Match the metamorphic rock type with its description

Metamorphic rocks are formed by transforming preexisting rocks to form new ones. You need to be able to identify metamorphic rock types to know what type of rock your rock belongs to.

Foliated rock

Foliated rocks are formed from sedimentary rocks that have been folded and compressed. They can often be seen as slabs, sheets, and planes.

Foliated rocks are commonly found in mountainous regions, but they can also be found in coastal areas.

Hornfels

Hornfels is a fine-grained metamorphic rock that has a layered texture. It is made of quartz and feldspar, which are both minerals. Hornfels is also called hornblende schist or hornblende gneiss (a term used to describe any rock subjected to intense heat). Hornfels typically contains abundant silica (SiO2) inclusions within their matrix; this can be seen as large grains that appear white or gray on the surface but have darker internal coloration due to their high content of iron oxides as hematite (Fe2O3).

The combined effects of high temperature during metamorphism and prolonged heating may result in hornfels becoming highly fractured along foliation planes and showing other signs, such as dikes and intrusions through older sedimentary layers due to pressure exerted upon them by nearby magma chambers during eruption events.

Marble

Marble is a metamorphic rock composed of calcite, dolomite and sometimes quartz. It can be used as a building material because it’s very durable, but it can also be polished to a high sheen.

Quartzite

Quartzite is a metamorphic rock that occurs in sedimentary rocks. It is made up of quartz, a mineral found in granite and other igneous rocks. This means that quartzite can be used to identify these types of rocks because they all contain quartz as well as other minerals such as feldspars (feldspar), mica (mica), and hornblende (hornblende).

Quartzite has an interlocking pattern of cracks and folds on its surface called foliation. It was formed by layers moving horizontally across the surface during cooling from magma under pressure due to high temperatures deep underground.

Slate

Slate is a metamorphic rock with a fine-grained texture. It has a layered structure with alternating layers of shale and mudstone. Slate is formed when the pressure from overlying rocks causes clay or shale to change into slate.

Slate is typically gray to black but can also be greenish-gray or grayish-brown.[1] It can be formed by heat and pressure on clay minerals such as kaolinite or illite in an environment where temperatures are high enough to cause chemical reactions between elements within the clay minerals.[2][3] This type of reaction creates feldspar (KAlSi3O8), which forms crystals that form hexagonal patterns due to their regular spacing when viewed under magnification.[4]

Schist

Schist, also known as slate and phyllite, is a metamorphic rock with medium to large-grained crystals. The metamorphism of the slate forms it. Schists are foliated, meaning they have layers or “foliation” in them.

Schists can be found in many places worldwide; however, many of these areas are protected due to their unique geological features, such as karst that create cave systems and underground rivers that run through them.

Nonfoliated rock

Nonfoliated rocks are generally non-layered and are formed by heating and pressure. Examples include gneiss and schist.

So that you can identify metamorphic rocks!

The transformation of igneous and sedimentary materials forms metamorphic rocks. The most common metamorphic rock types include igneous, sedimentary and metasedimentary rocks.

The following are some examples:

• Igneous rocks are igneous (formed from magma) or volcanic in origin. They can be found at depth inside Earth’s crust or as independent formations on land surfaces. The basaltic volcanoes of Hawaii and Alaska serve as good examples of this type of rock type because they are made up primarily of minerals formed deep within the Earth’s mantle that have been reprocessed by pressure and heat during eruption events many millions of years ago; however, these same minerals may be found throughout much broader areas than just these two locations due to tectonic movement causing them to move towards other areas where similar conditions exist today.
• Sedimentary rocks form when sediments settle onto an existing surface such as dunes or beaches; they then become covered by more material which compacts together over time, forming solid layers called strata (meaning “layers”). These layers then split apart along faults if there is any weakness within them; however, if no fault exists, then all layers remain intact until erosion occurs later downstream, causing damage done through long periods without repair work being done on-site.”

Conclusion

We hope you’re as excited about this new resource as we are! And remember that if you need help identifying metamorphic rocks for yourself or your students, don’t hesitate to reach out to us. We’re always happy to help!

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