Shoshonite

Gossan

Shoshonite and Gossan

Shoshonite

Gossan

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Definition

Shoshonite is a basaltic rock, properly a potassic trachyandesite, composed of olivine, augite and plagioclase phenocrysts in a groundmass with calcic plagioclase and sanidine and some dark-colored volcanic glass

Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.

History

Origin

Wyoming,USA

Indonesia

Discoverer

Iddings

Cornish Gossen

Etymology

From the place of origin called Shoshone riverin Wyoming

From Cornish gossen from gos, blood from Old Cornish guit

Class

Igneous Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Porphyritic

Rough, Sandy

Color

Brown- Black, Dark Brown

Brown, Brown- Black, Gold, Green, Rust

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Countertops, Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone

As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Sculpture

Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork

Cemetery Markers, Commemorative Tablets, Gemstone

Types

Intermediate volcanic rock

Translocated gossan and Leakage gossan

Features

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

Clasts are smooth to touch, Easily splits into thin plates

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Shoshonite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.

Composition

Mineral Content

Pyroxene

Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon

Compound Content

Aluminium Oxide, Iron(III) Oxide, Potassium Oxide, Sodium Oxide, Titanium Dioxide

Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Properties

Physical Properties

Hardness

64-5

1 7

👆🏻

Grain Size

Medium to Fine Coarse Grained

Fine to Medium Grained

Fracture

Uneven

Conchoidal

Streak

White to Grey

Porosity

Less Porous

Highly Porous

Luster

Dull

Metallic

Compressive Strength

175.00 N/mm²-

0.15 450

👆🏻

Cleavage

Toughness

1.6

Specific Gravity

2.982.0

0 8.4

👆🏻

Transparency

Opaque

Density

2.9-3 g/cm³-9999 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.24 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

China, India, Indonesia, Russia, Singapore, South Korea

Africa

South Africa

Cape Verde, Ethiopia, Ghana, South Africa, Western Africa

Europe

Iceland

Albania, France, Germany, Great Britain, United Kingdom

Others

Deposits in Western Continents

North America

Canada, USA

South America

Brazil

Brazil, Colombia, Ecuador

Deposits in Oceania Continent

Australia

New South Wales, South Australia, Western Australia

All about Shoshonite and Gossan Properties

Know all about Shoshonite and Gossan properties here. All properties of rocks are important as they define the type of rock and its application. Shoshonite belongs to Igneous Rocks while Gossan belongs to Metamorphic Rocks.Texture of Shoshonite is Porphyritic whereas that of Gossan is Rough, Sandy. Shoshonite appears Dull and Gossan appears Dull and Banded. The luster of Shoshonite is dull while that of Gossan is metallic. Shoshonite is available in brown- black, dark brown colors whereas Gossan is available in brown, brown- black, gold, green, rust colors. The commercial uses of Shoshonite are cemetery markers, creating artwork and that of Gossan are cemetery markers, commemorative tablets, gemstone.