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A natural monument is a natural or cultural feature of outstanding or unique value because of its inherent rarity, representative of aesthetic qualities, or cultural significance. [1] They can be natural geological and geographical features such as waterfalls, cliffs, craters, fossil, sand dunes, rock forms, valleys and coral reefs.
Angadippuram Laterite is a notified National Geo-heritage Monument [1] [2] [3] in Angadippuram town in Malappuram district in the southern Indian state of Kerala, India.The special significance of Angadippuram to laterites is that it was here that Dr. Francis Buchanan-Hamilton, a professional surgeon, gave the first account of this rock type, in his report of 1807, as "indurated clay", ideally ...
The grey iron castings were made in Birmingham entirely from locally produced iron. The completed weight of the god Vulcan's figure alone is 100,000 pounds (45,359 kg). When Vulcan's anvil , block, hammer, and spearpoint are added, the statue weighs a total of 120,000 pounds (54,431 kg) and it stands on a 123-foot tall (37 m) pedestal.
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In the period from the 1730s to the 1830s, the Goroblagodatskoye ore management produced 1.2 million tonnes of ore at a production cost of 3-4 kopecks per pood. [12] By the early 2000s, total production at the deposit reached 150 million tonnes of ore. By that time, the average iron content in the mined ore was about 30%. [12]
The iron pillar of Delhi is a structure 7.21 metres (23 feet 8 inches) high with a 41-centimetre (16 in) diameter that was constructed by Chandragupta II (reigned c. 375–415 CE), and now stands in the Qutb complex at Mehrauli in Delhi, India.
High-grade gold ore from the Witwatersrand near Johannesburg. The Witwatersrand Basin is a largely underground geological formation which surfaces in the Witwatersrand. It holds the world's largest known gold reserves and has produced over 40 000 tonnes (1.3 × 10 9 ozt), which represents about 22% of all the gold accounted for above the ...
It supplemented copper extraction with iron and timber production. Production of the iconic falu red paint began in earnest. In the 19th century, iron and forest products continued to grow in their importance. In 1881 gold was discovered in Falun Mine, resulting in a short-lived gold rush. A total of 5 tonnes of gold would eventually be produced.