Definition
Oolite is a sedimentary rock formed from ooids, spherical grains which are composed of concentric layers of calcite
  
Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers
  
History
  
  
Discoverer
Unknown
  
Unknown
  
Etymology
From oo- + -lite, after German Oolit. A rock consisting of fine grains of carbonate of lime
  
From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone
  
Class
Sedimentary Rocks
  
Sedimentary Rocks
  
Sub-Class
Durable Rock, Medium Hardness Rock
  
Durable Rock, Soft Rock
  
Family
  
  
Group
Volcanic
  
Not Applicable
  
Other Categories
Fine Grained Rock, Opaque Rock
  
Fine Grained Rock, Opaque Rock
  
Texture
Clastic or Non-Clastic
  
Clastic or Non-Clastic
  
Color
Black, Blue, Brown, Cream, Green, Grey, Pink, Red, Silver, White, Yellow
  
Grey, White, Yellow
  
Maintenance
Less
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
No
  
No
  
Scratch Resistant
Yes
  
No
  
Stain Resistant
Yes
  
No
  
Wind Resistant
No
  
No
  
Acid Resistant
No
  
No
  
Appearance
Rounded and Rough
  
Soft
  
Architecture
  
  
Interior Uses
Decorative Aggregates, Flooring, Interior Decoration
  
Decorative Aggregates, Homes, Interior Decoration
  
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
  
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration
  
Other Architectural Uses
Not Yet Used
  
Powder
  
Industry
  
  
Construction Industry
Cement Manufacture, Cobblestones, Landscaping
  
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, raw material for manufacture of quicklime and slaked lime, Source of calcium
  
Medical Industry
Not Yet Used
  
Not Yet Used
  
Antiquity Uses
Artifacts
  
Artifacts, Monuments, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
Creating Artwork, Jewelry, Used in aquariums
  
Alumina Refineries, Creating Artwork, Drawing on blackboards, Gymnasts, athletes and mountain climbers use for grip, In aquifers, Paper Industry, Production of Lime, Raw material for manufacture of quicklime, slaked lime, Soil Conditioner, Whiting, Whiting material in toothpaste, paint and paper
  
Types
Not Available
  
Not Available
  
Features
Available in lots of colors, Generally rough to touch, Very fine grained rock
  
Clasts are smooth to touch, Is one of the oldest rock, Smooth to touch, Very fine grained rock
  
Archaeological Significance
  
  
Monuments
Not Yet Used
  
Used
  
Famous Monuments
Not Applicable
  
Data Not Available
  
Sculpture
Not Yet Used
  
Used
  
Famous Sculptures
Not Applicable
  
Data Not Available
  
Pictographs
Used
  
Used
  
Petroglyphs
Used
  
Used
  
Figurines
Not Yet Used
  
Used
  
Fossils
Present
  
Present
  
Formation
Oolites form when layers of calcite are deposited around a sand grain or fossil piece and are rolled around in calm water, which makes them round.
  
Chalk is formed from lime mud, which accumulates on the sea floor which is then transformed into rock by geological processes.
  
Composition
  
  
Mineral Content
Calcite, Chert, Clay, Dolomite, Quartz, Sand, Silt
  
Calcite, Clay, Clay Minerals, Quartz, Sand
  
Compound Content
Aluminium Oxide, Ca, NaCl, CaO, Iron(III) Oxide, FeO, MgO
  
Ca, NaCl, CaO
  
Transformation
  
  
Metamorphism
No
  
No
  
Types of Metamorphism
Not Applicable
  
Not Applicable
  
Weathering
Yes
  
Yes
  
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Biological Weathering, Chemical Weathering
  
Erosion
Yes
  
Yes
  
Types of Erosion
Chemical Erosion, Coastal Erosion
  
Chemical Erosion, Coastal Erosion, Water Erosion
  
Physical Properties
  
  
Hardness
3-4
  
1
  
Grain Size
Fine Grained
  
Very fine-grained
  
Fracture
Conchoidal
  
Not Available
  
Streak
White
  
White
  
Porosity
Less Porous
  
Highly Porous
  
Luster
Pearly to Shiny
  
Dull
  
Cleavage
Non-Existent
  
Non-Existent
  
Toughness
1
  
1
  
Specific Gravity
Not Available
  
2.3-2.4
  
Transparency
Opaque
  
Opaque
  
Density
Not Available
  
2.49-2.50 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
Not Available
  
0.90 kJ/Kg K
  
12
Resistance
Heat Resistant, Wear Resistant
  
Heat Resistant
  
Deposits in Eastern Continents
  
  
Asia
Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam
  
Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam
  
Africa
Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe
  
Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe
  
Europe
United Kingdom
  
England, France, Germany, Spain, United Kingdom
  
Others
Not Yet Found
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
USA
  
Canada, USA
  
South America
Colombia
  
Colombia
  
Deposits in Oceania Continent
  
  
Australia
Adelaide, New Zealand, Queensland, Tonga, Victoria, Yorke Peninsula
  
Adelaide, New Zealand, Queensland, Tonga, Victoria, Yorke Peninsula
  
Oolite vs Chalk Characteristics
Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Oolite vs Chalk characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Oolite and Properties of Chalk. Learn more about Oolite vs Chalk in the next section. The interior uses of Oolite include Decorative aggregates, Flooring and Interior decoration whereas the interior uses of Chalk include Decorative aggregates, Homes and Interior decoration. Due to some exceptional properties of Oolite and Chalk, they have various applications in construction industry. The uses of Oolite in construction industry include Cement manufacture, Cobblestones, Landscaping and that of Chalk include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate, Making natural cement, Raw material for manufacture of quicklime and slaked lime, Source of calcium.
More about Oolite and Chalk
Here you can know more about Oolite and Chalk. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Oolite and Chalk consists of mineral content and compound content. The mineral content of Oolite includes Calcite, Chert, Clay, Dolomite, Quartz, Sand, Silt and mineral content of Chalk includes Calcite, Clay, Clay Minerals, Quartz, Sand. You can also check out the list of all Sedimentary Rocks. When we have to compare Oolite vs Chalk, the texture, color and appearance plays an important role in determining the type of rock. Oolite is available in black, blue, brown, cream, green, grey, pink, red, silver, white, yellow colors whereas, Chalk is available in grey, white, yellow colors. Appearance of Oolite is Rounded and Rough and that of Chalk is Soft. Properties of rock is another aspect for Oolite vs Chalk. The hardness of Oolite is 3-4 and that of Chalk is 1. The types of Oolite are Not Available whereas types of Chalk are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Oolite and Chalk is white. The specific heat capacity of Oolite is Not Available and that of Chalk is 0.90 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Oolite is heat resistant, wear resistant whereas Chalk is heat resistant.