Transcript 225 Million Years Ago

LAB 6:
EARTH’S
MOVING
CONTINENTS
Key Question:
Have the continents & oceans always been
in the same positions they are today?
CONVECTION in the mantle
DRIVES CONTINENTAL DRIFT
1. Alfred Wegener –
Proposed the theory of
continental drift
(1912)
Evidence
Supporting
CONTINENTAL DRIFT THEORY
and that
PANGEA
once existed
(1) The continents, especially South
America and Africa seem to
FIT TOGETHER LIKE A PUZZLE
(2) PLANT & ANIMAL FOSSILS were
very similar, yet they were found on
different continents
(3) GLACIAL GROOVES in India indicate
that the subcontinent must have been in
a different location than it is today
(4) GPS TRACKING of the current
tectonic plate movement
(5) There are SIMILAR ROCK TYPES on
opposite sides of the Altlantic Ocean
(6) Today, the
MODERN (insect-eating) MAMMALS
on each continent are similar & distantly
related
(7) There are SUTURE ZONES (areas
where 2 continents come together to
form 1 continent)…mountains form
(8) MOUNTAIN RANGES LINE UP when
the continents are moved together
LAB 6
VOCABULARY
53. Pangea –
A supercontinent from 250 m.y.a. that
included all the Earth’s continental crust
1. Alfred Wegener –
Proposed the theory of continental drift
(1912)
13. Continental Drift Theory –
Theory that the continents were in one
position, have moved and continue to
move
16. Glacial Grooves –
Evidence of glacial movement on land
18. Glaciers –
Large mass of ice formed on land that flows
down or out due to its own weight
48. Suture Zones –
Areas where two continents come together to
form one continent at continent-continent
collision zones
225 Million Years Ago
200 Million Years Ago
135 Million Years Ago
65 Million Years Ago
Present Day
Breakup of PANGEA
The Future…