Brecia Ejecta Or Something Else?

[Rockmyworld]

Hello everyone,

 

I found this hunk of rock and from my amaturish research I think it's a brecia of various quartz, muscovite and maybe pyrite and sulfides (black stuff?) and was ejected from a meteorite impact. Specimen was located along the lakeshore of Lake Winnipeg along with another identical specimen smaller in size in a different location nearby. 

 

I know a fresh cross section would be helpful but I dont want to damage the pieces as I only have two. 

 

Any help would be much appreciated. Thank you

[echidna]

Looks like just an ordinary piece of slightly water worn granite to me.  Nothing special.

[Geologyhound]

Looks like a typical mineral assemblage for a potassium feldspar granite with some larger grain sizes indicative of slower cooling.  I don’t see any radial fracturing, tektite glass, or melted areas with a glassy appearance.  The individual clear grains mixed in with the other minerals would be quartz, not glass.

[Rockmyworld]

Thanks for the information GeologyHound, you gave me some terms to google to help know what to look for.