Gossan

Breccia

Gossan and Breccia

Gossan

Breccia

Add ⊕

Definition

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

Breccia is a rock consisting of angular fragments of stones which are cemented by finer calcareous material

History

Origin

Indonesia

England

Discoverer

Cornish Gossen

Unknown

Etymology

From Cornish gossen from gos, blood from Old Cornish guit

From Italian, literally gravel, Germanic origin and related to break

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Rough, Sandy

Brecciated, Clastic

Color

Brown, Brown- Black, Gold, Green, Rust

Beige, Black, Blue, Brown, Buff, Green, Grey, Orange, Pink, Purple, Red, Rust, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Layered, Banded, Veined and Shiny

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration

Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing

Industry

Construction Industry

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

As Dimension Stone, Construction Aggregate, Landscaping, Roadstone

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Gemstone

Creating Artwork, Gemstone, Jewelry

Types

Translocated gossan and Leakage gossan

Collapse Breccia, Fault Breccia, Flow Breccia, Pyroclastic Breccia, Igneous Breccia and Impact Breccia

Features

Clasts are smooth to touch, Easily splits into thin plates

Available in Lots of Colors and Patterns, Clasts are smooth to touch

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

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

Breccia is a clastic sedimentary rock which is composed of broken fragments of minerals or rock which are cemented together by a fine-grained matrix and it forms where broken, angular fragments of rock or mineral debris accumulate.

Composition

Mineral Content

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

Calcite, Clay, Feldspar, Phosphates, Quartz, Silica

Compound Content

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

Aluminium Oxide, Ca, NaCl, CaO, Iron(III) Oxide, Potassium Oxide, Sodium Oxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

4-57

1 7

👆🏻

Grain Size

Fine to Medium Grained

Medium to Coarse Grained

Fracture

Conchoidal

Uneven

Streak

White to Grey

White

Porosity

Highly Porous

Less Porous

Luster

Metallic

Dull to Pearly

Compressive Strength

-180.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

Specific Gravity

2.02.86-2.87

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³0 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.24 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

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

China, India, Kazakhstan, Mongolia, Russia, South Korea, Uzbekistan

Africa

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

Namibia, Nigeria, South Africa

Europe

Albania, France, Germany, Great Britain, United Kingdom

Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

Barbados, Canada, Mexico, Panama, USA

South America

Brazil, Colombia, Ecuador

Brazil

Deposits in Oceania Continent

Australia

New South Wales, South Australia, Western Australia

New South Wales, New Zealand

All about Gossan and Breccia Properties

Know all about Gossan and Breccia properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Breccia belongs to Sedimentary Rocks.Texture of Gossan is Rough, Sandy whereas that of Breccia is Brecciated, Clastic. Gossan appears Dull and Banded and Breccia appears Layered, Banded, Veined and Shiny. The luster of Gossan is metallic while that of Breccia is dull to pearly. Gossan is available in brown, brown- black, gold, green, rust colors whereas Breccia is available in beige, black, blue, brown, buff, green, grey, orange, pink, purple, red, rust, white, yellow colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Breccia are creating artwork, gemstone, jewelry.