There was a problem when proofreading this page.
 | An image should appear at this position in the text. A high-res raw scan of the page is available. To use it as-is, as a placeholder, edit this page and replace "{{missing image}}" with "{{raw image|Quarterly Journal of the Geological Society of London, vol. 26.djvu/881}}". If it needs to be edited first (e.g. cropped or rotated), you can do so by clicking on the image and following the guidance provided. [Show image]  | |
