Studying the distribution of Jurassic faunas, he concluded that an equatorial ocean stretching from India to Central America must have separated a large continent in the northern hemisphere from one in the southern hemisphere.
Estudando a distribución das faunas xurásicas, concluíu que existiu un océano ecuatorial que se estendía desde a India a América Central que separaba un gran continente do hemisferio norte doutros do hemisferio sur.