Photograph of water running in between two mountains. Two wires cut across the top half of the photograph.

Photograph of a blue light post at the corner of an intersection. The light post is framed by two large rocks and some vegetation while a mountain sits in the distance.

Photograph of a car driving along a curved road that is between two tree covered mountains. A river sits to the left of the road, a speed limit sign sits to the right.

Photograph of three chipmunks siting on a large rock at the edge of a body of water. Trees and a rocky landscape can be seen lining the water in the background.

Photograph of a mountain that is partially covered in snow. The surface of the mountain has a rocky texture and is a dark brown that contrasts the sky which is tinted a light green shade.

Photograph of a field of grass in Colorado. The sky is almost completely clear except for a few small clouds in the distance.

Photograph of a tree lined flowing river with large rocks scattered through it.

Photograph of a forest lined body of water with mountains in the background. A person can be seen looking out at the water and forest.

Report issued by the Bureau of Mines over the Iron Mountain magnetite deposits. As stated in the introduction, "magnetic, gravity, and geologic surveys were made to permit an estimate of the extent and magnitude of the Iron Mountain, Colorado, titaniferous magnetite deposit" (p. 1). This report includes tables, maps, and illustrations.

A report about the known facts about the minerals that make up the rocks, soils, and ore deposits of Colorado.

"A summary of the first 100 years of published knowledge, including the chief occurrences of 445 mineral species."

Photograph of seven people walking and climbing up the side of a mountain. The white icy areas of the mountain contrast the dark color of the dirt and rocks and also cause the people to stand out against it.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "New pole-vaulting champion George Davies, Oklahoma State soph, contemplates his accomplishment after clearing 15-101/4 for a world record in the Big Eight track and field championships Saturday at Boulder, Colo."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "World ruling Oklahoma State pole vaulter George Davies, who just stopped bouncing around on the earth like a cross-bar had a 15-101/4 up in the Colorado skies, declared, "I thought this was my day.."

Photograph of pink, purple, and white flowers in Colorado. The flowers are not in focus, very vibrant and contrast against the greenery.

Report issued by the Bureau of Mines over heavy sandstone deposits in the Four-State area of the U.S. Details of the geology and an estimate of resources are presented. This report includes tables, maps, and illustrations.

Photograph of a curving river through the Colorado landscape. Green trees and grass line the river bank and contrast the cloudy sky.

Photograph of a river lined with rocks and grass that is leading towards a mountain side dotted with trees.

Photograph of a rushing river that is lined with tall dark green trees. The water crashes against large boulders and rocks sitting in the river.

Report issued by the U.S. Bureau of Mines discussing sinking and excavation of large-diameter access shafts. As stated in the introduction, "this information circular describes the application of modern methods and equipment in sinking a vertical, 916-foot-deep by 16-foot-diameter, concrete-lined access shaft for the Harold D. Roberts tunnel near Montezuma, Colo." (p. 1). This report includes maps, tables, illustrations, and photographs.

Photograph of a snow capped mountain range taken from a distant field. A forest and smaller mountains separate the larger mountain range from the field.

Photograph of a river bank covered in patches of snow with trees and some grass. Large rocks and a ridge sit in the background behind the trees.

From introduction: The greatest known potential oil resource in the world occurs in the oil shale of the Green River formation, and the richest and thickest deposits occur within the area of this report. The purpose of this investigation was to obtain data on the stratigraphic distribution and areal extent of the oil-shale beds and to estimate the potential oil resources in the area.

Report issued by the U.S. Bureau of Mines discussing uranium mining costs and methods on the Colorado Plateau. Costs of labor, transportation, and explosives, as well as mining methods and practices used, are presented. This report includes maps, tables, illustrations, and photographs.