Marl

Blueschist

Marl and Blueschist

Marl

Blueschist

Add ⊕

Definition

Marl is an unconsolidated sedimentary rock consisting of clay and lime

Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature

History

Origin

USA

Discoverer

William Smith

Edgar Bailey

Etymology

From Old French marle, from Late Latin marglia

From French schiste, Greek skhistos i.e. split

Class

Sedimentary Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Earthy

Foliated

Color

Beige, Brown, Green, Grey, White

Blue, Bluish - Grey, Purple, Shades of Blue

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Dull

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Exterior Uses

As Building Stone, Roof Tiles

Garden Decoration, Office Buildings

Other Architectural Uses

Curbing

Industry

Construction Industry

Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Medical Industry

Antiquity Uses

Artifacts, Jewellery, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Creating Artwork, Soil Conditioner

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones

Types

Clay Marl ,Blue Marl, Red Marl, High Bank Marl, Shell Layer Marl, Under Shell Layer Marl, Sand Marl, Green Marl, Grey Marl and Clayey Marl

Metamorphic rock

Features

Generally rough to touch, Is one of the oldest rock, Splintery, Very fine grained rock

Has High structural resistance against erosion and climate, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Absent

Formation

Marl forms when very fine-grained clay particles are deposited in water which settles at the bottom of water bodies and are compacted by overlying sediment; the water squeezes out and hence forming Marl rock.

Blueschist forms due to the metamorphism of basalt and other rocks with similar composition at high pressures and low temperatures and approximately corresponding to a depth of 15 to 30 kilometers and 200 to 500 °C.

Composition

Mineral Content

Calcite, Clay, Dolomite, Gypsum, Micas, Pyrite, Quartz

Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz

Compound Content

Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, Silicon Dioxide

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

2-33.5-4

1 7

👆🏻

Grain Size

Very fine-grained

Fine to Medium Grained

Fracture

Conchoidal

Streak

White

White to Grey

Porosity

Highly Porous

Luster

Dull

Compressive Strength

30.00 N/mm²220.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Toughness

2.6

1.5

Specific Gravity

2.2-2.83-3.2

0 8.4

👆🏻

Transparency

Opaque

Density

2.4-2.8 g/cm³2.8-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.80 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant

Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Pakistan, Russia

Japan, Turkey

Africa

Ethiopia, Kenya, Morocco, South Africa

Egypt, Ethiopia, South Africa

Europe

Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland

France, Greece, Iceland

Others

Deposits in Western Continents

North America

USA

South America

Colombia, Ecuador, Peru

Deposits in Oceania Continent

Australia

New South Wales, Victoria, Western Australia

New Zealand

All about Marl and Blueschist Properties

Know all about Marl and Blueschist properties here. All properties of rocks are important as they define the type of rock and its application. Marl belongs to Sedimentary Rocks while Blueschist belongs to Metamorphic Rocks.Texture of Marl is Earthy whereas that of Blueschist is Foliated. Marl appears Rough and Dull and Blueschist appears Dull and Banded. The luster of Marl and Blueschist is dull. Marl is available in beige, brown, green, grey, white colors whereas Blueschist is available in blue, bluish - grey, purple, shades of blue colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.