Most people are familiar with icebergs. They are a hazard to maritime traffic and have caused dramatic catastrophes such as the sinking of the Titanic. Little notice has been paid to the terrestrial form, the rockberg. Generally, they are found in remote areas and when they calve off of a major canyon, they are not a great threat to towns and cities.
This big rockberg may be an exception, however. It is enormous and is drifting across the plain at an astonishing speed, threatening any townships and villages in it’s path. I have alerted the USGS (United States Geological Survey) of it’s existence, course and speed. So far I have not heard back from them.

This photo was taken by an Asahi Pentax 6 X 7 medium format film camera and Super-Takumar/6X7 1:2.4/105mm lens with a Zenza Bronica 67mm SY44•2C(Y1) filter using Bergger Pancro 400 film, the negative scanned by an Epson Perfection V600 and digitally rendered with Photoshop.