About: http://webisa.webdatacommons.org/87267045

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Discovered in the early 1950s, the phenomenon has only been the subject of research since 1969, but a recent report has suggested that the occurrences are mainly upon soils on glacial till over impervious marine shales.
http://www.w3.org/ns/prov#wasQuotedFrom	nzdl.org