High School Earth, Space, and Geophysical Curriculum Essentials May 2009 9. Boulder Valley School District High School Earth, Space, and Geophysical. Science Curriculum Essentials Document. Enduring Understandings. are the big ideas central to a content area that have lasting value beyond the classroom and.
See also: Coal gasification and Coal seam gas. Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities.
o All sandstone contains pores, but tight gas sand has pores with very narrow capillaries. o Has very low permeability. Coalbed methane refers to: o A form of unconventional gas that is mined from coal beds. Shale Gas refers to: o Shale gas comes from micro pores, which is fractures in what are normally seal rocks. o Oil that is extracted from fractures in shale beds.