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Monturaqui Crater

Main characteristics

Coordinates: 23.9277 S 68.2615 W
No:250        (list of all attractions)
Categories:Impact craters
Values:Geology
Rank:5
Address:South America, Chile, II Antofagasta, in the mountainous desert some 20 km south from Salar de Atacama.
Diameter:350 - 370 m
Depth:Around 34 m
Age:Approximately 660 000 years
Monturaqui Crater, Chile
Monturaqui Crater / Rudolf Reiser, Wikimedia Commons / CC BY-SA 3.0

One of the most impressive meteorite craters in South America is Monturaqui Crater. It was first described in scientific literature in 1966 (Sanchez, Cassidy) – then it got its name too.

This crater was created some 660 000 years ago by a meteorite coming from the north-west. It is speculated that the Campo del Cielo craters in the nearby Argentina appeared at this same time.

The site is located approximately 3,000 m above the sea level. Thus the meteorite had to pass only through half of the total mass of atmosphere, if compared with meteorites, which fall into the sea.

Meteorite here hit a thin layer of volcanic rock – 3.2 million years (Pliocene) old ignimbrites. It penetrated it and smashed a granite under it as well. As the meteorite was falling askew, the crater is elongated in northwest – southeast direction, the steepest edge (35 degrees steep) is in the south-east. Also the rim of the crater in the south is for 10 – 15 m higher than in the north.

In the vicinities of crater and inside it have been found corroded pieces of iron, glassy impactites, Ni-Fe-Co-P spherules.

In the northern part of the crater is located a small, temporary lake, created by the rare rain in summer. This lake has left a layer of lime sediments.

Map

See Monturaqui Crater on the map of Chile!

 

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