Abstract Salt mining along with natural and human-induced salt dissolution affects the ground over Permian and Triassic strata in the UK. In England, subsidence caused by salt mining, brine extraction and natural dissolution is known to have occurred in parts of Cheshire (including Northwich, Nantwich, Middlewich), Stafford, Blackpool, Preesall, Droitwich and Teeside/Middlesbrough; it also occurs around Carrickfergus in Northern Ireland. Subsidence ranges from rapid and catastrophic failure to gentle sagging of the ground, both forms being problematical for development, drainage and the installation of assets and infrastructure such as ground source heat pumps. This paper reviews the areas affected by salt subsidence and details the mitigation measures that have been used; the implications for planning in such areas are also considered.

ABSTRACT This annual meeting of the North-Central Section of the Geological Society of America provides an opportunity to visit a working underground salt mine on a field trip. The trip leaders will take a group into the Detroit Salt Mine, which is located approximately 1200 ft (364 m) deep beneath a portion of the city of Detroit, Michigan. This mine extracts salt through a room and pillar mining process from the Silurian Salina "F" Salt formation. Currently the mined salt is used primarily as crushed salt for ice control throughout the upper Midwest. The company is mining a 30-ft-thick seam of bedded halite. Thin beds of anhydrite and/or dolomite are occasionally interbedded with the high-purity halite.

Abstract Cancrinus’ work, First Principles of the Science of Mining and Salt Mining, which was published in twelve volumes between the years 1773 and 1791 in Frankfurt, Germany, was the first attempt to organize and coordinate the existing mineralogical, geologic, and engineering knowledge of its day into a comprehensive tome of applied technology. It was translated into Russian, and parts of it into French, and was considered the most complete standard work of reference at the time. As such it documents the achieved knowledge of the time as well as its errors and misconceptions. For this reason it is an important artifact in the history of science and technology. Then, as now, it would appear that technology lagged behind science. Library investigation has revealed that this work was published as twelve volumes in ten books. This translated volume is the first part containing the mineralogy.

Thick salt deposits are present in the Middle Pennsylvanian Paradox Member of the Hermosa Formation in the Paradox Basin of southeast Utah and southwest Colorado. Data suggest that the original thickness of these deposits was from 5000–6000 feet. Locally, however, these deposits have been subjected to intense deformation and flow, resulting in thicknesses as great as 14,000 feet. Each salt bed is part of a series of partial and complete evaporite cycles which show a lateral and vertical change in facies. Varve counts in the salt beds give an indication of deposition rates of time-equivalent carbonate beds. Black sapropelic shales are interbedded with the salt beds. It appears that the euxinic environment in which the shales were deposited persisted during the deposition of salt. An understanding of the stratigraphy of the salt deposits has made possible a more complete depiction of early tectonic events involving the salt basin. These studies indicate that many of the salt anticlines in the basin were formed along trends of originally thick salt beds, and that upward growth of these anticlines possibly began during the late stages of salt deposition.