i have grossly understated the size of the hole. i've blinked a few times since i actually looked at it. it is actually closer to 1/4" in size....so roughly 6mm's. anyway, it looks like whomever got to skidding on the tire and ripped a knobby off. 120tpi, eh? score for 60tpi durability...lol! i've skidded those plenty on gravel and that's never happened
thank you all muchly for the input.
not sure if any of my glues are still viable. and, i believe all i have currently are the stick on/instant patches. i know...they suck. gotta get some proper patching kit!