Transcript Evidence Of seafloor spreading

EVIDENCE OF SEAFLOOR
SPREADING
By: Mariah Seaman and Jazmyne Jones
THIS IS..
PANGEA
- Pangea is a large
landmass also known as
“All Earth”.
- Formed 270 million years
ago.
- Broke apart about 200
million years ago.
The Timing After
Pangea Lead To…
SEAFLOOR
SPREADING
-seafloor spreading is
tectonic plates slowly
move away from
each other. Occurs
along mid-ocean
ridges.
- Evidence of seafloor
spreading is..
ANIMALS
-
-
Living animals
separated lands
are similar in India
and Madagascar
Examples are
elephant bird and
ostrich.
FOSSILS
-Fossils on the east side
brazil match with fossils
in western south Africa.
Fossilized life in rock
recorded didn’t fit in the
climate they were
found in ex. (Alaska ,
palm tree leaves )
IT IS A PUZZLE!
- Africa and south
America can fit
together like a
puzzle piece.
- Same as India
and Madagascar
MAGNETIC STRIPES
Magnetic stripes
provide evidence of sea
floor spreading
-striped magnetic
patterns developed ,
Because oceanic crust
pulls apart , magma
rises to the surface at
mid- ocean ridges.
MORE SEAFLOOR INFORMATION!
• Seafloor spreading formed 270 million years ago
• Broke apart about 200 million years ago
• Sea floor spreading is one of the two major processes of the
plate tectonics.
• Volcanoes and other features that grow or fall into sea floor
spreading to move and sink with the sea floor spreading over
time .
• the sea floor spreading on each side of a mid -ocean ridge
move in different directions each side belongs to a different
lithosphere plate