Evidence for Plate Tectonics

1
Evidence for Plate Tectonics

• Magnetic Reversals

2

• Fossils of Mesosaurus are found on
  _______________________ and on Africa.
• Coastline _______ is what started the thinking on
  plate tectonics.
• The Appalachian Mts. Match mountains found in
  _________ when the plates are put back together.
• The ____________________ is diverging at a rate
  of 2.5 to 3cm per year.
• _________________ is credited for discovering
  Plate Tectonics.

3

• Fossils of Mesosaurus are found on South America
  and on Africa.
• Coastline _______ is what started the thinking on
  plate tectonics.
• The Appalachian Mts. Match mountains found in
  _________ when the plates are put back together.
• The ____________________ is diverging at a rate
  of 2.5 to 3cm per year.
• _________________ is credited for discovering
  Plate Tectonics.

4

• Fossils of Mesosaurus are found on South America
  and on Africa.
• Coastline Shape is what started the thinking on
  plate tectonics.
• The Appalachian Mts. Match mountains found in
  _________ when the plates are put back together.
• The ____________________ is diverging at a rate
  of 2.5 to 3cm per year.
• _________________ is credited for discovering
  Plate Tectonics.

5

• Fossils of Mesosaurus are found on South America
  and on Africa.
• Coastline Shape is what started the thinking on
  plate tectonics.
• The Appalachian Mts. Match mountains found in
  Europe when the plates are put back together.
• The ____________________ is diverging at a rate
  of 2.5 to 3cm per year.
• _________________ is credited for discovering
  Plate Tectonics.

6

• Fossils of Mesosaurus are found on South America
  and on Africa.
• Coastline Shape is what started the thinking on
  plate tectonics.
• The Appalachian Mts. Match mountains found in
  Europe when the plates are put back together.
• The Mid-Atlantic Ridge is diverging at a rate of
  2.5 to 3cm per year.
• _________________ is credited for discovering
  Plate Tectonics.

7

• Fossils of Mesosaurus are found on South America
  and on Africa.
• Coastline Shape is what started the thinking on
  plate tectonics.
• The Appalachian Mts. Match mountains found in
  Europe when the plates are put back together.
• The Mid-Atlantic Ridge is diverging at a rate of
  2.5 to 3cm per year.
• Alfred Wegner is credited for discovering Plate
  Tectonics.

8
Magnetic Reversals

• Newly formed _____________ at spreading centers
  has the current polarity of Earths present
  _____________.
• As you go away from the _______________, the
  polarity of the crust changes, or alternates
  _____________.
• A rocks ________ is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has ________ many times in
  the past. Definite reasons for this are
  _________.

9
Magnetic Reversals

• Newly formed oceanic crust at spreading centers
  has the current polarity of Earths present
  _____________.
• As you go away from the _______________, the
  polarity of the crust changes, or alternates
  _____________.
• A rocks ________ is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has ________ many times in
  the past. Definite reasons for this are
  _________.

10
Magnetic Reversals

• Newly formed oceanic crust at spreading centers
  has the current polarity of Earths present
  magnetic field.
• As you go away from the _______________, the
  polarity of the crust changes, or alternates
  _____________.
• A rocks ________ is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has ________ many times in
  the past. Definite reasons for this are
  _________.

11
Magnetic Reversals

• Newly formed oceanic crust at spreading centers
  has the current polarity of Earths present
  magnetic field.
• As you go away from the spreading center, the
  polarity of the crust changes, or alternates
  ______________.
• A rocks ________ is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has ________ many times in
  the past. Definite reasons for this are
  _________.

12
Magnetic Reversals

• Newly formed oceanic crust at spreading centers
  has the current polarity of Earths present
  magnetic field.
• As you go away from the spreading center, the
  polarity of the crust changes, or alternates back
  and forth.
• A rocks ________ is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has ________ many times in
  the past. Definite reasons for this are
  _________.

13
Magnetic Reversals

• Newly formed oceanic crust at spreading centers
  has the current polarity of Earths present
  magnetic field.
• As you go away from the spreading center, the
  polarity of the crust changes, or alternates back
  and forth.
• A rocks polarity is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has ________ many times in
  the past. Definite reasons for this are
  _________.

14
Magnetic Reversals

• Newly formed oceanic crust at spreading centers
  has the current polarity of Earths present
  magnetic field.
• As you go away from the spreading center, the
  polarity of the crust changes, or alternates back
  and forth.
• A rocks polarity is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has reversed many times in
  the past. Definite reasons for this are ________.

15
Magnetic Reversals

• Newly formed oceanic crust at spreading centers
  has the current polarity of Earths present
  magnetic field.
• As you go away from the spreading center, the
  polarity of the crust changes, or alternates back
  and forth.
• A rocks polarity is defined when the rock cools
  (or when it is formed). This is evidence the
  Earths magnetic field has reversed many times in
  the past. Definite reasons for this are unknown.