coalbed
Subterranean fuel deposit
A coalbed is a layer or seam of coal within the earth, formed from compressed ancient plant material.
The term appears most often in discussions of mining and energy extraction: coalbed methane refers to natural gas trapped within coal deposits, released during mining or extracted commercially.
Joined fabric edge
- stratumHorizontal layer of material
- depositPlace for safekeeping
- sedimentaryFormed from deposited material
- peatWaterlogged decomposed vegetation
lignite · bituminous · anthracite · organic · ancient forests · swamps · decomposition · geological
Beneath earth's surface
- strataParallel geological layers
- seamJoined fabric edge
- depthDistance below surface
- aquiferGroundwater-bearing geological formation
groundwater · geology · bore · core sample · outcrop · syncline · anticline · fault
Subterranean hydrocarbon fuel
- biogasFuel from anaerobic decomposition
- adsorptionAccumulation on a surface
- permeabilityAbility to transmit fluids
- reservoirLarge water storage basin
drilling · fracking · hydraulic fracturing · dewatering · cleat · fracture · wellbore · production
Act of unearthing
- shaftNarrow vertical passage
- tunnelEnclosed underground route
- gallerySpace for displaying artwork
- longwallFull-seam mining approach
strip · overburden · conveyor · miner · headlamp · ventilation · canary · subsidence
seam
Joined fabric edge
- stratumHorizontal layer of material
- depositPlace for safekeeping
- sedimentaryFormed from deposited material
peat · lignite · bituminous · anthracite · organic · ancient forests · swamps · decomposition · geological · hydrocarbon
subterranean
Beneath earth's surface
aquifer · groundwater · geology · bore · core sample · outcrop · syncline · anticline · fault · roof
natural gas
Subterranean hydrocarbon fuel
- biogasFuel from anaerobic decomposition
- adsorptionAccumulation on a surface
- permeabilityAbility to transmit fluids
reservoir · drilling · fracking · hydraulic fracturing · dewatering · cleat · fracture · wellbore · production · exploration
excavation
Act of unearthing
longwall · strip · overburden · conveyor · miner · headlamp · ventilation · canary · subsidence · pillar
anthracite
Highest-grade coal variety
smolder · embers · BTU · calorific · ash · sulfur · coke · stoker · grate · clinker