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The thin flat layering found in most metamorphic rocks is called foliation

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Gerardo Glover

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What describes the thin flat layering found in most metamorphic rocks?

The thin flat layering found in most metamorphic rocks is called foliation, and it is formed due to the alignment of mineral grains or the presence of alternating layers of different mineral compositions. Foliation is a common feature in rocks that have undergone high pressure and temperature conditions, leading to the development of a layered structure.


What term describes an erosional surface bounded above by flat-lying sedimentary rocks and below by igneous or metamorphic rocks?

nonconformity


What are planar rocks?

Planar rocks are rocks that have layering or bedding planes, which are flat surfaces where the rock has split or been deposited in distinct layers. These layers can be caused by sedimentation, metamorphism, or other geological processes. Planar rocks are commonly found in sedimentary and metamorphic rocks.


How do flat rocks form?

Mos flat rocks are sedimentary, with shale being a prime example. Shale forms from fine sediment being laid down in layers and then later hardened into rock, with the layers preserved. Slate is a metamorphic rock derived from shale that still preserves the layering.


How do flat form?

Mos flat rocks are sedimentary, with shale being a prime example. Shale forms from fine sediment being laid down in layers and then later hardened into rock, with the layers preserved. Slate is a metamorphic rock derived from shale that still preserves the layering.


What term is used to describe metamorphic rocks with a banded texture?

The two main groups of metamorphic rocks are foliated and non-foliated. Foliated metamorphic rocks show layering and parallel alignment of flat mineral crystals (ex. micas). The "banded texture in metamorphic rocks" is one of the specific kinds of foliated textures. It is referred to as gneissic banding. Essentially, this texture displays alternating layers of light and dark minerals. These rocks are called gneiss- the light bands form from quartz and feldspars, while the dark ones form from ferromagnesian minerals.


What are rocks that have grains that lie in a pattern of flat layers or form swirls?

Rocks with grains that lie in flat layers are sedimentary rocks, which include sandstone and shale. Rocks with swirling patterns are often metamorphic rocks, such as gneiss or marble, which have undergone intense heat and pressure causing their minerals to align in distinct patterns.


What condition produces the distinct layers of flat and elongated minerals in the foliated metamorphic rocks?

The condition that produces distinct layers of flat and elongated minerals in foliated metamorphic rocks is directed pressure, which causes the minerals to align perpendicular to the direction of pressure. This pressure helps give the rock its characteristic layered structure, known as foliation.


What kind of rock breaks apart into flat planar sections?

The type of rock that breaks apart into flat planar sections is called a sedimentary rock, specifically those that exhibit layering, such as shale. Shale is composed of fine particles and clay minerals that align in such a way that it can split easily along these layers. This characteristic is due to the processes of sedimentation and compaction, which create distinct planes of weakness in the rock. Other types of rocks, like schist or gneiss, also exhibit foliation and can break in flat sections but are metamorphic in nature.


What is a nonfoliated texture?

A non-foliated rock is a metamorphic rock that does not display a lamellar texture or distinct light and dark banding common to foliated metamorphic rocks. Non-foliated rock includes quartzite, marble, and metabasalt. Non-foliated metamorphic rocks are most often derived from single mineral sedimentary rocks like limestone and quartz sandstone. == == == ==


Where in the Bronx can one find igneous sedimentary and metamorphic rocks?

If you can find an open piece of dirt, you can find rocks. All rocks fallinto those three categories. If you find a flat, smooth piece of rock, you might have found slate, a metamorphic rock. However, most metamorphic rocks are hard to find in the New York area, as there are few plate tectonics in these parts. Anyhow, look for rocks and use this rock key: http://www.rockhounds.com/rockshop/rockkey/index.html


What is a mineral with smooth flat sheets?

Mica is a mineral that often forms smooth flat sheets. It is known for its perfect cleavage and ability to be easily split into thin, flexible layers. Mica is commonly found in igneous and metamorphic rocks.