ppt on mud stone and white mica

1. MUDSTONE & WHITE MICA
By
Shah Muzzafar
1881/17,CIVIL

2. • MUDSTONE • WHITE MICA
rock minera
l

3. contents
 Mud stone?
 Classification
 Properties
 Composition
 How formed?
 Occurrence
 Other features
 Uses

4. MUD STONE
 Mudstone is an
extremely fine
grained sedimentary
rock consisting of
mixture of clay and
silt size particles
 Terms such as
clay stone and silt
stone are often
used in place of
mud stone(BASED
ON GRAIN SIZE)

5. Shale Marl

6. Texture: clastic
Grain size: 0.06mm,clastic
Hardness: generally quiet soft ,but can
be hard and brittle
Colour: variable

7. Generally a mixture of clay
minerals with any or all of
Quartz, Feldspar, Mica, can
contain iron oxide(red or yellow)
,carbonaceous content(black)
and pyrite

8.  Mudstone form when very fine grained clay
particles are deposited in water
 They, tiny particles settle to the bottom of
ocean ,lake floors or lagoons or even in quiet
stretches of rivers
 As the mud is buried and compacted by
overlying sediments ,the water is squeezed
out and it turns into mud stone

9. • Throughout the world
,well exposed on many
coastlines ,for example
Auckland

10. organic matter preserved in 3 billion years old mud
stone at Gale Crater , MARSscience 08jan 2018
vol’360, issue0393,pp 1096-1107

15. CONTENTS
Muscovite
white mica
Composition
Properties
Occurrence
uses

16.  Muscovite ,also
known as white
mica[fine grained
variety ]
 Most common
mineral of the mica
family present in
igneous ,
metamorphic &
sedimentary rock
esp. granite

17. , Contain
silicate
minerals that
contain
potassium &
aluminum
 readily cleaves
into thin
transparent
sheets
 Not resistant
to chemical
weathering

18. Chemical
classification
Color
Cleavage
Mohs hardness
Sp. Gravity
Chemical
composition
Silicate
Colorless
 perfect
2.5-3
2.8-2.9
KAl2(Si3AlO10)9(
9OH)2

19. occurrence
 India is the most imp
mica producing
country , supplies abt
80% of world
requirements
 Three most important
occurrences are
1. Koderma mica belt in
Bihar
2. The Nellore mica belt
in Andhra Pradesh
3. Rajasthan mica belt
Bihar mica belt are
generally reddish in
color ,and are therefore
,known as ruby – mica

20. uses
 It is used in paints as a
pigment extender & helps
to brighten the tone of
colored pigments
 It is superior insulator so
in electrical industry it is
used as thermal insulation
,and in electronic
equipment as electrical
insulation
 Plain white mica powder adds a
youthful medium shine and helps to
reduce appearance of fine lines and
wrinkles
Usually used in foundation and
eye shadow blends