Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Messel Pit Fossil Site' has mentioned 'Mining' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| The pit first became known for its wealth of fossils around 1900, but serious scientific excavation only started around the 1970s, when falling oil prices made mining the quarry uneconomical. | WIKI |
| Commercial oil shale mining ceased in 1971 and a cement factory built in the quarry failed the following year. | WIKI |
| In the few years between the end of mining and 1974, when the state began preparing the site for garbage disposal, amateur collectors were allowed to collect fossils. | WIKI |
| Discovered through mining activities, the area has now been preserved and has been the subject of important paleontological research, which has greatly contributed to our knowledge of evolutionary history. | UNESCO |
| Once mining was discontinued in the late 1960xe2x80x99s, the site was opened to private prospection and even proposed as a refuse dump in 1971, a threat that led to increased scientific prospection and public concern. | UNESCO |
| Although much material has been taken from the site - approximately 20 million tonnes of rock in a century of mining activities - the volume of fossil-bearing oil shale sediments is still massive and far from depleted. | UNESCO |
| Operations in the mine are governed by the Federal Mining Act. | UNESCO |