Origin of Fuller's Earth in the Mesozoic of Southern England

@article{HALLAM1968OriginOF,
  title={Origin of Fuller's Earth in the Mesozoic of Southern England},
  author={A. HALLAM and B. W. SELLWOOD},
  journal={Nature},
  year={1968},
  volume={220},
  pages={1193-1195}
}
The mineralogical composition of two celebrated English fuller's earths indicates their derivation from volcanic ash. The broader implications of this first record of Mesozoic vulcanicity in the British area are briefly discussed.