Hi Bob... The suggestion by Paige to have a look at The Paleomap Project by Christopher R. Scotese, http://www.scotese.com/ is excellent since it will give you a very good overview of the evolution of plate tectonics and continents since late Jurassic times (admitting that angiosperms are not older). For the needs of you study I believe that you need maps that are less general and more concentrated on the Panthalassa (former Pacific) and Circum-Pacific areas. I shall have a look to the litterature I have here and see what maps I can come up with. Don't hesitate to contact me directly to give me more details on your project... Luc - in a sunny South East France almost early spring !!! Welcome aboard Luc And Mark I would be interested to here more about your cretaceous woodland. I have been looking for some information that both of you may know but I have not been able to find. What I am looking for are maps of the world going back to the time of origin of flowering plants and to the present. ? I have been studying the genus Iris for a number of years and have pondered the distributions of related species that seem to have become separated. I am hoping that maybe these maps may help me understand how certain Iris are along the pacific coast of the USA and their closest relatives are in the Himalayas. Another species that lives in the SE USA seems to be related to plants in China or Japan. Do you know of any published maps like I am seeking? Bob Pries, in the Missouri Ozarks USA.