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Slide No. 1

FOSSILS

Present is theKey to the Past

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Slide No. 2

Macrofossils

Microfossils

Mollusca

Radiolar snai

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Slide No. 3

from La BreahtolS

VertebrateFossils

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Slide No. 4

Trace Fossils

footprintscoprolites imprint

boringsburrows

s

dinosaur "dung"

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Slide No. 5

Preservation of organisms activity

Preservation of part of an organism

How most fossils become

1. hard part (carbonate, siliceous, bone)2. rapid burial (fine grained sediments)3. preservation factor (chemical

)lacsihypnda

1.2. burial and than

castndld amoreplacement

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Slide No. 6

Types of preservation

CarbonizationPermineralization

ReplacementR crystalizatione

FrozenMummification

Without alteration

With alteration

Original shell or bone

Dinosaur bone

Fish

erbmAniylF

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Slide No. 7

Data Derived from Fossils

Indirect EvidenceDirect Evidence

Tracks Dinosaur Nest

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Slide No. 8

organismClues about the

Sha kr teethsize

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Slide No. 9

What nfi ro mation?deiverdbeotnnac

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Slide No. 10

Mammal

Aves AmphibianPis

Reptile

esc

Where does the dinosaur belong?

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Slide No. 11

Reconstruction

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Slide No. 12

EATH CONDITIONSD

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Slide No. 13

Environmentalevidence

Capitola, Californialayersstorm verus living conditions

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Slide No. 14

Paleogeography

movement ofthe Earth' s Crustthrough time

Pangea

Significance ofPast Life

coal, oil,stratigraphyrelative time