In 1915 Otto Follmann published a new account, adding to the extent of scientific understanding at that time, the Abriss der Geologie der Eifel ("Abstract of the geology of the Eifel region".
En 1915 Otto Follmann deu a luz un traballo que se sumou á comprensión científica nese momento, o Abriss der Geologie der Eifel ("Resume de xeoloxía do Eifel").