The crater is expressed as a rimless circular flat-floored depression, 1.2 km (0.75 mi) in diameter, within mountainous and heavily forested terrain.

It is east of the West Coast Range and the former North Mount Lyell Railway formation.

[2] Geophysical investigations and drilling have shown that the crater is filled with up to 230 metres (750 ft) of breccia capped by Pleistocene lake sediments.

[5] Carbonaceous inclusions have been found for the first time in Darwin glass: these have been shown to be biomarkers which survived the Darwin impact and are representative of plant species in the local ecosystem—including cellulose, lignin, aliphatic biopolymer and protein remnants.

[7] While there was a trail leading to the crater in the 1970s, accounts note that it is unmaintained, overgrown and boggy in places.