Stratum of coal
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SEAMStratum of coal
underclaya stratum of clay lying beneath a coal bed, often containing the roots of coal plants
underclaysUNDERCLAY, a stratum of clay lying beneath a coal bed, often containing the roots of coal plants
SEAMCoal stratum
SEAMStratum of ore.
SEAMStratum of ore
SEAMStratum of rock
FAULTDislocation of a rock stratum.
stratumsSTRATUM, a layer of material
stratalof a stratum or strata
stratastratum (a layer of material)
stratasSTRATA, stratum (a layer of material)
gravelA stratum or deposit of such stones
stratumlayer of tissue deep stratum of the skin
stratalayer of tissue deep stratum of the skin
aquifera water-bearing stratum of permeable rock, sand, or gravel
seamsthin layer or stratum (as of rock) between distinctive layers
seamthin layer or stratum (as of rock) between distinctive layers
underclassthe lowest social stratum usually made up of disadvantaged minority groups
underclassesUNDERCLASS, the lowest social stratum usually made up of disadvantaged minority groups
transgressive(of a stratum) Overlapping others unconformably, esp. as a result of marine transgression
turfthe upper stratum of soil bound by grass and plant roots into a thick mat
strataregion of the sea or atmosphere that is analogous to a stratum of the earth
turfythe upper stratum of soil bound by grass and plant roots into a thick mat
stratumregion of the sea or atmosphere that is analogous to a stratum of the earth
turfierthe upper stratum of soil bound by grass and plant roots into a thick mat
underclassThe lowest social stratum in a country or community, consisting of the poor and unemployed
underclassesThe lowest social stratum in a country or community, consisting of the poor and unemployed
isopachsan isoline that connects points of equal thickness of a geological stratum formation or group of formations
marlstonea sandy calcareous stratum, containing, or impregnated with, iron, and lying between the upper and lower Lias of England
marlstonesMARLSTONE, a sandy calcareous stratum, containing, or impregnated with, iron, and lying between the upper and lower Lias of England
porositythe ratio, expressed as a percentage, of the volume of the pores or interstices of a substance, as a rock or rock stratum, to the total volume of the mass