Scoria

Marl

Scoria and Marl

Scoria

Marl

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Definition

Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities

Marl is an unconsolidated sedimentary rock consisting of clay and lime

History

Origin

Discoverer

Unknown

William Smith

Etymology

From late Middle English (denoting slag from molten metal), from Greek skōria refuse, from skōr dung

From Old French marle, from Late Latin marglia

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Vesicular

Earthy

Color

Black, Brown, Dark Grey to Black, Red

Beige, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy and Vesicular

Rough and Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Decorative Aggregates, Floor Tiles

Exterior Uses

Garden Decoration, Paving Stone

As Building Stone, Roof Tiles

Other Architectural Uses

Curbing

Industry

Construction Industry

Cement Manufacture, Construction Aggregate, for Road Aggregate, In landscaping and drainage works

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

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Jewellery, Sculpture, Small Figurines

Other Uses

Commercial Uses

As a traction material on snow-covered roads, Creating Artwork, High-temperature insulation, In gas barbecue grills

Creating Artwork, Soil Conditioner

Types

Basaltic Scoria and Andesitic Scoria

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

Features

Available in Lots of Colors and Patterns, Generally rough to touch, Surfaces are often shiny

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

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

Scoria forms when magma containing huge amount of dissolved gas flows from a volcano during an eruption.

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.

Composition

Mineral Content

Apatite, Biotite, Calcite, Feldspar, Hematite, Hornblade, Ilmenite, Magnetite, Olivine, Pyroxene, Quartz, Silica

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

Compound Content

Ca, NaCl

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5-62-3

1 7

👆🏻

Grain Size

Fine Grained

Very fine-grained

Fracture

Conchoidal

Streak

White

Porosity

Highly Porous

Luster

Subvitreous to Dull

Dull

Compressive Strength

70.00 N/mm²30.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

2.1

2.6

Specific Gravity

-99992.2-2.8

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³2.4-2.8 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.80 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Indonesia, Japan, Russia

India, Pakistan, Russia

Africa

Ethiopia, Kenya, Tanzania

Ethiopia, Kenya, Morocco, South Africa

Europe

Greece, Hungary, Iceland, Italy, Turkey

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

Others

Deposits in Western Continents

North America

Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA

USA

South America

Argentina, Chile, Ecuador, Peru

Colombia, Ecuador, Peru

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

New South Wales, Victoria, Western Australia

All about Scoria and Marl Properties

Know all about Scoria and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Scoria belongs to Igneous Rocks while Marl belongs to Sedimentary Rocks.Texture of Scoria is Vesicular whereas that of Marl is Earthy. Scoria appears Glassy and Vesicular and Marl appears Rough and Dull. The luster of Scoria is subvitreous to dull while that of Marl is dull. Scoria is available in black, brown, dark grey to black, red colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills and that of Marl are creating artwork, soil conditioner.