What are fossils ?

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What are fossils ? Direct or indirect remains of organisms persevered in media such as sedimentary rock , amber , ice , or tar

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What are fossils ?. Direct or indirect remains of organisms persevered in media such as sedimentary rock , amber , ice , or tar. Different kinds of fossils …. Whole Organisms . Replacement. Permineralization. Different kinds of fossils …. Imprint. Trace. Mold & Cast . - PowerPoint PPT Presentation

Transcript of What are fossils ?

Page 1: What are fossils ?

What are fossils?

Direct or indirect remains of organisms persevered in media such as sedimentary rock, amber, ice, or tar

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Different kinds of fossils…

Whole Organisms

Permineralization

Replacement

http://upload.wikimedia.org/wikipedia/commons/2/23/Asaphus_species_trilobite.jpg
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Different kinds of fossils…

Mold & Cast

ImprintTrace

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How do Fossils support Evolution? Transitional Fossils

Despite the rarity of fossilization, we have a wealth of transitional fossil data that conforms to phylogenetic trees of various species.

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The Law of Superposition

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The Law of SuperpositionThe higher up you go in an undisturbed rock stratum, the younger the rock layers become.

Relative Dating:Fossils can be dated this way in relation to the age of the rock surrounding them!

Newer Sediment

Older Sediment

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Radioactive Dating: Geologists use uranium to estimate the age of the earth at 4.6 billion years.

How old is the Earth???

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C14 is a radioactive isotope of carbon that is produced in the upper atmosphere.

Plants get their carbon from the atmosphere, this is passed on to animals through the food chain.

The ratio of carbon-12 to carbon-14 at the moment of death is the same as every other living thing, but the carbon-14 decays and is not replaced.

The carbon-14 decays with its half-life of 5,700 years, while the amount of carbon-12 remains constant in the sample.

By looking at the ratio of carbon-12 to carbon-14 in the sample and comparing it to the ratio in a living organism, it is possible to determine the age of a formerly living thing fairly precisely.

Radio Carbon Dating:

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How old is the Earth???

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How old is the Earth???

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Absolute Dating: 1. Relies on events in the geological

record with very strong annual cyclicity2. Measuring decay of radiogenic

isotopes (ie. Potassium 40- Aragon 40)

How old is the Earth???


Fossils. What are Fossils? Fossils are the remains of plants or animals that lived a long time ago, or any evidence of their existence.

Fossils. What are Fossils? Fossils are the remains of plants or animals that lived a long time ago, or any evidence of their existence.

FOSSILS. FORMATION OF FOSSILS Fossils are preserved remains or traces of living things. Fossils are preserved remains or traces of living things.

FOSSILS. FORMATION OF FOSSILS Fossils are preserved remains or traces of living things. Fossils are preserved remains or traces of living things.

Plant Fossils Animal Fossils What are fossils? Fossils are the remains (or traces) of dead plants or animals from long ago that have been preserved.

Plant Fossils Animal Fossils What are fossils? Fossils are the remains (or traces) of dead plants or animals from long ago that have been preserved.

Fossils Fossils provide biased view of biota Fossils provide biased view of biota Not all organisms are preserved Not all organisms are preserved Rare.

Fossils Fossils provide biased view of biota Fossils provide biased view of biota Not all organisms are preserved Not all organisms are preserved Rare.

We’re Diggin’ Up Bones!. Fossils are what is left of living things from the past. Fossils can be prints of animals or plants. Some fossils are parts of.

We’re Diggin’ Up Bones!. Fossils are what is left of living things from the past. Fossils can be prints of animals or plants. Some fossils are parts of.

What are fossils? are fossils dukes.pdfKey Vocabulary Relative Dating ... Frozen Fossils Paleontologists rarely find such perfect specimens from the past as this baby mammoth, discovered

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Fossils - anderson1.org · study fossils—have found ancient feathers, fur, and even skin. These fossils are very special. They can tell us what an ancient animal looked like. This

Fossils - anderson1.org · study fossils—have found ancient feathers, fur, and even skin. These fossils are very special. They can tell us what an ancient animal looked like. This

What Are Fossils? Unearthing Fossils Saving Our History Brochure 2015 FS 1058 .pdffossils. Paleontology is the scientific study of fossils. Fossils may be shells, bones, or plant leaves,

What Are Fossils? Unearthing Fossils Saving Our History Brochure 2015 FS 1058 .pdffossils. Paleontology is the scientific study of fossils. Fossils may be shells, bones, or plant leaves,

What Are Fossils? Unearthing Fossils Saving Our History · Fossils are the remains or traces of once living plants or animals that typically were buried in layers of sediment. Over

What Are Fossils? Unearthing Fossils Saving Our History · Fossils are the remains or traces of once living plants or animals that typically were buried in layers of sediment. Over

How Fossils Are Formed

How Fossils Are Formed

Index Fossils. What are Fossils? Preserved remains or traces of living things. They help show how the Earth has changed over time. They are clues to what.

Index Fossils. What are Fossils? Preserved remains or traces of living things. They help show how the Earth has changed over time. They are clues to what.

Fossils: Evidence of Past Life. Fossils Fossils are the remains or traces of prehistoric life.

Fossils: Evidence of Past Life. Fossils Fossils are the remains or traces of prehistoric life.

Fossils and Geologic Time. What fossils are NOT… My doctor says I’m in the early stages of fossilization!

Fossils and Geologic Time. What fossils are NOT… My doctor says I’m in the early stages of fossilization!

FOSSILS Traces of the past……. What happened before Fossils are traces of things that happened long ago Plants and animals can become fossils We.

FOSSILS Traces of the past……. What happened before Fossils are traces of things that happened long ago Plants and animals can become fossils We.

Unit 10 Lesson 1 What Are Fossils? - WordPress.com · 10/03/2018  · Unit 10 Lesson 1 What Are Fossils? Copyright © Houghton Mifflin Harcourt Publishing Company. Title: PowerPoint

Unit 10 Lesson 1 What Are Fossils? - WordPress.com · 10/03/2018  · Unit 10 Lesson 1 What Are Fossils? Copyright © Houghton Mifflin Harcourt Publishing Company. Title: PowerPoint

Fossils D. Crowley, 2008. Fossils To know how fossils are formed and how they provide evidence for evolution.

Fossils D. Crowley, 2008. Fossils To know how fossils are formed and how they provide evidence for evolution.

Quick-write What is a fossil?. Fossils Fossils are remains, or evidence, of living organisms that have been preserved over millions of years.

Quick-write What is a fossil?. Fossils Fossils are remains, or evidence, of living organisms that have been preserved over millions of years.

What Are Fossils? Unearthing Fossils Saving Our History...fossils. Paleontology is the scientific study of fossils. Fossils may be shells, bones, or plant leaves, which are called

What Are Fossils? Unearthing Fossils Saving Our History...fossils. Paleontology is the scientific study of fossils. Fossils may be shells, bones, or plant leaves, which are called

Notes SPI 0807.5.5 Fossils What Are Fossils? Fossils are the preserved physical remains of deceased organisms that are at least 10,000 years old NOTE:

Notes SPI 0807.5.5 Fossils What Are Fossils? Fossils are the preserved physical remains of deceased organisms that are at least 10,000 years old NOTE:

1 Notes SPI 0807.5.5 Fossils DEC 2012 What Are Fossils? The preserved physical remains of deceased organisms that are at least 10,000 years old NOTE:

1 Notes SPI 0807.5.5 Fossils DEC 2012 What Are Fossils? The preserved physical remains of deceased organisms that are at least 10,000 years old NOTE: