specimen metamorphic replacement

That's quite a deduction Deb
our we saying the crystal deteriorated
and was replaced with matrix?


the cat rocks, also?

using Occam razor on rocks
got me into the sharpening business

Shotgunner,( or anybody else willing to take this on) Occam's razor concept is clear enough. I don't have the experience, knowledge, or the terminology to properly describe this piece, please forgive me for being imprecise or making a finite statement when what I was trying to do is ask the question. My desire was to understand what happened to make the rock look like this. I could see the green rectangle in place centered within the red area, Please explain how this piece is granite? don't see granite, though I see the
K-feldspar. Do you mean the feldspar surrounding the green square was originally within that area and as it left, the square was filled with the green matrix? That makes sense, am I "getting" this? I can use some serious explanation here, the reason I made this post to begin with. complete beginner and working hard to understand. Please Help? (Thank you.)

No apology required. You do have to admit, you went pretty technical without much data. Without a geology lab, it is difficult to go beyond speculation.

The big 'square' (your word) piece does look like feldspar to me. Because granite is a mix of minerals, I suppose the "parent stone" (for lack of a batter word) was granite and this is the remains. Because we don't know what was there, we can only suppose.

At least your feline counterpart seems to like it.

Snowmom you live next to lake Michigan correct? I have a very good link for some extra info on PDF if you do.

thanks everybody. I can see how my first question came out as a statement rather than as a question. Completely
unintentional. I am in rock kindergarten and still trying to learn the language, and evidently using words beyond my level of understanding. I do see the red end area in this rock as K-feldspar in color, but it is all fine grained. No crystal structure is visible to the eye in the green/black matrix portions of the rock. many of the small red flecks shows slight feldspar crystal structure. I thought granite was
defined as having discernible crystal structure throughout. On close examination the green/black rectangular area within
the red end of the rock appears to even have the look of foliation layers that so many feldspars have. But it seems to be an impression or a cast and the foliation does not actually exist.
I don't see
how we can call the green/black matrix crystal. So that is why I was thinking "not granite". If I have screwed this up too, please help me understand.
Metamorphic feldspar with unknown(also metamorphic) green matrix/host(rock? what word?) showing an odd rectangular pattern on one end of the rock, on both sides, and having small feldspar crysts imbedded on the other end. Getting there? Correct me if I have messed up again.
I am grateful for the patience shown by all of you as I struggle to learn and sort through so much information in such an unstructured fashion. It is like going to a new country
where you don't speak the language and having to figure everything out at once. I appreciate your kindness and
help more than you can imagine. Thank you!
spiritstone, I live in MI but on the Lake Huron side. I'd love to read the info you have in pdf. Is it possible
to post a link? If not, PM me and I'll send my email address. Thank you!