GIS paleontological world maps and transformations

Hello All,

I have some data of where fossils were found, and their gps
coordinates. I'd like to plot where these points would have been in
the Jurassic. Therefore, I'm looking for shapefiles of the continents
during the Jurassic, and also wondering if there are any
transformations out there which would allow me to re-map the gps points
to where they would have been on the earth at that time. Any ideas?

Thanks folks.

Best,
Allie