Macha crater field
The impressive Macha crater field belongs to the best examples of recent bombardment with iron meteorites. These surprisingly fresh looking craters were formed approximately 7,300 years ago.
Name in Russian
Map of the site
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Small lakes at the tributary of Macha river were well known, but only in the 1980s, during an aerial survey, it was noticed that this group of small lakes has surprisingly round form and could be formed by meteorite impact.
The first description of these craters was made in 1984 by Ukrainian scientists Gurov E.P. and Gurova E.P. Today the meteoritic origin of these craters is proved.
In total in this area are five craters. The two largest ones (diameter – 300 and 200 m) form the pear-shaped Abram Lake. The eastern crater (marked with b on the map) is partly filled with alluvial deposits.
The northernmost crater (No.3. on the map) is approximately 20 m deep. It has no lake on the bottom, just a small mire.
Crater No.2. has a round lake and very steep and fresh-looking, sandy slopes around the lake.
Crater No.1. is almost united with the largest crater – Abram Lake.
Macha craters have formed in Quaternary sand and Late Proterozoic sedimentary rocks.
Age of craters has been determined, based on the analysis of charred wood in the walls of ejecta around the craters. Additional proof of meteoritic origin is planar deformation in sand particles.
Small, metal-bearing samples have been found as well – analysis shows that the composition of this material is comparable to the particles of the Tunguska event.
It is assumed that craters were formed by an iron meteorite, exploding with a 150 kT yield.
Macha crater field is included in the following article:
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