Darwin glass

On slopes and flat ground between 250 and 500 m elevation, the glass occurs with quartzite fragments buried under peat and soil.

On mountain peaks higher than 500 m, the bedrock is directly exposed to the air, and Darwin glass occurs occasionally on the surface.

[2] Organic compounds such as cellulose and polymers were trapped in the glass at the time of the impact, preserving remnants of plant life.

The discovery of these preserved organic materials by scientists in 2013 has been cited as evidence for the fringe theory of panspermia, which posits that life could be spread between planets or solar system by impacts.

A possible explanation for the chemical differences is that, in addition to being mainly composed of melted local metamorphic rocks, the type 2 glass also contains a component of extraterrestrial material from the meteorite.

[6] The glass is an impactite resulting from the melting of local rocks due to the impact of a large meteorite.

A crater of that size would be created by a meteorite 20 to 50 m in diameter and its impact with Earth would release 20 megatons of energy.