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The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
Plutonic rocks are the igneous rocks formed at considerable depths, generally between 7-10 km below the surface of the earth. Explanation: Because of a very slow rate of cooling at the depths, the rocks resulting from magma are coarse grained.
The rocks formed by gradual deposition, are called
Sedimentary rocks are formed through the gradual accumulation of sediments: for example, sand on a beach or mud on a river bed. As the sediments are buried they get compacted as more and more material is deposited on top.
Which of the following equipment/method is used for estimating soundness of a cement?
Soundness of cement:
The soundness of cement refers to the stability of the volume change in the process of setting and hardening. If the volume change is unstable after setting and hardening, the concrete structures will crack, which can affect the quality of buildings or even cause serious accidents, known as poor dimensional stability.
Le-Chatelier method and autoclave method are used to find the soundness of the cement.
Lime stones are generally known as
Limestone is a sedimentary rock composed principally of calcium carbonate (calcite) or the double carbonate of calcium and magnesium (dolomite). It is commonly composed of tiny fossils, shell fragments and other fossilized debris.
Geologically marble is known as
Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble is typically not foliated, although there are exceptions. In geology, the term "marble" refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone.
Chemically, marble is known as
Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble is typically not foliated, although there are exceptions. In geology, the term "marble" refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone.Chemically, marble is known as calcareous rock.
Kaolin is chemically classified as
Kaolin is a type of clay found in nature. It can also be made in a laboratory.
As main constituent is clay so it is argillaceous rock as argillaceous means made up of clay, and kaolin is a clay.
Quartzite is a
Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.
Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. Some cool so quickly that they form an amorphous glass. These rocks include andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff.
Sand stone is
Sandstone is a sedimentary rock composed of sand-size grains of mineral, rock, or organic material. It also contains a cementing material that binds the sand grains together and may contain a matrix of silt- or clay-size particles that occupy the spaces between the sand grains.
Limestone is not a
Limestone is not a metamorphic rock. Limestone is a sedimentary rock composed principally of calcium carbonate (calcite) or the double carbonate of calcium and magnesium (dolomite). It is commonly composed of tiny fossils, shell fragments and other fossilized debris.
Pegmatite is a/an
Pegmatite is an intrusive igneous rock with extremely large crystals sometimes greater than 10cm. Pegmatites are usually composed of feldspars, quartz and micas but may also contain minerals such as tourmaline (a silicate mineral that contains boron).
Laterite is a/an
Laterite is a soil and rock type rich in iron and aluminium, and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by intensive and prolonged weathering of the underlying parent rock and hence called Arigillaceous rock as it contains clay sized particles.
Granite mainly composed of quartz and felsper particles, is obtained, from
Gneiss is obtained from
Gneiss is a high grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock. Gneiss displays distinct foliation, representing alternating layers composed of different minerals.
Gneiss usually forms by regional metamorphism at convergent plate boundaries. It is a high-grade metamorphic rock in which mineral grains recrystallized under intense heat and pressure. This alteration increased the size of the mineral grains and segregated them into bands, a transformation which made the rock and its minerals more stable in their metamorphic environment.
Dolomite is a lime stone which contains carbonate of magnesia upto
Limestone: It is a sedimentary rock composed primarily of calcite, a calcium carbonate mineral with a chemical composition of CaCO3.
Dolomite: It is a mineral composed of calcium and magnesium carbonate combined in equal molecular property, expressed by the formula CaMg(CO3)2.
Dolomite contains a 45% carbonate of magnesia.
The colour of statuary marble used for sculptor’s work is
White Statuary Marble is the most precious and sought-after marble in the World and it has always been prefered by the artists and especially sculptors for their masterpieces.
Black marble is generally found in the district of
Generally, white marble is found in Jabalpur district (M.P) & Black marble in Jaipur.
The rocks having alumina or clay as their major constituents, are known as
According to the chemical classification of rocks, they are classified as follows
1) Siliceous rocks:
The rocks which contain silica as the main constituent is called as siliceous rocks
Ex: Granite, Gneiss, Trap, Basalt, Sandstone, and Quartzite.
2) Argillaceous rocks:
The rocks which contain clay or alumina as a main constituent is called as argillaceous rocks.
Ex: Slate, Laterite, and Kaolin
3) Calcareous rocks:
The rocks which contain lime or calcium as the main constituent are called calcareous rocks.
Ex: Marble, Limestone, and Dolomite
According to geological classification, rocks are classified as
1) Igneous rocks:
Ex: Granite, Basalt, Trap, and Dolerite
2) Sedimentary rocks:
Ex: Sandstone, Shale, Slate, Limestone, and Laterite
3) Metamorphic rocks:
Ex: Marble, Quartzite, Slate, and Schist
Which of the following is a sedimentary rock?
The earth's crust is made up of various types of rocks, differing from one another in texture, structure, colour, permeability, mode of occurrence, and degree of resistance to denudation.
Generally speaking, all rocks may be classified into three major groups:
1. Igneous Rocks:
2. Sedimentary Rocks:
3. Metamorphic Rocks:
The softest rock is
The softest crystal is the mineral talc, which has a hardness of one (1) on the Mohs Hardness Scale. Talc is a silicate (like many of the earth's most important minerals), and contains magnesium and a bit of water along with the silica and oxygen.
The specific gravity of marble, is
Correct Answer :- d
Explanation : Limestone(CaCO3) being the main compound it is liable to acid attacks, if MgCO3 is the major constituent then it is more acid resistant. Its specific gravity is 2.72.
Correct Answer :- a
Explanation : The shingle is water bound pebble.
In civil engineering, Shingle is a thin piece of building material, usually with a butt end thicker than the other. Shingles are widely used as roof covering on residential buildings and sometimes for siding. They are of stock sizes and various materials—including wood, asphalt, and slate. They are attached in overlapping courses, or rows.
The rock generally used for roofing, is
Slate can be made into roofing slates, which are installed by a Slater. And, are a type of roof shingle, or more specifically a type of roof tile. Slate has two lines of break ability "Cleavage and grain" which make it possible to split the stone into thin sheets. When broken, slate retains a natural appearance while remaining relatively flat and easy to stack.
Laterite is found in
In India, laterite soil is widespread, covering over 10% of the total geographical area, namely on the summits of the Western Ghats, Eastern Ghats (Rajamahal Hills, Vindhyas, Satpuras, and Malwa Plateau), southern parts of Maharashtra, parts of Karnataka, Andhra Pradesh, West Bengal Orissa, Jharkhand, Kerala, Assam, and Meghalaya.