Fig. 6. Early stage of K-feldspar replacement of plagioclase. Interstitial K-feldspar (light gray; extending from left to right through center of photo) replaces albite-twinned and zoned plagioclase (black, white, gray) above and below the K-feldspar. K-replacements occur along broken grain-boundary seals. Note a curved fracture that extends upward through a plagioclase crystal above the top edge of the K-feldspar and that the K-feldspar penetrates the plagioclase along this fracture. Rim myrmekite occurs on edges of the plagioclase against the K-feldspar on left and right ends of the K-feldspar. Hornblende (olive green; top edge). Biotite (brown, black; center). Tissue thread in thin section glue (above center). Thin section 1045 from Loomis collection (unknown location but similar to textures in the Dicks Lake granodiorite).