coal seam
noun
: a bed of coal usually thick enough to be profitably mined
Example Sentences
Recent Examples on the Web In fact, not a single coal seam has been found in rocks of this vintage anywhere in the world. 
Chris Mays, Scientific American, 23 June 2022 In more positive news, Colorado is getting a bunch of money from the federal infrastructure bill to help contain such coal seam fires, Michael Booth reports for the Colorado Sun. Los Angeles Times, 10 Feb. 2022 It was followed by a second unconventional resource called coalbed methane (coal seam gas in Australia). Ian Palmer, Forbes, 18 Oct. 2021 The company’s Deer Run complex in Montgomery County began smoldering in 2014 and did not resume operating until 2019, when federal authorities approved a new underground shaft to an untouched section of the coal seam. Michael Hawthorne, chicagotribune.com, 17 Sep. 2021 The Powder River Basin, which plays host to massive coal seams and some of the world's largest coal mines, lies mainly in Wyoming and in recent years has churned out 40% of the country's product. Mark Olalde, USA TODAY, 10 Apr. 2020 Beyond the bridge the road twisted past soft cliffs smoking with burning coal seams. New York Times, 18 Feb. 2020 Eventually, this carbon-rich system transformed into the thick coal seams mined around the world today. Deming Wang, National Geographic, 8 Aug. 2019 Founded in 1862 after rich coal seams were discovered in the region, Trinidad was a company town by 1910. Martin J. Smith, Los Angeles Times, 12 Sep. 2019 See More
Chris Mays, Scientific American, 23 June 2022 In more positive news, Colorado is getting a bunch of money from the federal infrastructure bill to help contain such coal seam fires, Michael Booth reports for the Colorado Sun. Los Angeles Times, 10 Feb. 2022 It was followed by a second unconventional resource called coalbed methane (coal seam gas in Australia). Ian Palmer, Forbes, 18 Oct. 2021 The company’s Deer Run complex in Montgomery County began smoldering in 2014 and did not resume operating until 2019, when federal authorities approved a new underground shaft to an untouched section of the coal seam. Michael Hawthorne, chicagotribune.com, 17 Sep. 2021 The Powder River Basin, which plays host to massive coal seams and some of the world's largest coal mines, lies mainly in Wyoming and in recent years has churned out 40% of the country's product. Mark Olalde, USA TODAY, 10 Apr. 2020 Beyond the bridge the road twisted past soft cliffs smoking with burning coal seams. New York Times, 18 Feb. 2020 Eventually, this carbon-rich system transformed into the thick coal seams mined around the world today. Deming Wang, National Geographic, 8 Aug. 2019 Founded in 1862 after rich coal seams were discovered in the region, Trinidad was a company town by 1910. Martin J. Smith, Los Angeles Times, 12 Sep. 2019 See More Word History
First Known Use
1756, in the meaning defined above