Tachylite is a volcanic rock. Early geologists in Vredefort
identified something a bit like it, and called it Pseudotachylite. It
is formed largely by frictional melting along faults where the rocks
moved at or after the impact event. Clasts of the country rock
(here granite) are found within. In these images, the Pseudotachylitic
breccia is the black stuff......
GPS receiver for scale...
Note here that the clasts are found mostly on one side
of the Pseudotachylite vein. This exposure about 6 metres long
Not Pseudotachylite. This is the circular 'granophyre' a plug
of rock that is brecciated and includes a meteoritic component
While inspecting this outcrop we encountered a dust devil
As well as the local wildlife
Sudbury in Canada
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