types of metamorphic rocks in kenya

List of Top 16 Metamorphic Rocks

The dominant types of metamorphic rocks derived from igneous and sedimentary rocks are listed in the tables below. This is a massive, hard compact to fine grained metamorphic rock developed in contact with large igneous intrusions (by contact metamorphism). Under the microscope a characteristic mosaic texture can be recognized. Get price

How Gemstones are Formed: Learn about the processing of

Jul 22, 2008The result is the creation of metamorphic rock. Gemstones associated with metamorphic rock include beryl, jade, lapis lazuli, turquoise, spinel, ruby, sapphire and zircon. Rocks and minerals are in a constant state of change, which is referred to as the rock cycle. Igneous rock can change into sedimentary or metamorphic rock. Get price

The rock cycle

The aim of the cycle is to describe the relationship between the three basic rock types: igneous, sedimentary, and metamorphic. There are many versions of the rock-cycle concept around these days. Many cycles exist in the natural world, such as the water cycle, the life cycles of insects, of other animals, and the nitrogen cycle. Get price

Metamorphic rock

Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means change in form. The original rock is subjected to heat (temperatures greater than 150 to 200 C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change.The protolith may be a sedimentary, igneous, or existing metamorphic rock. Get price

GEOLOGY AND STRUCTURE OF THE PRECAMBRIAN ROCKS IN

metamorphic Structural framework of Africa consist of Precambrian rocks that have been subjected to major supracrustal plutonic events, such as; Liberian (3,000 200my) Eburnean (1,850 250my) Kibarian (1,150 100my) Pan African (600my) The Crystalline rocks which forms the basement complex rocks of Nigeria are exposed in about half the Get price

Rock Types Subtypes

Metamorphic Rock •There are two types of metamorphic rock: –Foliated –Nonfoliated . Free Powerpoint Templates Page 20 Foliated metamorphic rock •Foliated rocks have aligned mineral crystals. The minerals are aligned in planes or bands. •Sometimes they appear striped Get price

Metamorphism: Kinds, Effects and Grades

ADVERTISEMENTS: In this article we will discuss about:- 1. Meaning of Metamorphism 2. Factors of Metamorphism 3. Kinds of Metamorphism 4. Metasomatism 5. Effects of Metamorphism 6. Metamorphic Grades, Zones and Facies. Meaning of Metamorphism: Any pre-existing type of rock forming a part of the crust may or may not undergo any physical, chemical or [] Get price

The Rock Gallery has Igneous Metamorphic Sedimentary Rock

The Rock Gallery contains pictures and descriptions of common igneous, metamorphic, and sedimentary rocks.The igneous rocks, like the granite that makes up half Dome, in Yosemite National Park, pictured above, are listed at the top of the page followed by metamorphic rocks. Get price

What Are the 3 Types of Rocks?

Jun 22, 2020Metamorphic Rocks. The process of formation of metamorphic rocks starts with existing rocks. Then, they undergo some sort of change due to immense heat or pressure. For example, a rock made of sand is "metamorphosed" into another type of rock when it Get price

7.2 Classification of Metamorphic Rocks

The various types of foliated metamorphic rocks, listed in order of the grade or intensity of metamorphism and the type of foliation are: slate, phyllite, schist, and gneiss (Figure 7.2.4). As already noted, slate is formed from the low-grade metamorphism of shale, and has microscopic clay and mica crystals that have grown perpendicular to the Get price

Chapter 22: Classification of Metamorphic Rocks

Schist: a metamorphic rock exhibiting a schistosity. By this definition schist is a broad term, and slates and phyllites are also types of schists. In common usage, schists are restricted to those metamorphic rocks in which the foliated minerals are coarse enough to see easily in hand specimen. Foliated Metamorphic Rocks. 24 Get price

Classification of Metamorphic Rocks

Classification of metamorphic rocks is based on mineral assemblage, texture, protolith, and bulk chemical composition of the rock. Each of these will be discussed in turn, then we will summarize how metamorphic rocks are classified. Texture In metamorphic rocks individual minerals may or may not be bounded by crystal faces. Get price

Geological Society

The Rock Cycle (KS3) | Types of Rock | Metamorphic Rocks | Gneiss Uses. Gneiss Uses Flooring. Facing Stones . Ornamental Stone. Metamorphic Gneiss has many uses as a building material such as flooring, ornamental stones, gravestones, facing stones on buildings and work surfaces. Gravestones. Get price

Mt. Kenya, Kenya

Several types of volcanic rocks make up the mountain. The most common rocks are basalts. The Mount Kenya Suite consists of all the rocks erupted from Mt. Kenya and volcanoes that were built by it. It covers 2700 square miles in a 65 mile (105 km) diameter circle around the volcano. Volcanic activity at Mt. Kenya was concentrated in Pleistocene Get price

Types Of Rocks Metamorphic

They are known to almost look like granite rocks. If you are able to see layers that are crumpled in metamorphic rocks, then you can be sure that they are gneiss metamorphic rocks. Marbles are types of rocks metamorphic too. They are limestones that have gone through metamorphosis. Get price

Metamorphic Rocks: Formation, Types and Examples

Jun 10, 2016Slate is a low-grade and fine-grained metamorphic rock that can be separated into thin pieces. It is a type of foliated metamorphic rock that is produced by the metamorphism of shale. Slates are predominantly realigned clay minerals. 10. Schist. Schist is a foliated metamorphic rock that is well developed and contains substantial amounts of mica. Get price

Metamorphic Rocks and the Rock Cycle

Metamorphic rocks form when sedimentary or igneous rocks change after being exposed to extreme heat or pressure without melting. As conditions on Earth change, rocks may change from one type to another. Sedimentary rocks can change into metamorphic rocks, or, if they melt, into igneous rocks. Get price

Rocks Lesson Plan

Activity Instructions: Organize a number of different rock examples as well as a booklet or worksheet for students to complete. Let the students investigate each rock sample, writing the characteristics they noticed and ultimately sorting the rocks into what they think is the correct type, igneous, metamorphic Get price

tary, and metamorphic rocks using the rock cycle. Map URL

Examine patterns of where rock types form and the relationship they have toward each other. NGSS:MS-ESS2-3 – Analyze and interpret data on the distribution of fossils, rocks, continental shapes, seafloor structures to provide evidence of past plate motions. Get price

Interactives . The The Rock Cycle . Types of Rocks

Types of Rocks Rocks are not all the same! 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 Sedimentary rocks are formed from particles Get price

Rock cycle

The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous.Each rock type is altered when it is forced out of its equilibrium conditions. For example, an igneous rock such as basalt may break down and dissolve when exposed to the atmosphere, or melt as it is subducted under a continent. Get price

Grand Canyon Geology

Metamorphic rocks are formed when sedimentary or igneous rocks change due to exposure to heat and/or pressure. All three rock types can be found in the Grand Canyon, and each layer adds an important understanding to the geologic history of the region. Metamorphic Basement Rocks. Get price