Slate (metamorphic) if put under more pressure could change into a schist. A basalt (igneous) could also become a schist. Limestone (sedimentary) can become marble.

Because these layers are buried, temperatures and pressures become greater and greater until the shale is changed into slate. Slate is a fine-grained metamorphic rock with perfect cleavage that allows it to split into thin sheets.

In general, metamorphic rocks do not undergo significant changes in chemical composition during metamorphism. The changes in mineral assemblages are due to changes in the temperature and pressure conditions of metamorphism.

Regional metamorphism

8.2 List four agents that drive metamorphism. Heat, pressure, directional stress, and fluids which are chemically active.

heat and pressure. HEAT: There are two sources of heat, one comes from the geothermal gradient – the increase in temperature that occurs with increase in depth in the earth.

There are two main types of metamorphic rocks: those that are foliated because they have formed in an environment with either directed pressure or shear stress, and those that are not foliated because they have formed in an environment without directed pressure or relatively near the surface with very little pressure …

Three types of metamorphism exist: contact, dynamic, and regional. Metamorphism produced with increasing pressure and temperature conditions is known as prograde metamorphism.

Answer: Serpentine minerals are made of tiny sheets of silica tetrahedrons that are loosely held together.

talc

Chalk, soft, fine-grained, easily pulverized, white-to-grayish variety of limestone. Chalk is composed of the shells of such minute marine organisms as foraminifera, coccoliths, and rhabdoliths. The purest varieties contain up to 99 percent calcium carbonate in the form of the mineral calcite.

The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and the differences among them have to do with how they are formed. Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material. Together, all these particles are called sediment.

Differences. Metamorphic Rock – Forms when pressure, temperature, or chemical processes change existing rock. Igneous Rock – forms when magma or lava cools and hardens to become solid. Sedimentary Rock – Form when minerals that form from solutions or sediment from older rocks get pressed and cemented together.

Most minerals can be characterized and classified by their unique physical properties: hardness, luster, color, streak, specific gravity, cleavage, fracture, and tenacity.

Rocks are classified according to characteristics such as mineral and chemical composition, permeability, texture of the constituent particles, and particle size. These physical properties are the result of the processes that formed the rocks.

Key Concepts Properties that help geologists identify a mineral in a rock are: color, hardness, luster, crystal forms, density, and cleavage.

Metamorphic rocks were once igneous or sedimentary rocks, but have been changed (metamorphosed) as a result of intense heat and/or pressure within the Earth’s crust. They are crystalline and often have a “squashed” (foliated or banded) texture.

The word metamorphic literally means “changed form”. Slate, a metamorphic rock, can form from shale, clay or mudstone. The Taj Mahal in India is made entirely of different types of marble, a metamorphic rock. Serpentine is a type of metamorphic rock that originates as the igneous rock periodite.

Metamorphic rocks form beneath the surface of the earth. But if the lava cools slowly, the rocks will have plenty of texture, gas bubbles, tiny holes and spaces. This type of rock is made out of sand, shells, pebbles and other materials. Together, these particles are “sediment”.

What Are the Most Important Types of Rock in the Crust?

• Granite is great stuff! Not only is it my personal favorite, it is without a doubt the most common rock type on the continental land masses.
• Basalt is extrusive.
• As it turns out, most of the ocean floor is basalt, and most of the continents are granite.

Sedimentary rocks

Igneous rocks make up over 90% of Earth’s crust by volume. This is not noticeable because they are mostly covered by sedimentary and metamorphic rocks.

Inner core

oxygen

Crust. Tarbuck, Earth’s crust is made up of several elements: oxygen, 46.6 percent by weight; silicon, 27.7 percent; aluminum, 8.1 percent; iron, 5 percent; calcium, 3.6 percent; sodium, 2.8 percent, potassium, 2.6 percent, and magnesium, 2.1 percent.

5 to 70 km

The Earth is divided into three main layers. The dense, hot inner core (yellow), the molten outer core (orange), the mantle (red), and the thin crust (brown), which supports all life in the known universe. Earth’s interior is generally divided into three major layers: the crust, the mantle, and the core.