MESOSAURUS

1
MESOSAURUS
Why do we think it is isolated/restricted to
this shallow marine area? 1.) Smallish marine
reptile short range swimmer? 2.) Not found in
other rocks of same age.
2
GLOSSOPTERIS
Why can we use this fossil? 1.) Terrestrial
plant probably did not travel across huge
ocean basin.
3
BUT WHAT ABOUT A ?........
LAND BRIDGE
1.) There is evidence of a land bridge across
the Bering Strait-exposed during recent glacial
period But too young 2.) Evidence of land
bridge across Atlantic Cant find it.
4
CONCLUSION BEST MODEL SUGGESTS THEY WERE ONCE
CONNECTED