditions, but they are always the result of cooling and cryst

Ugo [173]

Answer:

<u>A.True</u>.

Explanation:

Igneous is the Latin word for a rock that means fire, this is formed through the cooling and solidification of magma and lava the magma and lava form crystal on their process of cooling and hence<u> if the magma cools quickly the crystals made will be small and bigger crystal are formed when it cools slowly.</u>

It crystallizes as the natural gas comes in contact with the molten lava. These rocks also come in a variety of geological settings such as shields, platforms, orogens, basins, and extended forms of crust and oceanic crust.

Igneous rocks are thus called primary rocks and thus there are 700 known igneous rocks on earth and hence divided into two categories of rocks such us intrusive or plutonic rock being crystallized from magma beneath the surface of the earth and Extensive rocks like the volcanic rocks that are crystallised from the lava at the surface of the earth.

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Which term names the longest geologic time frame?

olasank [31]

Answer:

The longest time period is eons.