Trench at Las Vegas Valley Big Dig
![Trench at Las Vegas Valley Big Dig](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Fig%209.jpg?itok=gZl5ut8t)
Detailed Description
Photograph from inside of one of the trenches as it appeared shortly after excavation during the Big Dig of 1962-63. Ten trenches totaling more than 2.13 km in length were excavated, including Trench K, which itself was more than a kilometer long! USGS scientists continue to refine the geologic and chronologic frameworks that Dr. Haynes established. (Photograph courtesy of the San Bernardino County Museum.)