Images

Although large streamgage structures are no longer necessary, the USGS still uses some of them to contain modern streamgage equipment.

USGS topographer Yukio Yamamoto in Littlefield, Texas with a theodolite and an Electrotape distance measuring unit.

The 1961 fissure eruption near Nāpau Crater was a short-lived but notable event on Kīlauea’s East Rift Zone, occurring in late September. Over two days, lava erupted from vents along a 13-mile stretch, producing 13 small flows and lava fountains that reached heights of up to 400 feet, with the largest flows occurring near Pāhoa.

The July 1961 eruption at Halemaʻumaʻu was the third summit eruption of that year, continuing the pattern of vigorous volcanic activity at Kīlauea. This event featured sustained lava fountaining and further infilling of the crater, building upon the changes initiated by the February and March eruptions.

The March 1961 eruption at Halemaʻumaʻu was the second of three summit eruptions at Kīlauea that year, marked by renewed lava activity within the northeast collapse pit formed in February. This phase featured vigorous lava fountaining, crater floor uplift, and the gradual infilling of the pit, reflecting continued magma supply and dynamic summit processes.

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).

Stereoscopic control point check.

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.

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

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.

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.

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

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

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).