Any Geoligests here

Cuda Hunter said

So, we really need to know where it was found.
Then we can look at a stratigraphic map and figure out what layer it derived from.

I am unfamiliar with where K-Pax is.
Rivers and glaciation can more rocks thousands of miles but they are traceable. Location is the partial answer to this mystery.

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Correct, in my part of the state in Washington we have deposits of red rock which is normally only found in the snake river Idaho area. Post ice age floods brought it and also created the scablands just northeast of my area which is a basalt flood plane which is though to be from the same volcano that is now under Yellowstone I love ancient landscapes