[Apostle Wilford Woodruff Journal] 19th + We visited the Country or spot Called the land slide. It has the Appearance of A great Convulsion of Nature. It looks as much like the Effects of An Earthquake as any thing. More than 20 acres of land is all torn to peaces. Some large Maples trees are still standing upright but the earth has settled more than 20 feet while other parts were raised. Deep blue clay is raised from its deep foundation to the top of the Earth by thousands of tons. After walking over it we road into Portland & dined with Ilus Carter. Spent the Evening with Dr Fabyan & night with Ezra. 12.
[source: Wilford Woodruff's Journal: 1833-1898 Typescript, Volumes 1-9, Edited by Scott G. Kenney, Signature Books 1993, http://amzn.to/newmormonstudies]