. . "From 140 to 190 million years ago" . . . . . "Abnormal secondary deposits"@en . . . . . "Abnormal conditions of secondary deposits when connected with the Somersetshire and South Wales coal-basin"@en . . . . . . . . "On abnormal conditions of secondary deposits when connected with the Somersetshire and South Wales coal-basin and on the age of the Sutton and Southerndown series"@en . . . . .