overburden
21overburden — v. burden excessively with weight or worry …
22Overburden — Any material, consolidated or unconsolidated, that overlies a coal deposit. U.S. Dept. of Energy, Energy Information Administration s Energy Glossary …
23overburden — verb burden excessively. noun 1》 rock or soil overlying a mineral deposit, archaeological site, etc. 2》 an excessive burden. Derivatives overburdensome adjective …
24overburden — verb (transitive usually passive) to give someone or a system too much work or too many problems to deal with: an overburdened donkey (+ with): a student overburdened with essays …
25overburden — o•ver•bur•den v. [[t]ˌoʊ vərˈbɜr dn[/t]] n. [[t]ˈoʊ vərˌbɜr dn[/t]] v. t. 1) to load with too great a burden 2) an excessive burden 3) min waste earth covering a mineral deposit • Etymology: 1570–80 …
26overburden — verb (t) /oʊvəˈbɜdn/ (say ohvuh berdn) 1. to load with too great a burden; overload. –noun /ˈoʊvəbɜdn/ (say ohvuhberdn) 2. an excessive burden. 3. unwanted material, overlying a mineral deposit …
27overburden — v. & n. v.tr. burden (a person, thing, etc.) to excess. n. 1 rock etc. that must be removed prior to mining the mineral deposit beneath it. 2 an excessive burden. Derivatives: overburdensome adj …
28coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …
29Coal mining — Men leaving a UK colliery at the close of a shift Surface coal mining in Wyo …
30Mountaintop removal mining — Mountaintop removal site Mountaintop removal in Martin County, Kentucky M …
