Science suggests it is due to a large impact crater (Isidis basin) found near Nili Fossae.
Or could the Martian glass, Nili Fossae geological features like its concentric grabens and the Isidis basin be the result of a massive electrical discharge between Mars and another large rocky body?
Especially as the area has Olivine, which is suggested by the Electric Universe theory (EU theory) to be a marker or indicator of extreme electrical discharges between bodies, such as meteorites and in discharge craters (impact craters) or layers. An example of electrical discharge glass on Earth are fulgurites created by lightning discharges.
large glass deposits are present in several ancient yet well-preserved craters scattered across the Martian surface. The study suggests that glass deposits are relatively common impact features on Mars and could be targets for future exploration.
Martian glass: Window into possible past life?
The suggested impact crater Hargraves is near one of the suggested landing sites for the Mars 2020 rover mission. This discovery of Mars impact glass may now make that area a large favourite for the mission.