Magma starter: new proof that the mysterious Cali glass really got here from a volcano


New analysis has proved what Alexander von Humboldt claimed in regards to the volcanic origin of the so-called Cali glass practically 200 years in the past.

Cali Glace is a potato-shaped black lump of glass barely smaller than the dimensions of a mean open hand discovered close to town of Cali in western Colombia.

Alexander von Humboldt, a famous German geographer, first described the item in 1823, believing it to be of volcanic origin.

His speculation endured till the early twentieth century, when doubts arose from the speculation that the fabric was really tektite, glass constructed from terrestrial particles ejected throughout meteorite impacts.

Two theories have thus far remained unresolved, together with the precise origins of the Cali Glass.

New analysis by a workforce of Austrian, Brazilian and Colombian scientists led by Ludovic Ferrire, curator of the meteorite assortment on the Pure Historical past Museum Vienna, has proved that Humboldt was completely proper.

“Von Humboldt was proper from the beginning in regards to the origin of this glass,” Ferrire stated in an announcement from the museum.

Calli glass was first described to be of volcanic origin by Alexander von Humboldt, a famend German geographer. (Pure Historical past Museum Wien, Ludovic Ferrire / Zanger)

“Our outcomes additionally recommend that different uncommon glass occasions, for which the origin of a meteorite influence has been suspected, however not absolutely confirmed, needs to be re-examined utilizing the identical methodology we used. has been used.”

The worldwide workforce used a multi-method method that suggests differentiating between the completely different glass formation modes to determine whether or not Cali glass is certainly of volcanic origin.

The most typical type of naturally occurring glass on Earth is volcanic glass or obsidian, which is fashioned when volcanic lava cools quickly with minimal crystal development.

Fulgurites, fashioned when lightning strikes the bottom, and influence glass fashioned throughout meteorite influence occasions, are stated to be very uncommon.

Now solely Humboldt’s declare has been confirmed as a result of it’s thought-about difficult to differentiate between the completely different types of glass that happen naturally on Earth. The examine was revealed within the scientific journal Geology.

Humboldt, who was born in Berlin when it was a part of the Kingdom of Prussia, did quantitative work on botanical geography that laid the inspiration for the sector of biogeography.

He was one of many first to suggest that the continents bordering the Atlantic Ocean, notably South America and Africa, had been as soon as joined.

Extra pertinently at current, he’s believed to have been the primary to explain man-made local weather change, in 1800 and likewise in 1831.

Edited by Richard Pretorius and Kristen Butler

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