Outcrop and Hand Sample Photos and Videos
The “Striped Rock” name comes from Anna Jonas Stose. The “stripes” are not part of the rock itself; rather, they are formed from oxidation and staining of the surface of the granite as can be seen in the 1st picture of a quarry wall:
The Striped Rock granite does contain enclaves, or xenoliths, of a more mafic igneous rock. There is a long, skinny enclave in the boulder to the right of the person with the red hat (below). You can also see an example in the YouTube hand sample video.
Thin Section Photos and Videos
1st = plane polarized light; 2nd = cross-polarized light.
Biotite, quartz, k-feldspar. Can you see the recrystallization texture in the quartz?
Entire thin section scan. 1st = ppl; 2nd = xpl.