@prefix j.0: .
@prefix j.2: .
@prefix rdfs: .
@prefix skos: .
@prefix xsd: .
a skos:Concept ;
rdfs:label "Helm Member"@en ;
j.0:hasBroaderPredominantAge ;
j.0:hasLithologyDescription "Laminated siltstone and mudstone with thinly interbedded, fine-grained sandstone that is pervasively reddened."@en ;
j.0:hasLowerBoundaryDefinition "Base of the lowest reddened laminated siltstone unit where it overlies thickly bedded, unreddened, coarse- to medium-grained sandstone forming the lower part of the Kirkby Moor Formation."@en ;
j.0:hasOldestAge ;
j.0:hasOldestAgeValue 4.227e+02 ;
j.0:hasPredominantAge ;
j.0:hasRockUnitRank ;
j.0:hasThicknessDescription "About 250m"@en ;
j.0:hasUpperBoundaryDefinition "Base of the lowest thick and unreddened sandstone bed from the upper part of the Kirkby Moor Formation."@en ;
j.0:hasYoungestAge ;
j.0:hasYoungestAgeValue 4.19e+02 ;
skos:broader ;
skos:definition "Siltstone with subsidiary mudstone and sandstone and trace mud-flake conglomerate. Stratified bedrock. Occurs onshore. Deposited during the Pridoli Epoch (Silurian Period) (422.7-419 Ma BP)."@en ;
skos:inScheme ;
skos:notation "1HELM"@en ;
skos:prefLabel "Helm Member"@en ;
j.2:term_status "stable"@en .