Basanite

Blueschist

Basanite and Blueschist

Basanite

Blueschist

Add ⊕

Definition

Basanite is a black basaltic rock which mainly contains plagioclase, augite, olivine and nepheline and is formerly used as a touchstone

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

Unknown

Edgar Bailey

Etymology

From Latin basanites + -ite

From French schiste, Greek skhistos i.e. split

Class

Igneous Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Foliated

Color

Black, Brown, Green, Grey, Red, White

Blue, Bluish - Grey, Purple, Shades of Blue

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy or Pearly

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Exterior Uses

As Building Stone, Garden Decoration, Office Buildings

Garden Decoration, Office Buildings

Other Architectural Uses

Whetstones

Industry

Construction Industry

Arrowheads, Construction Aggregate, Cutting Tool, Spear Points

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Medical Industry

Antiquity Uses

Artifacts, Monuments

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

As a touchstone, Creating Artwork, Gemstone, In fire-starting tools, Manufacture of tools, Metallurgical Flux, Jewelry, To ignite fire, Used in flintlock firearms

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

Types

Nepheline-Basanite, Analcite-Basanite and Leucite-Basanite

Metamorphic rock

Features

Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate, Used as a touchstone

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

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Basanite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes.

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

Augite, Feldspar, Ilmenite, Olivine, Plagioclase

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

Compound Content

Potassium Oxide, Sodium 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

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Chemical Weathering, Mechanical Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

73.5-4

1 7

👆🏻

Grain Size

Fine Grained

Fine to Medium Grained

Fracture

Uneven, Splintery or Conchoidal

Conchoidal

Streak

White

White to Grey

Porosity

Highly Porous

Luster

Waxy and Dull

Dull

Compressive Strength

100.00 N/mm²220.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Toughness

1.5

Specific Gravity

2.5-2.83-3.2

0 8.4

👆🏻

Transparency

Translucent to Opaque

Opaque

Density

2.7 g/cm³2.8-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.74 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan, Turkey

Africa

Uganda

Egypt, Ethiopia, South Africa

Europe

Germany, Hungary, Italy, Spain

France, Greece, Iceland

Others

Greenland, Mid-Atlantic Ridge

Deposits in Western Continents

North America

USA

South America

Bolivia, Brazil

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Queensland, South Australia, Western Australia

New Zealand

All about Basanite and Blueschist Properties

Know all about Basanite and Blueschist properties here. All properties of rocks are important as they define the type of rock and its application. Basanite belongs to Igneous Rocks while Blueschist belongs to Metamorphic Rocks.Texture of Basanite is Aphanitic to Porphyritic whereas that of Blueschist is Foliated. Basanite appears Glassy or Pearly and Blueschist appears Dull and Banded. The luster of Basanite is waxy and dull while that of Blueschist is dull. Basanite is available in black, brown, green, grey, red, white colors whereas Blueschist is available in blue, bluish - grey, purple, shades of blue colors. The commercial uses of Basanite are as a touchstone, creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms and that of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.