The Barber County Earthquake of January 6, 1956

A few minutes before 6 a.m. on January 6, 1956, south-central Kansas experienced the strongest earthquake to occur in the state since 1929. It was reported felt in south-central Kansas and northcentral Oklahoma; from Dodge City, Kansas, approximately 200 km (125 miles) east to Garden Plain, Kansas, and from Great Bend, Kansas, approximately 230 km (145 miles) south to Longdale, Oklahoma. The maximum effect was felt in the area delimited by Pratt and Coldwater, Kansas, and Alva, Oklahoma. During this investigation the effects of the earthquake were determined and isoseismal lines were drawn (Fig. 1). The area was visited during the period of January 23 to 25, at which time residents in approximately 50 towns were questioned. The greatest amount of time was spent in the zones of intensity III to V (Modified Mercalli Intensity Scale of 1931). The early hour of occurrence hampered the investigation' somewhat, for it was difficult, especially in the zones of lower intensity, to find persons who were awake and who had felt the shock. Sheriff's offices and newspaper offices were visited, for they generally had been notified by anyone who felt the shock. Hospitals proved to be another good source of information. At the end of January several areas adjacent to the limit of perceptibility, for which sufficient information had not been obtained, were investigated by mail, and at the end of February additional inquiries were sent to 15 towns in Oklahoma in order to define the southern limit of perceptibility. The cooperation of all who were questioned is very much appreciated. It is the desire of the author to acknowledge in particular the aid of city and county officials and of newspaper publishers

The Barber County Earthquake of January 6, 1956

A few minutes before 6 a.m. on January 6, 1956, south-central Kansas experienced the strongest earthquake to occur in the state since 1929. It was reported felt in south-central Kansas and northcentral Oklahoma; from Dodge City, Kansas, approximately 200 km (125 miles) east to Garden Plain, Kansas, and from Great Bend, Kansas, approximately 230 km (145 miles) south to Longdale, Oklahoma. The maximum effect was felt in the area delimited by Pratt and Coldwater, Kansas, and Alva, Oklahoma. During this investigation the effects of the earthquake were determined and isoseismal lines were drawn (Fig. 1). The area was visited during the period of January 23 to 25, at which time residents in approximately 50 towns were questioned. The greatest amount of time was spent in the zones of intensity III to V (Modified Mercalli Intensity Scale of 1931). The early hour of occurrence hampered the investigation' somewhat, for it was difficult, especially in the zones of lower intensity, to find persons who were awake and who had felt the shock. Sheriff's offices and newspaper offices were visited, for they generally had been notified by anyone who felt the shock. Hospitals proved to be another good source of information. At the end of January several areas adjacent to the limit of perceptibility, for which sufficient information had not been obtained, were investigated by mail, and at the end of February additional inquiries were sent to 15 towns in Oklahoma in order to define the southern limit of perceptibility. The cooperation of all who were questioned is very much appreciated. It is the desire of the author to acknowledge in particular the aid of city and county officials and of newspaper publishers

Maine Geological Survey - Bulletin 6 : Pegmatites and Associated Rocks in the Newry Hill Area, Oxford County, Maine.

Maine Geological Survey - Bulletin 6 : Pegmatites and Associated Rocks in the Newry Hill Area, Oxford County, Maine. Joseph M. Trefethen, State Geologist. by Vincent E. Shainin, University of Maine and Louis F. Dellwig, U.S. Geological Survey. Maine Development Commission, Augusta, Maine, 1955https://digitalcommons.usm.maine.edu/me_collection/1016/thumbnail.jp

Plastic Flowage of Salt in Mines at Hutchinson and Lyons, Kansas

Plastic flowage in the pillars and floors of salt mines at Hutchinson and Lyons, Kansas, is indicated by buckling, spalling, and fracturing. Detailed measurements of the relative size of the pillars in newly opened rooms and crosscuts were made over a period of 11 months. These data indicate that the salt flowage is due to pressure of the overburden and is controlled by the volume of salt excavated and configuration of the excavation. Plastic flowage causes folds and fractures to develop only in the floor of the Lyons mine. The orientation of structures and rates of flowage in the base, top, and middle of pillars are governed by the direction of easiest relief of stress, which is controlled by the mining plan

Plastic Flowage of Salt in Mines at Hutchinson and Lyons, Kansas

Plastic flowage in the pillars and floors of salt mines at Hutchinson and Lyons, Kansas, is indicated by buckling, spalling, and fracturing. Detailed measurements of the relative size of the pillars in newly opened rooms and crosscuts were made over a period of 11 months. These data indicate that the salt flowage is due to pressure of the overburden and is controlled by the volume of salt excavated and configuration of the excavation. Plastic flowage causes folds and fractures to develop only in the floor of the Lyons mine. The orientation of structures and rates of flowage in the base, top, and middle of pillars are governed by the direction of easiest relief of stress, which is controlled by the mining plan

United States Geological Survey Reports

A report about the occurrence, distribution, and quantities of beryl and other strategic minerals in pegmatites located in the Newry Hill area, Maine

United States Geological Survey Report 285

From abstract: An area 2,200 feet long and 400 to 1,300 feet wide within the Haputa ranch, Custer County, Colo., has been mapped at a scale 1:1,200. The rocks in this area consist of quartz-hornblende schist, granite gneiss, hornblende-andesine gneiss, gabbro and peridotite, microcline granite, and pegmatite, of pre-Cambrian age, and lamprophyre dikes of Tertiary age

Backscatter and Dielectric Measurements from Rocks of South-Eastern Utah at C-, X-and K\u3csub\u3eu\u3c/sub\u3e-bands

Radar backscatter from bare sandstones, shales and limestones was measured in May 1982 in the Monument Upwarp region of south-eastern Utah using a helicopter-borne 4-4-17-6 GHz multipolarization radar scatterometer. Rock samples for laboratory analysis were collected and surface conditions described. The purpose of the experiment was to observe the backscatter from selected rock formations as a function of incidence angle, frequency and polarization to determine the degree of correlation with the permittivity and roughness of the rocks. An additional goal was to measure the permittivity of the rock samples using free space, waveguide and in situ methods. The permittivity of the sandstone ranged from 3·0 to 3·75, the shales from 4·2 to 5·0, and the limestones from 7·5 to 8·5. Multiple linear regression analysis of the data indicated a high (greater than 90 per cent) correlation between the radar backscatter and the permittivity of the rocks