Was Laurasia the southern landmass that broke away from Pangaea?
No, Laurasia was the northern landmass that broke away from
Pangaea. The modern day continents located in Laurasia were Europe
(without Balkans), Asia (without India), and North America.
Gondwana was the southern landmass that broke away from Pangaea.
The modern day continents and countries located in Gondwana were
Africa, South America, Australia, India, Arabia, Antarctica, and
the European Balkans.