Images

The February 1961 summit eruption of Kīlauea marked the beginning of a year of intense volcanic activity, characterized by three distinct summit eruptive phases.

Sand erupted from a fissure overlies the original surface of gravel and cobbles. Looking west, Crillon Lake in middleground, September 1, 1958

Low-level oblique aerial view of Fairweather fault. Photo taken east of North Dome, looking northwest, August 26, 1958.

Artesian well investigations in South Dakota (circa-July 1957).

A USGS map editor plots General Land Office (GLO) data on a Shaw Mountain, Oregon manuscript.

Color separation scribing of the contour plate for a USGS topographic map using a freehand scriber. This handheld stylist was designed to hold a phonograph needle that was sharpened to engrave a .003" scribed line.

Performing color separation scribing of the culture separate of a USGS topographic map using a swivel graver.

Color separation scribing of the intermediate contours for a USGS topographic map using a freehand scriber.

Using a swivel graver with a steel straight edge to scribe a road onto the culture plate of a topographic map.

The application of transparent adhesive-backed type to the culture lettering separate of the Miller Peak, AZ 7.5-minute topographic map.

Panoramic photographic mosaic of several glaciers on the northern slope of Gora Elbrus, a volcanic massif in the Central Caucasus Mountains. The photographic survey was done by N. Nikulin in 1957 during the International Geophysical Year. Photograph courtesy of V.M. Kotlyakov, Russian Academy of Sciences, Moscow.

Bill Campbell operates an Electrical Survey Net Adjuster (ESNA). The ESNA was used for the adjustment of levels and traverse.

Map editor Webb Greenup reviews an overlay of the Atwater, CA 7.5-minute topographic quadrangle map.

Stereoscopic control point check.

This is a stone field marker that marked boundaries for land ownership. In the early days of Land Office Recordings, this is one type of monument used. Trees, Posts, Iron Pipes and as shown stones were used to mark off land during the Land Rush days.

Artesian well investigations in South Dakota (circa 1956-62).

U.S. Geological Survey streamflow-gaging station 08109000 Brazos River near Bryan, Texas, looking upstream from left bank, February 5, 1954.

SIR 2009–5174

This, the first of two repeat photographs, documents significant changes that have occurred during the nine years between photographs A and B. Although Muir Glacier has retreated more than 3 kilometers and thinned more than 100 meters, exposing Muir Inlet, it remains connected with tributary Riggs Glacier. White Thunder Ridge remains devoid of vegetation.

This August 1950 photo documents the significant changes that occurred during the 9 years between photographs A and B. Muir Glacier has retreated more than 2 miles, exposing Muir Inlet, and thinned 340 feet or more. However, it still is connected with tributary Riggs Glacier.

U.S. Geological Survey streamflow-gaging station 08110500 Navasota River near Easterly, Texas, looking downstream from left bank, December 5, 1941.

SIR 2009–5174