Emication

The "theory" of Emication was a brainchild of Nils Heribert Nilsson (1883-1955), an early-20th century Swedish biologist. In his most voluminous work Synthetische Artbildung ("Synthetic speciation"), he laid out his theory. summarizes the thesis of the elegantly printed, two-volume opus, as follows in a review for Science:

It's obvious that Heribert Nilsson either hadn't heard of the concept of continental drift, or he knew but doesn't accept it (nothing too uncommon in the 1950s). Instead, he invoked tremendous tidal waves "for the fact that many fossil floras, such as that of the London Clay, consist of species whose modern relatives live in tropical countries far removed from the site of deposition," as G. Ledyard Stebbins writes in an article for The Quarterly Review of Biology in 1955.

Thoroughly debunked is "Heribert-Nilsson's final line of 'evidence' against evolution consist[ing] of an attempt to criticise certain basic principles of genetics, particularly the linear order of the genes on the chromosomes," as quoted after Stebbins.

So, there is something someone (i.e., the author himself) called a "scientific theory". And it's rubbish. No wonder that creationists take an interest in it — and no one else.