1. SIR C R REDDY (A) COLLEGE
DEPARTMENT OF GEOLOGY
SK.MEERJAVALI
III-B.Sc
( )

2. FOSSILS
The remains of ancient animals and plants preserved in the rocks
Latin word – fossilus – dugup
Fossils available in sedimentary rocks
Different fossils having different composition

3. Types of fossils Fossils of entire organism is preserved
Only skeleton is preserved
Carbonation as hard parts
Petrifaction as hard parts
Mould of skeleton
Imprints

4. Fossils of entire organism preserved along soft parts
It is a rare &cold conditions
The entire animal is preserved
Along with very little change is also preserved

5. Only skeleton is preserved
It is the condition of fossilisation in which the skeleton is completely preserved
Soft parts are destroyed and hard parts are preserved

6. Carbonation of hard parts
Marine life will change into carbon also some plants and small organisms like graptolites will change into carbon material

7. Petrifaction of hard parts
Hard parts of the ancient animals or plants are petrified
The petrified or mineralised parts bring into petrifaction

8. Mould of the skeleton
Fossilisation is along process and in some cases the skeleton is disappears
The shape of the original structure is preserved in the rocks